* dialect/sql/schema: add method to create a named versioned migration file
* doc/md: documentation for named versioned migrations
* entc/gen/template/dialect/sql/feature: add NamedDiff method to create named versioned migration files
* all: go generate
* doc/md: apply CR
* dialect/sql/schema: fix go doc
* all: update atlas
* dialect/sql/schema: diff connected DB and defined schema and write changes to migration file
* dialect/sql/schema: use migration directory and formatter directly instead of a planner
* all: update atlas
* cmd: add command to create a new migration file
* entc/gen: generate main.go with migrate diff example
* all: regenerate
* cmd/internal/base: make linter happy
* all: support Go 1.16 in versioned migrations main.go
* entc/gen: put versioned migrations behind feature flag
* all: regenerate
* cmd/ent: driver-prefixed dsn in migrate diff command
* cmd/internal/base: remove prefix from migrate import
* cmd/internal/base: use cobra.CheckErr
* cmd: remove diff command
* entc/gen/template/dialect/sql/feature: remove generated main.go
* all: rebase on master and go mod tidy
* all: regenerate
The new Alias option adds package aliases (local names) for all type-packages that
their import identifier conflicts with user-defined packages (i.e. GoType).
* Fix entql generation for ID types of Bytes, etc.
I was running into an issue trying to use a Bytes fieldas the ID field in a Schema, and it appears there is an currently an issue with using a Bytes field as the ID field in the entql codegen (it was outputing a function . I belive this should fix it (I tested this by adding the entql flag to the custom id integration test). I wasn't sure if the other cases I added (e.g. an ID field that is json type / time type / etc.) are actually sane ID field types, but if those don't make any sense I can remove some of those from the added conditionals.
* remove redundant line
Also, for some reason, the TimeMixin.UpdateTime was an immutable field,
but this was incorrent, because the codegen just skip generating
update setters to it. Removing the Immutable modifier allows users
to set this field explicitly.
* entc/gen/template/dialect/sql: cleaning up isSQLConstraintError in generated ent.go to use new sqlgraph IsConstraintError checks.
Adding IsFK and IsUniqueness methods to the generated ent.ConstraintError (on SQL dialects) struct to allow users to glean more information about the specific constraint violation.
Fixes#1310
* fix indentation in tmpl file
regen files
rm new methods from generated code
* regen
