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 (
	// KeyboardsColumns holds the columns for the "keyboards" table.
	KeyboardsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt64, Increment: true},
		{Name: "name", Type: field.TypeString},
		{Name: "price", Type: field.TypeInt64},
		{Name: "discount", Type: field.TypeInt64, Nullable: true},
		{Name: "keyboard_switches", Type: field.TypeInt64},
		{Name: "keyboard_keycaps", Type: field.TypeInt64},
	}
	// KeyboardsTable holds the schema information for the "keyboards" table.
	KeyboardsTable = &schema.Table{
		Name:       "keyboards",
		Columns:    KeyboardsColumns,
		PrimaryKey: []*schema.Column{KeyboardsColumns[0]},
		ForeignKeys: []*schema.ForeignKey{
			{
				Symbol:     "keyboards_switch_models_switches",
				Columns:    []*schema.Column{KeyboardsColumns[4]},
				RefColumns: []*schema.Column{SwitchModelsColumns[0]},
				OnDelete:   schema.NoAction,
			},
			{
				Symbol:     "keyboards_keycap_models_keycaps",
				Columns:    []*schema.Column{KeyboardsColumns[5]},
				RefColumns: []*schema.Column{KeycapModelsColumns[0]},
				OnDelete:   schema.NoAction,
			},
		},
	}
	// KeycapModelsColumns holds the columns for the "keycap_models" table.
	KeycapModelsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt64, Increment: true},
		{Name: "name", Type: field.TypeString},
		{Name: "profile", Type: field.TypeString},
		{Name: "material", Type: field.TypeEnum, Enums: []string{"ABS", "PBT"}},
	}
	// KeycapModelsTable holds the schema information for the "keycap_models" table.
	KeycapModelsTable = &schema.Table{
		Name:       "keycap_models",
		Columns:    KeycapModelsColumns,
		PrimaryKey: []*schema.Column{KeycapModelsColumns[0]},
	}
	// SwitchModelsColumns holds the columns for the "switch_models" table.
	SwitchModelsColumns = []*schema.Column{
		{Name: "id", Type: field.TypeInt64, Increment: true},
		{Name: "name", Type: field.TypeString},
		{Name: "switch_type", Type: field.TypeEnum, Enums: []string{"mechanical", "optical", "electrocapacitive"}},
	}
	// SwitchModelsTable holds the schema information for the "switch_models" table.
	SwitchModelsTable = &schema.Table{
		Name:       "switch_models",
		Columns:    SwitchModelsColumns,
		PrimaryKey: []*schema.Column{SwitchModelsColumns[0]},
	}
	// Tables holds all the tables in the schema.
	Tables = []*schema.Table{
		KeyboardsTable,
		KeycapModelsTable,
		SwitchModelsTable,
	}
)

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)
}