migrate

Documentation

Index

• Variables
• type Schema
  • func NewSchema(drv dialect.Driver) *Schema
  • func (s *Schema) Create(ctx context.Context, opts ...schema.MigrateOption) error
  • func (s *Schema) WriteTo(ctx context.Context, w io.Writer, opts ...schema.MigrateOption) error

Variables

var (
	// WithGlobalUniqueID sets the universal ids options to the migration.
	// If this option is enabled, ent migration will allocate a 1<<32 range
	// for the ids of each entity (table).
	// Note that this option cannot be applied on tables that already exist.
	WithGlobalUniqueID = schema.WithGlobalUniqueID
	// WithDropColumn sets the drop column option to the migration.
	// If this option is enabled, ent migration will drop old columns
	// that were used for both fields and edges. This defaults to false.
	WithDropColumn = schema.WithDropColumn
	// WithDropIndex sets the drop index option to the migration.
	// If this option is enabled, ent migration will drop old indexes
	// that were defined in the schema. This defaults to false.
	// Note that unique constraints are defined using `UNIQUE INDEX`,
	// and therefore, it's recommended to enable this option to get more
	// flexibility in the schema changes.
	WithDropIndex = schema.WithDropIndex
	// WithFixture sets the foreign-key renaming option to the migration when upgrading
	// ent from v0.1.0 (issue-#285). Defaults to false.
	WithFixture = schema.WithFixture
	// WithForeignKeys enables creating foreign-key in schema DDL. This defaults to true.
	WithForeignKeys = schema.WithForeignKeys
)

var (
	// CarsColumns holds the columns for the "cars" table.
	CarsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
		{Name: "user_car", Type: field.TypeInt, Nullable: true},
	}
	// CarsTable holds the schema information for the "cars" table.
	CarsTable = &schema.Table{
		Name:       "cars",
		Columns:    CarsColumns,
		PrimaryKey: []*schema.Column{CarsColumns[0]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:  "cars_users_car",
				Columns: []*schema.Column{CarsColumns[1]},

				RefColumns: []*schema.Column{UsersColumns[0]},
				OnDelete:   schema.SetNull,
			},
		},
	}
	// ConversionsColumns holds the columns for the "conversions" table.
	ConversionsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
		{Name: "name", Type: field.TypeString, Nullable: true},
		{Name: "int8_to_string", Type: field.TypeString, Nullable: true, Size: 6},
		{Name: "uint8_to_string", Type: field.TypeString, Nullable: true, Size: 6},
		{Name: "int16_to_string", Type: field.TypeString, Nullable: true, Size: 6},
		{Name: "uint16_to_string", Type: field.TypeString, Nullable: true, Size: 6},
		{Name: "int32_to_string", Type: field.TypeString, Nullable: true, Size: 12},
		{Name: "uint32_to_string", Type: field.TypeString, Nullable: true, Size: 12},
		{Name: "int64_to_string", Type: field.TypeString, Nullable: true, Size: 21},
		{Name: "uint64_to_string", Type: field.TypeString, Nullable: true, Size: 21},
	}
	// ConversionsTable holds the schema information for the "conversions" table.
	ConversionsTable = &schema.Table{
		Name:        "conversions",
		Columns:     ConversionsColumns,
		PrimaryKey:  []*schema.Column{ConversionsColumns[0]},
		ForeignKeys: []*schema.ForeignKey{},
	}
	// CustomTypesColumns holds the columns for the "custom_types" table.
	CustomTypesColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
		{Name: "custom", Type: field.TypeString, Nullable: true, SchemaType: map[string]string{"postgres": "customtype"}},
	}
	// CustomTypesTable holds the schema information for the "custom_types" table.
	CustomTypesTable = &schema.Table{
		Name:        "custom_types",
		Columns:     CustomTypesColumns,
		PrimaryKey:  []*schema.Column{CustomTypesColumns[0]},
		ForeignKeys: []*schema.ForeignKey{},
	}
	// GroupsColumns holds the columns for the "groups" table.
	GroupsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
	}
	// GroupsTable holds the schema information for the "groups" table.
	GroupsTable = &schema.Table{
		Name:        "groups",
		Columns:     GroupsColumns,
		PrimaryKey:  []*schema.Column{GroupsColumns[0]},
		ForeignKeys: []*schema.ForeignKey{},
	}
	// MediaColumns holds the columns for the "media" table.
	MediaColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
		{Name: "source", Type: field.TypeString, Nullable: true},
		{Name: "source_uri", Type: field.TypeString, Nullable: true},
	}
	// MediaTable holds the schema information for the "media" table.
	MediaTable = &schema.Table{
		Name:        "media",
		Columns:     MediaColumns,
		PrimaryKey:  []*schema.Column{MediaColumns[0]},
		ForeignKeys: []*schema.ForeignKey{},
		Indexes: []*schema.Index{
			{
				Name:    "media_source_source_uri",
				Unique:  true,
				Columns: []*schema.Column{MediaColumns[1], MediaColumns[2]},
			},
		},
	}
	// PetsColumns holds the columns for the "pets" table.
	PetsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
		{Name: "owner_id", Type: field.TypeInt, Unique: true, Nullable: true},
	}
	// PetsTable holds the schema information for the "pets" table.
	PetsTable = &schema.Table{
		Name:       "pets",
		Columns:    PetsColumns,
		PrimaryKey: []*schema.Column{PetsColumns[0]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:  "pets_users_pets",
				Columns: []*schema.Column{PetsColumns[1]},

				RefColumns: []*schema.Column{UsersColumns[0]},
				OnDelete:   schema.SetNull,
			},
		},
	}
	// UsersColumns holds the columns for the "users" table.
	UsersColumns = []*schema.Column{
		{Name: "oid", Type: field.TypeInt, Increment: true},
		{Name: "mixed_string", Type: field.TypeString, Default: "default"},
		{Name: "mixed_enum", Type: field.TypeEnum, Enums: []string{"on", "off"}, Default: "on"},
		{Name: "age", Type: field.TypeInt},
		{Name: "name", Type: field.TypeString, Size: 2147483647},
		{Name: "nickname", Type: field.TypeString, Size: 255},
		{Name: "phone", Type: field.TypeString, Default: "unknown"},
		{Name: "buffer", Type: field.TypeBytes, Nullable: true},
		{Name: "title", Type: field.TypeString, Default: "SWE"},
		{Name: "renamed", Type: field.TypeString, Nullable: true},
		{Name: "blob", Type: field.TypeBytes, Nullable: true, Size: 1000},
		{Name: "state", Type: field.TypeEnum, Nullable: true, Enums: []string{"logged_in", "logged_out", "online"}},
		{Name: "status", Type: field.TypeEnum, Nullable: true, Enums: []string{"done", "pending"}},
		{Name: "workplace", Type: field.TypeString, Nullable: true},
	}
	// UsersTable holds the schema information for the "users" table.
	UsersTable = &schema.Table{
		Name:        "users",
		Columns:     UsersColumns,
		PrimaryKey:  []*schema.Column{UsersColumns[0]},
		ForeignKeys: []*schema.ForeignKey{},
		Indexes: []*schema.Index{
			{
				Name:    "user_phone_age",
				Unique:  true,
				Columns: []*schema.Column{UsersColumns[6], UsersColumns[3]},
			},
		},
	}
	// FriendsColumns holds the columns for the "friends" table.
	FriendsColumns = []*schema.Column{
		{Name: "user", Type: field.TypeInt},
		{Name: "friend", Type: field.TypeInt},
	}
	// FriendsTable holds the schema information for the "friends" table.
	FriendsTable = &schema.Table{
		Name:       "friends",
		Columns:    FriendsColumns,
		PrimaryKey: []*schema.Column{FriendsColumns[0], FriendsColumns[1]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:  "friends_user",
				Columns: []*schema.Column{FriendsColumns[0]},

				RefColumns: []*schema.Column{UsersColumns[0]},
				OnDelete:   schema.Cascade,
			},
			{
				Symbol:  "friends_friend",
				Columns: []*schema.Column{FriendsColumns[1]},

				RefColumns: []*schema.Column{UsersColumns[0]},
				OnDelete:   schema.Cascade,
			},
		},
	}
	// Tables holds all the tables in the schema.
	Tables = []*schema.Table{
		CarsTable,
		ConversionsTable,
		CustomTypesTable,
		GroupsTable,
		MediaTable,
		PetsTable,
		UsersTable,
		FriendsTable,
	}
)

Types

type Schema

type Schema struct {
	// contains filtered or unexported fields
}

Schema is the API for creating, migrating and dropping a schema.

func NewSchema

func NewSchema(drv dialect.Driver) *Schema

NewSchema creates a new schema client.

func (*Schema) Create

func (s *Schema) Create(ctx context.Context, opts ...schema.MigrateOption) error

Create creates all schema resources.

func (*Schema) WriteTo

func (s *Schema) WriteTo(ctx context.Context, w io.Writer, opts ...schema.MigrateOption) error

WriteTo writes the schema changes to w instead of running them against the database.

if err := client.Schema.WriteTo(context.Background(), os.Stdout); err != nil {
	log.Fatal(err)
}