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 (
	// AddressesColumns holds the columns for the "addresses" table.
	AddressesColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt64, Increment: true},
		{Name: "name", Type: field.TypeString},
		{Name: "mobile", Type: field.TypeString},
		{Name: "address", Type: field.TypeString},
		{Name: "post_code", Type: field.TypeString},
		{Name: "created_at", Type: field.TypeTime, SchemaType: map[string]string{"mysql": "datetime"}},
		{Name: "updated_at", Type: field.TypeTime, SchemaType: map[string]string{"mysql": "datetime"}},
		{Name: "user_addresses", Type: field.TypeInt64, Nullable: true},
	}
	// AddressesTable holds the schema information for the "addresses" table.
	AddressesTable = &schema.Table{
		Name:       "addresses",
		Columns:    AddressesColumns,
		PrimaryKey: []*schema.Column{AddressesColumns[0]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:     "addresses_users_addresses",
				Columns:    []*schema.Column{AddressesColumns[7]},
				RefColumns: []*schema.Column{UsersColumns[0]},
				OnDelete:   schema.SetNull,
			},
		},
	}
	// CardsColumns holds the columns for the "cards" table.
	CardsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt64, Increment: true},
		{Name: "name", Type: field.TypeString},
		{Name: "card_no", Type: field.TypeString},
		{Name: "ccv", Type: field.TypeString},
		{Name: "expires", Type: field.TypeString},
		{Name: "created_at", Type: field.TypeTime, SchemaType: map[string]string{"mysql": "datetime"}},
		{Name: "updated_at", Type: field.TypeTime, SchemaType: map[string]string{"mysql": "datetime"}},
		{Name: "user_cards", Type: field.TypeInt64, Nullable: true},
	}
	// CardsTable holds the schema information for the "cards" table.
	CardsTable = &schema.Table{
		Name:       "cards",
		Columns:    CardsColumns,
		PrimaryKey: []*schema.Column{CardsColumns[0]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:     "cards_users_cards",
				Columns:    []*schema.Column{CardsColumns[7]},
				RefColumns: []*schema.Column{UsersColumns[0]},
				OnDelete:   schema.SetNull,
			},
		},
	}
	// UsersColumns holds the columns for the "users" table.
	UsersColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt64, Increment: true},
		{Name: "username", Type: field.TypeString, Unique: true},
		{Name: "password_hash", Type: field.TypeString},
		{Name: "created_at", Type: field.TypeTime, SchemaType: map[string]string{"mysql": "datetime"}},
		{Name: "updated_at", Type: field.TypeTime, SchemaType: map[string]string{"mysql": "datetime"}},
	}
	// UsersTable holds the schema information for the "users" table.
	UsersTable = &schema.Table{
		Name:       "users",
		Columns:    UsersColumns,
		PrimaryKey: []*schema.Column{UsersColumns[0]},
	}
	// Tables holds all the tables in the schema.
	Tables = []*schema.Table{
		AddressesTable,
		CardsTable,
		UsersTable,
	}
)

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)
}