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ent/doc: fix getting started example and add link to Github
Reviewed By: alexsn Differential Revision: D17734937 fbshipit-source-id: abced88c23b7385d371361c5069292de5c1c5b1e
This commit is contained in:
Ariel Mashraki
committed by
Facebook Github Bot
Facebook Github Bot
parent
86c14d7a3c
commit
6d159024e7
629
examples/start/ent/user_query.go
Normal file
629
examples/start/ent/user_query.go
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@@ -0,0 +1,629 @@
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// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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// This source code is licensed under the Apache 2.0 license found
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// in the LICENSE file in the root directory of this source tree.
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// Code generated (@generated) by entc, DO NOT EDIT.
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package ent
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import (
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"context"
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"errors"
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"fmt"
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"math"
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"github.com/facebookincubator/ent/dialect/sql"
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"github.com/facebookincubator/ent/examples/start/ent/car"
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"github.com/facebookincubator/ent/examples/start/ent/group"
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"github.com/facebookincubator/ent/examples/start/ent/predicate"
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"github.com/facebookincubator/ent/examples/start/ent/user"
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)
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// UserQuery is the builder for querying User entities.
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type UserQuery struct {
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config
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limit *int
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offset *int
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order []Order
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unique []string
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predicates []predicate.User
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// intermediate queries.
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sql *sql.Selector
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}
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// Where adds a new predicate for the builder.
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func (uq *UserQuery) Where(ps ...predicate.User) *UserQuery {
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uq.predicates = append(uq.predicates, ps...)
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return uq
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}
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// Limit adds a limit step to the query.
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func (uq *UserQuery) Limit(limit int) *UserQuery {
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uq.limit = &limit
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return uq
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}
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// Offset adds an offset step to the query.
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func (uq *UserQuery) Offset(offset int) *UserQuery {
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uq.offset = &offset
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return uq
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}
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// Order adds an order step to the query.
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func (uq *UserQuery) Order(o ...Order) *UserQuery {
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uq.order = append(uq.order, o...)
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return uq
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}
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// QueryCars chains the current query on the cars edge.
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func (uq *UserQuery) QueryCars() *CarQuery {
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query := &CarQuery{config: uq.config}
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t1 := sql.Table(car.Table)
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t2 := uq.sqlQuery()
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t2.Select(t2.C(user.FieldID))
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query.sql = sql.Select().
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From(t1).
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Join(t2).
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On(t1.C(user.CarsColumn), t2.C(user.FieldID))
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return query
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}
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// QueryGroups chains the current query on the groups edge.
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func (uq *UserQuery) QueryGroups() *GroupQuery {
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query := &GroupQuery{config: uq.config}
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t1 := sql.Table(group.Table)
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t2 := uq.sqlQuery()
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t2.Select(t2.C(user.FieldID))
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t3 := sql.Table(user.GroupsTable)
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t4 := sql.Select(t3.C(user.GroupsPrimaryKey[0])).
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From(t3).
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Join(t2).
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On(t3.C(user.GroupsPrimaryKey[1]), t2.C(user.FieldID))
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query.sql = sql.Select().
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From(t1).
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Join(t4).
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On(t1.C(group.FieldID), t4.C(user.GroupsPrimaryKey[0]))
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return query
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}
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// First returns the first User entity in the query. Returns *ErrNotFound when no user was found.
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func (uq *UserQuery) First(ctx context.Context) (*User, error) {
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us, err := uq.Limit(1).All(ctx)
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if err != nil {
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return nil, err
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}
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if len(us) == 0 {
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return nil, &ErrNotFound{user.Label}
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}
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return us[0], nil
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}
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// FirstX is like First, but panics if an error occurs.
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func (uq *UserQuery) FirstX(ctx context.Context) *User {
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u, err := uq.First(ctx)
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if err != nil && !IsNotFound(err) {
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panic(err)
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}
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return u
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}
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// FirstID returns the first User id in the query. Returns *ErrNotFound when no id was found.
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func (uq *UserQuery) FirstID(ctx context.Context) (id int, err error) {
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var ids []int
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if ids, err = uq.Limit(1).IDs(ctx); err != nil {
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return
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}
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if len(ids) == 0 {
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err = &ErrNotFound{user.Label}
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return
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}
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return ids[0], nil
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}
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// FirstXID is like FirstID, but panics if an error occurs.
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func (uq *UserQuery) FirstXID(ctx context.Context) int {
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id, err := uq.FirstID(ctx)
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if err != nil && !IsNotFound(err) {
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panic(err)
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}
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return id
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}
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// Only returns the only User entity in the query, returns an error if not exactly one entity was returned.
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func (uq *UserQuery) Only(ctx context.Context) (*User, error) {
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us, err := uq.Limit(2).All(ctx)
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if err != nil {
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return nil, err
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}
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switch len(us) {
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case 1:
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return us[0], nil
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case 0:
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return nil, &ErrNotFound{user.Label}
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default:
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return nil, &ErrNotSingular{user.Label}
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}
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}
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// OnlyX is like Only, but panics if an error occurs.
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func (uq *UserQuery) OnlyX(ctx context.Context) *User {
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u, err := uq.Only(ctx)
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if err != nil {
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panic(err)
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}
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return u
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}
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// OnlyID returns the only User id in the query, returns an error if not exactly one id was returned.
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func (uq *UserQuery) OnlyID(ctx context.Context) (id int, err error) {
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var ids []int
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if ids, err = uq.Limit(2).IDs(ctx); err != nil {
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return
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}
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switch len(ids) {
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case 1:
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id = ids[0]
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case 0:
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err = &ErrNotFound{user.Label}
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default:
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err = &ErrNotSingular{user.Label}
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}
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return
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}
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// OnlyXID is like OnlyID, but panics if an error occurs.
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func (uq *UserQuery) OnlyXID(ctx context.Context) int {
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id, err := uq.OnlyID(ctx)
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if err != nil {
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panic(err)
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}
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return id
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}
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// All executes the query and returns a list of Users.
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func (uq *UserQuery) All(ctx context.Context) ([]*User, error) {
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return uq.sqlAll(ctx)
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}
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// AllX is like All, but panics if an error occurs.
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func (uq *UserQuery) AllX(ctx context.Context) []*User {
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us, err := uq.All(ctx)
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if err != nil {
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panic(err)
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}
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return us
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}
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// IDs executes the query and returns a list of User ids.
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func (uq *UserQuery) IDs(ctx context.Context) ([]int, error) {
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return uq.sqlIDs(ctx)
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}
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// IDsX is like IDs, but panics if an error occurs.
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func (uq *UserQuery) IDsX(ctx context.Context) []int {
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ids, err := uq.IDs(ctx)
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if err != nil {
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panic(err)
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}
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return ids
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}
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// Count returns the count of the given query.
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func (uq *UserQuery) Count(ctx context.Context) (int, error) {
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return uq.sqlCount(ctx)
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}
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// CountX is like Count, but panics if an error occurs.
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func (uq *UserQuery) CountX(ctx context.Context) int {
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count, err := uq.Count(ctx)
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if err != nil {
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panic(err)
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}
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return count
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}
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// Exist returns true if the query has elements in the graph.
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func (uq *UserQuery) Exist(ctx context.Context) (bool, error) {
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return uq.sqlExist(ctx)
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}
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// ExistX is like Exist, but panics if an error occurs.
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func (uq *UserQuery) ExistX(ctx context.Context) bool {
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exist, err := uq.Exist(ctx)
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if err != nil {
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panic(err)
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}
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return exist
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}
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// Clone returns a duplicate of the query builder, including all associated steps. It can be
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// used to prepare common query builders and use them differently after the clone is made.
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func (uq *UserQuery) Clone() *UserQuery {
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return &UserQuery{
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config: uq.config,
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limit: uq.limit,
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offset: uq.offset,
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order: append([]Order{}, uq.order...),
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unique: append([]string{}, uq.unique...),
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predicates: append([]predicate.User{}, uq.predicates...),
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// clone intermediate queries.
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sql: uq.sql.Clone(),
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}
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}
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// GroupBy used to group vertices by one or more fields/columns.
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// It is often used with aggregate functions, like: count, max, mean, min, sum.
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//
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// Example:
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//
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// var v []struct {
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// Age int `json:"age,omitempty"`
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// Count int `json:"count,omitempty"`
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// }
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//
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// client.User.Query().
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// GroupBy(user.FieldAge).
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// Aggregate(ent.Count()).
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// Scan(ctx, &v)
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//
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func (uq *UserQuery) GroupBy(field string, fields ...string) *UserGroupBy {
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group := &UserGroupBy{config: uq.config}
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group.fields = append([]string{field}, fields...)
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group.sql = uq.sqlQuery()
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return group
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}
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// Select one or more fields from the given query.
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//
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// Example:
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//
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// var v []struct {
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// Age int `json:"age,omitempty"`
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// }
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//
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// client.User.Query().
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// Select(user.FieldAge).
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// Scan(ctx, &v)
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//
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func (uq *UserQuery) Select(field string, fields ...string) *UserSelect {
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selector := &UserSelect{config: uq.config}
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selector.fields = append([]string{field}, fields...)
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selector.sql = uq.sqlQuery()
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return selector
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}
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func (uq *UserQuery) sqlAll(ctx context.Context) ([]*User, error) {
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rows := &sql.Rows{}
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selector := uq.sqlQuery()
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if unique := uq.unique; len(unique) == 0 {
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selector.Distinct()
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}
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query, args := selector.Query()
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if err := uq.driver.Query(ctx, query, args, rows); err != nil {
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return nil, err
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}
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defer rows.Close()
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var us Users
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if err := us.FromRows(rows); err != nil {
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return nil, err
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}
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us.config(uq.config)
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return us, nil
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}
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func (uq *UserQuery) sqlCount(ctx context.Context) (int, error) {
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rows := &sql.Rows{}
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selector := uq.sqlQuery()
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unique := []string{user.FieldID}
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if len(uq.unique) > 0 {
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unique = uq.unique
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}
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selector.Count(sql.Distinct(selector.Columns(unique...)...))
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query, args := selector.Query()
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if err := uq.driver.Query(ctx, query, args, rows); err != nil {
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return 0, err
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}
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defer rows.Close()
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if !rows.Next() {
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return 0, errors.New("ent: no rows found")
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}
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var n int
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if err := rows.Scan(&n); err != nil {
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return 0, fmt.Errorf("ent: failed reading count: %v", err)
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}
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return n, nil
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}
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func (uq *UserQuery) sqlExist(ctx context.Context) (bool, error) {
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n, err := uq.sqlCount(ctx)
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if err != nil {
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return false, fmt.Errorf("ent: check existence: %v", err)
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}
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return n > 0, nil
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}
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func (uq *UserQuery) sqlIDs(ctx context.Context) ([]int, error) {
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vs, err := uq.sqlAll(ctx)
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if err != nil {
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return nil, err
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}
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var ids []int
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for _, v := range vs {
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ids = append(ids, v.ID)
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}
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return ids, nil
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}
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func (uq *UserQuery) sqlQuery() *sql.Selector {
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t1 := sql.Table(user.Table)
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selector := sql.Select(t1.Columns(user.Columns...)...).From(t1)
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if uq.sql != nil {
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selector = uq.sql
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selector.Select(selector.Columns(user.Columns...)...)
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}
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for _, p := range uq.predicates {
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p(selector)
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}
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for _, p := range uq.order {
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p(selector)
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}
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if offset := uq.offset; offset != nil {
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// limit is mandatory for offset clause. We start
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// with default value, and override it below if needed.
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selector.Offset(*offset).Limit(math.MaxInt64)
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}
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if limit := uq.limit; limit != nil {
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selector.Limit(*limit)
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}
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return selector
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}
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// UserGroupBy is the builder for group-by User entities.
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type UserGroupBy struct {
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config
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fields []string
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fns []Aggregate
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// intermediate queries.
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sql *sql.Selector
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}
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// Aggregate adds the given aggregation functions to the group-by query.
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func (ugb *UserGroupBy) Aggregate(fns ...Aggregate) *UserGroupBy {
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ugb.fns = append(ugb.fns, fns...)
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return ugb
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}
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// Scan applies the group-by query and scan the result into the given value.
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func (ugb *UserGroupBy) Scan(ctx context.Context, v interface{}) error {
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return ugb.sqlScan(ctx, v)
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}
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// ScanX is like Scan, but panics if an error occurs.
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func (ugb *UserGroupBy) ScanX(ctx context.Context, v interface{}) {
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if err := ugb.Scan(ctx, v); err != nil {
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panic(err)
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}
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}
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// Strings returns list of strings from group-by. It is only allowed when querying group-by with one field.
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func (ugb *UserGroupBy) Strings(ctx context.Context) ([]string, error) {
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if len(ugb.fields) > 1 {
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return nil, errors.New("ent: UserGroupBy.Strings is not achievable when grouping more than 1 field")
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}
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var v []string
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if err := ugb.Scan(ctx, &v); err != nil {
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return nil, err
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}
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return v, nil
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}
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// StringsX is like Strings, but panics if an error occurs.
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func (ugb *UserGroupBy) StringsX(ctx context.Context) []string {
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v, err := ugb.Strings(ctx)
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if err != nil {
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panic(err)
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}
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return v
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}
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// Ints returns list of ints from group-by. It is only allowed when querying group-by with one field.
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func (ugb *UserGroupBy) Ints(ctx context.Context) ([]int, error) {
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if len(ugb.fields) > 1 {
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return nil, errors.New("ent: UserGroupBy.Ints is not achievable when grouping more than 1 field")
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}
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var v []int
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if err := ugb.Scan(ctx, &v); err != nil {
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return nil, err
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}
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return v, nil
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}
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// IntsX is like Ints, but panics if an error occurs.
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func (ugb *UserGroupBy) IntsX(ctx context.Context) []int {
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v, err := ugb.Ints(ctx)
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if err != nil {
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panic(err)
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}
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return v
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}
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// Float64s returns list of float64s from group-by. It is only allowed when querying group-by with one field.
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func (ugb *UserGroupBy) Float64s(ctx context.Context) ([]float64, error) {
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if len(ugb.fields) > 1 {
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return nil, errors.New("ent: UserGroupBy.Float64s is not achievable when grouping more than 1 field")
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}
|
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var v []float64
|
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if err := ugb.Scan(ctx, &v); err != nil {
|
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return nil, err
|
||||
}
|
||||
return v, nil
|
||||
}
|
||||
|
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// Float64sX is like Float64s, but panics if an error occurs.
|
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func (ugb *UserGroupBy) Float64sX(ctx context.Context) []float64 {
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v, err := ugb.Float64s(ctx)
|
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if err != nil {
|
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panic(err)
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
// Bools returns list of bools from group-by. It is only allowed when querying group-by with one field.
|
||||
func (ugb *UserGroupBy) Bools(ctx context.Context) ([]bool, error) {
|
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if len(ugb.fields) > 1 {
|
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return nil, errors.New("ent: UserGroupBy.Bools is not achievable when grouping more than 1 field")
|
||||
}
|
||||
var v []bool
|
||||
if err := ugb.Scan(ctx, &v); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return v, nil
|
||||
}
|
||||
|
||||
// BoolsX is like Bools, but panics if an error occurs.
|
||||
func (ugb *UserGroupBy) BoolsX(ctx context.Context) []bool {
|
||||
v, err := ugb.Bools(ctx)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
func (ugb *UserGroupBy) sqlScan(ctx context.Context, v interface{}) error {
|
||||
rows := &sql.Rows{}
|
||||
query, args := ugb.sqlQuery().Query()
|
||||
if err := ugb.driver.Query(ctx, query, args, rows); err != nil {
|
||||
return err
|
||||
}
|
||||
defer rows.Close()
|
||||
return sql.ScanSlice(rows, v)
|
||||
}
|
||||
|
||||
func (ugb *UserGroupBy) sqlQuery() *sql.Selector {
|
||||
selector := ugb.sql
|
||||
columns := make([]string, 0, len(ugb.fields)+len(ugb.fns))
|
||||
columns = append(columns, ugb.fields...)
|
||||
for _, fn := range ugb.fns {
|
||||
columns = append(columns, fn.SQL(selector))
|
||||
}
|
||||
return selector.Select(columns...).GroupBy(ugb.fields...)
|
||||
}
|
||||
|
||||
// UserSelect is the builder for select fields of User entities.
|
||||
type UserSelect struct {
|
||||
config
|
||||
fields []string
|
||||
// intermediate queries.
|
||||
sql *sql.Selector
|
||||
}
|
||||
|
||||
// Scan applies the selector query and scan the result into the given value.
|
||||
func (us *UserSelect) Scan(ctx context.Context, v interface{}) error {
|
||||
return us.sqlScan(ctx, v)
|
||||
}
|
||||
|
||||
// ScanX is like Scan, but panics if an error occurs.
|
||||
func (us *UserSelect) ScanX(ctx context.Context, v interface{}) {
|
||||
if err := us.Scan(ctx, v); err != nil {
|
||||
panic(err)
|
||||
}
|
||||
}
|
||||
|
||||
// Strings returns list of strings from selector. It is only allowed when selecting one field.
|
||||
func (us *UserSelect) Strings(ctx context.Context) ([]string, error) {
|
||||
if len(us.fields) > 1 {
|
||||
return nil, errors.New("ent: UserSelect.Strings is not achievable when selecting more than 1 field")
|
||||
}
|
||||
var v []string
|
||||
if err := us.Scan(ctx, &v); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return v, nil
|
||||
}
|
||||
|
||||
// StringsX is like Strings, but panics if an error occurs.
|
||||
func (us *UserSelect) StringsX(ctx context.Context) []string {
|
||||
v, err := us.Strings(ctx)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
// Ints returns list of ints from selector. It is only allowed when selecting one field.
|
||||
func (us *UserSelect) Ints(ctx context.Context) ([]int, error) {
|
||||
if len(us.fields) > 1 {
|
||||
return nil, errors.New("ent: UserSelect.Ints is not achievable when selecting more than 1 field")
|
||||
}
|
||||
var v []int
|
||||
if err := us.Scan(ctx, &v); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return v, nil
|
||||
}
|
||||
|
||||
// IntsX is like Ints, but panics if an error occurs.
|
||||
func (us *UserSelect) IntsX(ctx context.Context) []int {
|
||||
v, err := us.Ints(ctx)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
// Float64s returns list of float64s from selector. It is only allowed when selecting one field.
|
||||
func (us *UserSelect) Float64s(ctx context.Context) ([]float64, error) {
|
||||
if len(us.fields) > 1 {
|
||||
return nil, errors.New("ent: UserSelect.Float64s is not achievable when selecting more than 1 field")
|
||||
}
|
||||
var v []float64
|
||||
if err := us.Scan(ctx, &v); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return v, nil
|
||||
}
|
||||
|
||||
// Float64sX is like Float64s, but panics if an error occurs.
|
||||
func (us *UserSelect) Float64sX(ctx context.Context) []float64 {
|
||||
v, err := us.Float64s(ctx)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
// Bools returns list of bools from selector. It is only allowed when selecting one field.
|
||||
func (us *UserSelect) Bools(ctx context.Context) ([]bool, error) {
|
||||
if len(us.fields) > 1 {
|
||||
return nil, errors.New("ent: UserSelect.Bools is not achievable when selecting more than 1 field")
|
||||
}
|
||||
var v []bool
|
||||
if err := us.Scan(ctx, &v); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return v, nil
|
||||
}
|
||||
|
||||
// BoolsX is like Bools, but panics if an error occurs.
|
||||
func (us *UserSelect) BoolsX(ctx context.Context) []bool {
|
||||
v, err := us.Bools(ctx)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
func (us *UserSelect) sqlScan(ctx context.Context, v interface{}) error {
|
||||
rows := &sql.Rows{}
|
||||
query, args := us.sqlQuery().Query()
|
||||
if err := us.driver.Query(ctx, query, args, rows); err != nil {
|
||||
return err
|
||||
}
|
||||
defer rows.Close()
|
||||
return sql.ScanSlice(rows, v)
|
||||
}
|
||||
|
||||
func (us *UserSelect) sqlQuery() sql.Querier {
|
||||
view := "user_view"
|
||||
return sql.Select(us.fields...).From(us.sql.As(view))
|
||||
}
|
||||
Reference in New Issue
Block a user