migrate

Documentation

Index

• Variables
• func Create(ctx context.Context, s *Schema, tables []*schema.Table, ...) error
• 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
	// WithForeignKeys enables creating foreign-key in schema DDL. This defaults to true.
	WithForeignKeys = schema.WithForeignKeys
)

var (
	// TasksColumns holds the columns for the "tasks" table.
	TasksColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
		{Name: "title", Type: field.TypeString},
		{Name: "description", Type: field.TypeString, Nullable: true},
		{Name: "status", Type: field.TypeEnum, Enums: []string{"planned", "in_progress", "closed"}, Default: "planned"},
		{Name: "uuid", Type: field.TypeUUID, Nullable: true},
		{Name: "user_tasks", Type: field.TypeInt, Nullable: true},
	}
	// TasksTable holds the schema information for the "tasks" table.
	TasksTable = &schema.Table{
		Name:       "tasks",
		Columns:    TasksColumns,
		PrimaryKey: []*schema.Column{TasksColumns[0]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:     "tasks_users_tasks",
				Columns:    []*schema.Column{TasksColumns[5]},
				RefColumns: []*schema.Column{UsersColumns[0]},
				OnDelete:   schema.SetNull,
			},
		},
	}
	// TeamsColumns holds the columns for the "teams" table.
	TeamsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
		{Name: "name", Type: field.TypeString},
	}
	// TeamsTable holds the schema information for the "teams" table.
	TeamsTable = &schema.Table{
		Name:       "teams",
		Columns:    TeamsColumns,
		PrimaryKey: []*schema.Column{TeamsColumns[0]},
	}
	// UsersColumns holds the columns for the "users" table.
	UsersColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt, Increment: true},
		{Name: "name", Type: field.TypeString, Unique: true},
		{Name: "age", Type: field.TypeUint, Nullable: true},
	}
	// UsersTable holds the schema information for the "users" table.
	UsersTable = &schema.Table{
		Name:       "users",
		Columns:    UsersColumns,
		PrimaryKey: []*schema.Column{UsersColumns[0]},
	}
	// TaskTeamsColumns holds the columns for the "task_teams" table.
	TaskTeamsColumns = []*schema.Column{
		{Name: "task_id", Type: field.TypeInt},
		{Name: "team_id", Type: field.TypeInt},
	}
	// TaskTeamsTable holds the schema information for the "task_teams" table.
	TaskTeamsTable = &schema.Table{
		Name:       "task_teams",
		Columns:    TaskTeamsColumns,
		PrimaryKey: []*schema.Column{TaskTeamsColumns[0], TaskTeamsColumns[1]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:     "task_teams_task_id",
				Columns:    []*schema.Column{TaskTeamsColumns[0]},
				RefColumns: []*schema.Column{TasksColumns[0]},
				OnDelete:   schema.Cascade,
			},
			{
				Symbol:     "task_teams_team_id",
				Columns:    []*schema.Column{TaskTeamsColumns[1]},
				RefColumns: []*schema.Column{TeamsColumns[0]},
				OnDelete:   schema.Cascade,
			},
		},
	}
	// UserTeamsColumns holds the columns for the "user_teams" table.
	UserTeamsColumns = []*schema.Column{
		{Name: "user_id", Type: field.TypeInt},
		{Name: "team_id", Type: field.TypeInt},
	}
	// UserTeamsTable holds the schema information for the "user_teams" table.
	UserTeamsTable = &schema.Table{
		Name:       "user_teams",
		Columns:    UserTeamsColumns,
		PrimaryKey: []*schema.Column{UserTeamsColumns[0], UserTeamsColumns[1]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:     "user_teams_user_id",
				Columns:    []*schema.Column{UserTeamsColumns[0]},
				RefColumns: []*schema.Column{UsersColumns[0]},
				OnDelete:   schema.Cascade,
			},
			{
				Symbol:     "user_teams_team_id",
				Columns:    []*schema.Column{UserTeamsColumns[1]},
				RefColumns: []*schema.Column{TeamsColumns[0]},
				OnDelete:   schema.Cascade,
			},
		},
	}
	// Tables holds all the tables in the schema.
	Tables = []*schema.Table{
		TasksTable,
		TeamsTable,
		UsersTable,
		TaskTeamsTable,
		UserTeamsTable,
	}
)

Functions

func Create

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

Create creates all table resources using the given schema driver.

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)
}