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683 lines
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683 lines
24 KiB
Plaintext
---
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id: privacy
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title: Privacy
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---
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import Tabs from '@theme/Tabs';
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import TabItem from '@theme/TabItem';
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The `Policy` option in the schema allows configuring privacy policy for queries and mutations of entities in the database.
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The main advantage of the privacy layer is that, you write the privacy policy **once** (in the schema), and it is **always**
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evaluated. No matter where queries and mutations are performed in your codebase, it will always go through the privacy layer.
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In this tutorial, we will start by going over the basic terms we use in the framework, continue with a section for configuring
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the policy feature to your project, and finish with a few examples.
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## Basic Terms
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### Policy
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The `ent.Policy` interface contains two methods: `EvalQuery` and `EvalMutation`. The first defines the read-policy, and
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the second defines the write-policy. A policy contains zero or more privacy rules (see below). These rules are evaluated
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in the same order they are declared in the schema.
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If all rules are evaluated without returning an error, the evaluation finishes successfully, and the executed operation
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gets access to the target nodes.
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However, if one of the evaluated rules returns an error or a `privacy.Deny` decision (see below), the executed operation
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returns an error, and it is cancelled.
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### Privacy Rules
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Each policy (mutation or query) includes one or more privacy rules. The function signature for these rules is as follows:
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```go
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// EvalQuery defines the a read-policy rule.
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func(Policy) EvalQuery(context.Context, Query) error
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// EvalMutation defines the a write-policy rule.
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func(Policy) EvalMutation(context.Context, Mutation) error
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```
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### Privacy Decisions
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There are three types of decision that can help you control the privacy rules evaluation.
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- `privacy.Allow` - If returned from a privacy rule, the evaluation stops (next rules will be skipped), and the executed
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operation (query or mutation) gets access to the target nodes.
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- `privacy.Deny` - If returned from a privacy rule, the evaluation stops (next rules will be skipped), and the executed
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operation is cancelled. This equivalent to returning any error.
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- `privacy.Skip` - Skip the current rule, and jump to the next privacy rule. This equivalent to returning a `nil` error.
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Now that we’ve covered the basic terms, let’s start writing some code.
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## Configuration
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In order to enable the privacy option in your code generation, enable the `privacy` feature with one of two options:
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<Tabs>
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<TabItem value="cli" label="CLI" default>
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If you are using the default go generate config, add `--feature privacy` option to the `ent/generate.go` file as follows:
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```go title="ent/generate.go"
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package ent
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//go:generate go run -mod=mod entgo.io/ent/cmd/ent generate --feature privacy ./schema
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```
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It is recommended to add the [`schema/snapshot`](features.md#auto-solve-merge-conflicts) feature-flag along with the
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`privacy` flag to enhance the development experience, for example:
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```go
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//go:generate go run -mod=mod entgo.io/ent/cmd/ent generate --feature privacy,schema/snapshot ./schema
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```
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</TabItem>
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<TabItem value="entc" label="Go">
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If you are using the configuration from the GraphQL documentation, add the feature flag as follows:
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```go
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// +build ignore
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package main
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import (
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"log"
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"entgo.io/ent/entc"
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"entgo.io/ent/entc/gen"
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)
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func main() {
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opts := []entc.Option{
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entc.FeatureNames("privacy"),
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}
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if err := entc.Generate("./schema", &gen.Config{}, opts...); err != nil {
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log.Fatalf("running ent codegen: %v", err)
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}
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}
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```
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It is recommended to add the [`schema/snapshot`](features.md#auto-solve-merge-conflicts) feature-flag along with the
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`privacy` flag to enhance the development experience, for example:
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```diff
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opts := []entc.Option{
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- entc.FeatureNames("privacy"),
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+ entc.FeatureNames("privacy", "schema/snapshot"),
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}
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```
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</TabItem>
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</Tabs>
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#### Privacy Policy Registration
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:::important
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You should notice that similar to [schema hooks](hooks.md#hooks-registration), if you use the **`Policy`** option in your schema,
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you **MUST** add the following import in the main package, because a circular import is possible between the schema package,
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and the generated ent package:
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```go
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import _ "<project>/ent/runtime"
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```
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:::
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## Examples
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### Admin Only
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We start with a simple example of an application that lets any user read any data, and accepts mutations only from users
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with admin role. We will create 2 additional packages for the purpose of the examples:
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- `rule` - for holding the different privacy rules in our schema.
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- `viewer` - for getting and setting the user/viewer who's executing the operation. In this simple example, it can be
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either a normal user or an admin.
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After running the code-generation (with the feature-flag for privacy), we add the `Policy` method with 2 generated policy rules.
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```go title="examples/privacyadmin/ent/schema/user.go"
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package schema
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import (
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"entgo.io/ent"
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"entgo.io/ent/examples/privacyadmin/ent/privacy"
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)
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// User holds the schema definition for the User entity.
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type User struct {
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ent.Schema
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}
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// Policy defines the privacy policy of the User.
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func (User) Policy() ent.Policy {
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return privacy.Policy{
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Mutation: privacy.MutationPolicy{
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// Deny if not set otherwise.
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privacy.AlwaysDenyRule(),
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},
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Query: privacy.QueryPolicy{
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// Allow any viewer to read anything.
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privacy.AlwaysAllowRule(),
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},
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}
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}
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```
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We defined a policy that rejects any mutation and accepts any query. However, as mentioned above, in this example,
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we accept mutations only from viewers with admin role. Let's create 2 privacy rules to enforce this:
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```go title="examples/privacyadmin/rule/rule.go"
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package rule
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import (
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"context"
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"entgo.io/ent/examples/privacyadmin/ent/privacy"
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"entgo.io/ent/examples/privacyadmin/viewer"
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)
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// DenyIfNoViewer is a rule that returns Deny decision if the viewer is
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// missing in the context.
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func DenyIfNoViewer() privacy.QueryMutationRule {
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return privacy.ContextQueryMutationRule(func(ctx context.Context) error {
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view := viewer.FromContext(ctx)
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if view == nil {
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return privacy.Denyf("viewer-context is missing")
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}
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// Skip to the next privacy rule (equivalent to returning nil).
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return privacy.Skip
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})
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}
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// AllowIfAdmin is a rule that returns Allow decision if the viewer is admin.
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func AllowIfAdmin() privacy.QueryMutationRule {
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return privacy.ContextQueryMutationRule(func(ctx context.Context) error {
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view := viewer.FromContext(ctx)
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if view.Admin() {
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return privacy.Allow
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}
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// Skip to the next privacy rule (equivalent to returning nil).
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return privacy.Skip
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})
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}
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```
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As you can see, the first rule `DenyIfNoViewer`, makes sure every operation has a viewer in its context,
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otherwise, the operation rejected. The second rule `AllowIfAdmin`, accepts any operation from viewer with
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admin role. Let's add them to the schema, and run the code-generation:
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```go title="examples/privacyadmin/ent/schema/user.go"
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// Policy defines the privacy policy of the User.
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func (User) Policy() ent.Policy {
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return privacy.Policy{
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Mutation: privacy.MutationPolicy{
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rule.DenyIfNoViewer(),
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rule.AllowIfAdmin(),
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privacy.AlwaysDenyRule(),
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},
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Query: privacy.QueryPolicy{
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privacy.AlwaysAllowRule(),
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},
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}
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}
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```
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Since we define the `DenyIfNoViewer` first, it will be executed before all other rules, and accessing the
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`viewer.Viewer` object is safe in the `AllowIfAdmin` rule.
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After adding the rules above and running the code-generation, we expect the privacy-layer logic to be applied on
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`ent.Client` operations.
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```go title="examples/privacyadmin/example_test.go"
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func Do(ctx context.Context, client *ent.Client) error {
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// Expect operation to fail, because viewer-context
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// is missing (first mutation rule check).
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if err := client.User.Create().Exec(ctx); !errors.Is(err, privacy.Deny) {
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return fmt.Errorf("expect operation to fail, but got %w", err)
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}
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// Apply the same operation with "Admin" role.
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admin := viewer.NewContext(ctx, viewer.UserViewer{Role: viewer.Admin})
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if err := client.User.Create().Exec(admin); err != nil {
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return fmt.Errorf("expect operation to pass, but got %w", err)
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}
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// Apply the same operation with "ViewOnly" role.
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viewOnly := viewer.NewContext(ctx, viewer.UserViewer{Role: viewer.View})
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if err := client.User.Create().Exec(viewOnly); !errors.Is(err, privacy.Deny) {
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return fmt.Errorf("expect operation to fail, but got %w", err)
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}
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// Allow all viewers to query users.
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for _, ctx := range []context.Context{ctx, viewOnly, admin} {
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// Operation should pass for all viewers.
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count := client.User.Query().CountX(ctx)
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fmt.Println(count)
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}
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return nil
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}
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```
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### Decision Context
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Sometimes, we want to bind a specific privacy decision to the `context.Context`. In cases like this, we
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can use the `privacy.DecisionContext` function to create a new context with a privacy decision attached to it.
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```go title="examples/privacyadmin/example_test.go"
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func Do(ctx context.Context, client *ent.Client) error {
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// Bind a privacy decision to the context (bypass all other rules).
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allow := privacy.DecisionContext(ctx, privacy.Allow)
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if err := client.User.Create().Exec(allow); err != nil {
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return fmt.Errorf("expect operation to pass, but got %w", err)
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}
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return nil
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}
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```
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The full example exists in [GitHub](https://github.com/ent/ent/tree/master/examples/privacyadmin).
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### Multi Tenancy
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In this example, we're going to create a schema with 3 entity types - `Tenant`, `User` and `Group`.
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The helper packages `viewer` and `rule` (as mentioned above) also exist in this example to help us structure the application.
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Let's start building this application piece by piece. We begin by creating 3 different schemas (see the full code [here](https://github.com/ent/ent/tree/master/examples/privacytenant/ent/schema)),
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and since we want to share some logic between them, we create another [mixed-in schema](schema-mixin.md) and add it to all other schemas as follows:
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```go title="examples/privacytenant/ent/schema/mixin.go"
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// BaseMixin for all schemas in the graph.
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type BaseMixin struct {
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mixin.Schema
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}
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// Policy defines the privacy policy of the BaseMixin.
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func (BaseMixin) Policy() ent.Policy {
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return privacy.Policy{
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Query: privacy.QueryPolicy{
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// Deny any query operation in case
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// there is no "viewer context".
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rule.DenyIfNoViewer(),
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// Allow admins to query any information.
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rule.AllowIfAdmin(),
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},
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Mutation: privacy.MutationPolicy{
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// Deny any mutation operation in case
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// there is no "viewer context".
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rule.DenyIfNoViewer(),
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},
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}
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}
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```
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```go title="examples/privacytenant/ent/schema/tenant.go"
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// Mixin of the Tenant schema.
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func (Tenant) Mixin() []ent.Mixin {
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return []ent.Mixin{
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BaseMixin{},
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}
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}
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```
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As explained in the first example, the `DenyIfNoViewer` privacy rule, denies the operation if the `context.Context` does not
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contain the `viewer.Viewer` information.
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Similar to the previous example, we want add a constraint that only admin users can create tenants (and deny otherwise).
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We do it by copying the `AllowIfAdmin` rule from above, and adding it to the `Policy` of the `Tenant` schema:
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```go title="examples/privacytenant/ent/schema/tenant.go"
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// Policy defines the privacy policy of the User.
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func (Tenant) Policy() ent.Policy {
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return privacy.Policy{
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Mutation: privacy.MutationPolicy{
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// For Tenant type, we only allow admin users to mutate
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// the tenant information and deny otherwise.
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rule.AllowIfAdmin(),
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privacy.AlwaysDenyRule(),
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},
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}
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}
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```
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Then, we expect the following code to run successfully:
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```go title="examples/privacytenant/example_test.go"
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func Example_CreateTenants(ctx context.Context, client *ent.Client) {
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// Expect operation to fail in case viewer-context is missing.
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// First mutation privacy policy rule defined in BaseMixin.
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if err := client.Tenant.Create().Exec(ctx); !errors.Is(err, privacy.Deny) {
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log.Fatal("expect tenant creation to fail, but got:", err)
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}
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// Expect operation to fail in case the ent.User in the viewer-context
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// is not an admin user. Privacy policy defined in the Tenant schema.
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viewCtx := viewer.NewContext(ctx, viewer.UserViewer{Role: viewer.View})
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if err := client.Tenant.Create().Exec(viewCtx); !errors.Is(err, privacy.Deny) {
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log.Fatal("expect tenant creation to fail, but got:", err)
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}
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// Operations should pass successfully as the user in the viewer-context
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// is an admin user. First mutation privacy policy in Tenant schema.
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adminCtx := viewer.NewContext(ctx, viewer.UserViewer{Role: viewer.Admin})
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hub, err := client.Tenant.Create().SetName("GitHub").Save(adminCtx)
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if err != nil {
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log.Fatal("expect tenant creation to pass, but got:", err)
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}
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fmt.Println(hub)
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lab, err := client.Tenant.Create().SetName("GitLab").Save(adminCtx)
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if err != nil {
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log.Fatal("expect tenant creation to pass, but got:", err)
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}
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fmt.Println(lab)
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// Output:
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// Tenant(id=1, name=GitHub)
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// Tenant(id=2, name=GitLab)
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}
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```
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We continue by adding the rest of the edges in our data-model (see image above), and since both `User` and `Group` have
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an edge to the `Tenant` schema, we create a shared [mixed-in schema](schema-mixin.md) named `TenantMixin` for this:
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```go title="examples/privacytenant/ent/schema/mixin.go"
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// TenantMixin for embedding the tenant info in different schemas.
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type TenantMixin struct {
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mixin.Schema
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}
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// Fields for all schemas that embed TenantMixin.
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func (TenantMixin) Fields() []ent.Field {
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return []ent.Field{
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field.Int("tenant_id").
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Immutable(),
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}
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}
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// Edges for all schemas that embed TenantMixin.
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func (TenantMixin) Edges() []ent.Edge {
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return []ent.Edge{
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edge.To("tenant", Tenant.Type).
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Field("tenant_id").
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Unique().
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Required().
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Immutable(),
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}
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}
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```
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#### Filter Rules
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Next, we may want to enforce a rule that will limit viewers to only query groups and users that are connected to the tenant they belong to.
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For use cases like this, Ent has an additional type of privacy rule named `Filter`.
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We can use `Filter` rules to filter out entities based on the identity of the viewer.
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Unlike the rules we previously discussed, `Filter` rules can limit the scope of the queries a viewer can make, in addition to returning privacy decisions.
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:::info Note
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The privacy filtering option needs to be enabled using the [`entql`](features.md#entql-filtering) feature-flag (see instructions [above](#configuration)).
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:::
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```go title="examples/privacytenant/rule/rule.go"
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// FilterTenantRule is a query/mutation rule that filters out entities that are not in the tenant.
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func FilterTenantRule() privacy.QueryMutationRule {
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// TenantsFilter is an interface to wrap WhereHasTenantWith()
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// predicate that is used by both `Group` and `User` schemas.
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type TenantsFilter interface {
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WhereTenantID(entql.IntP)
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}
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return privacy.FilterFunc(func(ctx context.Context, f privacy.Filter) error {
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view := viewer.FromContext(ctx)
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tid, ok := view.Tenant()
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if !ok {
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return privacy.Denyf("missing tenant information in viewer")
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}
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tf, ok := f.(TenantsFilter)
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if !ok {
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return privacy.Denyf("unexpected filter type %T", f)
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}
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// Make sure that a tenant reads only entities that have an edge to it.
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tf.WhereTenantID(entql.IntEQ(tid))
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// Skip to the next privacy rule (equivalent to return nil).
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return privacy.Skip
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})
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}
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```
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After creating the `FilterTenantRule` privacy rule, we add it to the `TenantMixin` to make sure **all schemas**
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that use this mixin, will also have this privacy rule.
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```go title="examples/privacytenant/ent/schema/mixin.go"
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// Policy for all schemas that embed TenantMixin.
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func (TenantMixin) Policy() ent.Policy {
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return rule.FilterTenantRule()
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}
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```
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Then, after running the code-generation, we expect the privacy-rules to take effect on the client operations.
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```go title="examples/privacytenant/example_test.go"
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func Example_TenantView(ctx context.Context, client *ent.Client) {
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// Operations should pass successfully as the user in the viewer-context
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// is an admin user. First mutation privacy policy in Tenant schema.
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adminCtx := viewer.NewContext(ctx, viewer.UserViewer{Role: viewer.Admin})
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hub := client.Tenant.Create().SetName("GitHub").SaveX(adminCtx)
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lab := client.Tenant.Create().SetName("GitLab").SaveX(adminCtx)
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// Create 2 tenant-specific viewer contexts.
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hubView := viewer.NewContext(ctx, viewer.UserViewer{T: hub})
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labView := viewer.NewContext(ctx, viewer.UserViewer{T: lab})
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// Create 2 users in each tenant.
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hubUsers := client.User.CreateBulk(
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client.User.Create().SetName("a8m").SetTenant(hub),
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client.User.Create().SetName("nati").SetTenant(hub),
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).SaveX(hubView)
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fmt.Println(hubUsers)
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labUsers := client.User.CreateBulk(
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client.User.Create().SetName("foo").SetTenant(lab),
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client.User.Create().SetName("bar").SetTenant(lab),
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).SaveX(labView)
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fmt.Println(labUsers)
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// Query users should fail in case viewer-context is missing.
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if _, err := client.User.Query().Count(ctx); !errors.Is(err, privacy.Deny) {
|
||
log.Fatal("expect user query to fail, but got:", err)
|
||
}
|
||
|
||
// Ensure each tenant can see only its users.
|
||
// First and only rule in TenantMixin.
|
||
fmt.Println(client.User.Query().Select(user.FieldName).StringsX(hubView))
|
||
fmt.Println(client.User.Query().CountX(hubView))
|
||
fmt.Println(client.User.Query().Select(user.FieldName).StringsX(labView))
|
||
fmt.Println(client.User.Query().CountX(labView))
|
||
|
||
// Expect admin users to see everything. First
|
||
// query privacy policy defined in BaseMixin.
|
||
fmt.Println(client.User.Query().CountX(adminCtx)) // 4
|
||
|
||
// Update operation with specific tenant-view should update
|
||
// only the tenant in the viewer-context.
|
||
client.User.Update().SetFoods([]string{"pizza"}).SaveX(hubView)
|
||
fmt.Println(client.User.Query().AllX(hubView))
|
||
fmt.Println(client.User.Query().AllX(labView))
|
||
|
||
// Delete operation with specific tenant-view should delete
|
||
// only the tenant in the viewer-context.
|
||
client.User.Delete().ExecX(labView)
|
||
fmt.Println(
|
||
client.User.Query().CountX(hubView), // 2
|
||
client.User.Query().CountX(labView), // 0
|
||
)
|
||
|
||
// DeleteOne with wrong viewer-context is nop.
|
||
client.User.DeleteOne(hubUsers[0]).ExecX(labView)
|
||
fmt.Println(client.User.Query().CountX(hubView)) // 2
|
||
|
||
// Unlike queries, admin users are not allowed to mutate tenant specific data.
|
||
if err := client.User.DeleteOne(hubUsers[0]).Exec(adminCtx); !errors.Is(err, privacy.Deny) {
|
||
log.Fatal("expect user deletion to fail, but got:", err)
|
||
}
|
||
|
||
// Output:
|
||
// [User(id=1, tenant_id=1, name=a8m, foods=[]) User(id=2, tenant_id=1, name=nati, foods=[])]
|
||
// [User(id=3, tenant_id=2, name=foo, foods=[]) User(id=4, tenant_id=2, name=bar, foods=[])]
|
||
// [a8m nati]
|
||
// 2
|
||
// [foo bar]
|
||
// 2
|
||
// 4
|
||
// [User(id=1, tenant_id=1, name=a8m, foods=[pizza]) User(id=2, tenant_id=1, name=nati, foods=[pizza])]
|
||
// [User(id=3, tenant_id=2, name=foo, foods=[]) User(id=4, tenant_id=2, name=bar, foods=[])]
|
||
// 2 0
|
||
// 2
|
||
}
|
||
```
|
||
|
||
We finish our example with another privacy-rule named `DenyMismatchedTenants` on the `Group` schema.
|
||
The `DenyMismatchedTenants` rule rejects group creation if the associated users do not belong to
|
||
the same tenant as the group.
|
||
|
||
```go title="examples/privacytenant/rule/rule.go"
|
||
// DenyMismatchedTenants is a rule that runs only on create operations and returns a deny
|
||
// decision if the operation tries to add users to groups that are not in the same tenant.
|
||
func DenyMismatchedTenants() privacy.MutationRule {
|
||
return privacy.GroupMutationRuleFunc(func(ctx context.Context, m *ent.GroupMutation) error {
|
||
tid, exists := m.TenantID()
|
||
if !exists {
|
||
return privacy.Denyf("missing tenant information in mutation")
|
||
}
|
||
users := m.UsersIDs()
|
||
// If there are no users in the mutation, skip this rule-check.
|
||
if len(users) == 0 {
|
||
return privacy.Skip
|
||
}
|
||
// Query the tenant-ids of all attached users. Expect all users to be connected to the same tenant
|
||
// as the group. Note, we use privacy.DecisionContext to skip the FilterTenantRule defined above.
|
||
ids, err := m.Client().User.Query().Where(user.IDIn(users...)).Select(user.FieldTenantID).Ints(privacy.DecisionContext(ctx, privacy.Allow))
|
||
if err != nil {
|
||
return privacy.Denyf("querying the tenant-ids %v", err)
|
||
}
|
||
if len(ids) != len(users) {
|
||
return privacy.Denyf("one the attached users is not connected to a tenant %v", err)
|
||
}
|
||
for _, id := range ids {
|
||
if id != tid {
|
||
return privacy.Denyf("mismatch tenant-ids for group/users %d != %d", tid, id)
|
||
}
|
||
}
|
||
// Skip to the next privacy rule (equivalent to return nil).
|
||
return privacy.Skip
|
||
})
|
||
}
|
||
```
|
||
|
||
We add this rule to the `Group` schema and run code-generation.
|
||
|
||
```go title="examples/privacytenant/ent/schema/group.go"
|
||
// Policy defines the privacy policy of the Group.
|
||
func (Group) Policy() ent.Policy {
|
||
return privacy.Policy{
|
||
Mutation: privacy.MutationPolicy{
|
||
// Limit DenyMismatchedTenants only for
|
||
// Create operation
|
||
privacy.OnMutationOperation(
|
||
rule.DenyMismatchedTenants(),
|
||
ent.OpCreate,
|
||
),
|
||
},
|
||
}
|
||
}
|
||
```
|
||
|
||
Again, we expect the privacy-rules to take effect on the client operations.
|
||
|
||
```go title="examples/privacytenant/example_test.go"
|
||
func Example_DenyMismatchedTenants(ctx context.Context, client *ent.Client) {
|
||
// Operation should pass successfully as the user in the viewer-context
|
||
// is an admin user. First mutation privacy policy in Tenant schema.
|
||
adminCtx := viewer.NewContext(ctx, viewer.UserViewer{Role: viewer.Admin})
|
||
hub := client.Tenant.Create().SetName("GitHub").SaveX(adminCtx)
|
||
lab := client.Tenant.Create().SetName("GitLab").SaveX(adminCtx)
|
||
|
||
// Create 2 tenant-specific viewer contexts.
|
||
hubView := viewer.NewContext(ctx, viewer.UserViewer{T: hub})
|
||
labView := viewer.NewContext(ctx, viewer.UserViewer{T: lab})
|
||
|
||
// Create 2 users in each tenant.
|
||
hubUsers := client.User.CreateBulk(
|
||
client.User.Create().SetName("a8m").SetTenant(hub),
|
||
client.User.Create().SetName("nati").SetTenant(hub),
|
||
).SaveX(hubView)
|
||
fmt.Println(hubUsers)
|
||
|
||
labUsers := client.User.CreateBulk(
|
||
client.User.Create().SetName("foo").SetTenant(lab),
|
||
client.User.Create().SetName("bar").SetTenant(lab),
|
||
).SaveX(labView)
|
||
fmt.Println(labUsers)
|
||
|
||
// Expect operation to fail as the DenyMismatchedTenants rule makes
|
||
// sure the group and the users are connected to the same tenant.
|
||
if err := client.Group.Create().SetName("entgo.io").SetTenant(hub).AddUsers(labUsers...).Exec(hubView); !errors.Is(err, privacy.Deny) {
|
||
log.Fatal("expect operation to fail, since labUsers are not connected to the same tenant")
|
||
}
|
||
if err := client.Group.Create().SetName("entgo.io").SetTenant(hub).AddUsers(hubUsers[0], labUsers[0]).Exec(hubView); !errors.Is(err, privacy.Deny) {
|
||
log.Fatal("expect operation to fail, since labUsers[0] is not connected to the same tenant")
|
||
}
|
||
// Expect mutation to pass as all users belong to the same tenant as the group.
|
||
entgo := client.Group.Create().SetName("entgo.io").SetTenant(hub).AddUsers(hubUsers...).SaveX(hubView)
|
||
fmt.Println(entgo)
|
||
|
||
// Output:
|
||
// [User(id=1, tenant_id=1, name=a8m, foods=[]) User(id=2, tenant_id=1, name=nati, foods=[])]
|
||
// [User(id=3, tenant_id=2, name=foo, foods=[]) User(id=4, tenant_id=2, name=bar, foods=[])]
|
||
// Group(id=1, tenant_id=1, name=entgo.io)
|
||
}
|
||
```
|
||
|
||
In some cases, we want to reject user operations on entities that do not belong to their tenant **without loading
|
||
these entities from the database** (unlike the `DenyMismatchedTenants` example above).
|
||
To achieve this, we rely on the `FilterTenantRule` rule to add its filtering on mutations as well, and expect
|
||
operations to fail with `NotFoundError` in case the `tenant_id` column does not match the one stored in the
|
||
viewer-context.
|
||
|
||
```go title="examples/privacytenant/example_test.go"
|
||
func Example_DenyMismatchedView(ctx context.Context, client *ent.Client) {
|
||
// Continuation of the code above.
|
||
|
||
// Expect operation to fail, because the FilterTenantRule rule makes sure
|
||
// that tenants can update and delete only their groups.
|
||
if err := entgo.Update().SetName("fail.go").Exec(labView); !ent.IsNotFound(err) {
|
||
log.Fatal("expect operation to fail, since the group (entgo) is managed by a different tenant (hub), but got:", err)
|
||
}
|
||
|
||
// Operation should pass in case it was applied with the right viewer-context.
|
||
entgo = entgo.Update().SetName("entgo").SaveX(hubView)
|
||
fmt.Println(entgo)
|
||
|
||
// Output:
|
||
// Group(id=1, tenant_id=1, name=entgo)
|
||
}
|
||
```
|
||
|
||
The full example exists in [GitHub](https://github.com/ent/ent/tree/master/examples/privacytenant).
|
||
|
||
Please note that this documentation is under active development.
|