text: // Copyright 2019-present Facebook Inc. All rights reserved.
  // This source code is licensed under the Apache 2.0 license found
  // in the LICENSE file in the root directory of this source tree.
  
  // Code generated by entc, DO NOT EDIT.
  
  package migrate
  
  import (
  	"context"
  	"fmt"
  	"io"
  
  	"github.com/facebook/ent/dialect"
  	"github.com/facebook/ent/dialect/sql/schema"
  )
  
  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
  )
  
  // Schema is the API for creating, migrating and dropping a schema.
  type Schema struct {
  	drv         dialect.Driver
  	universalID bool
  }
  
  // NewSchema creates a new schema client.
  func NewSchema(drv dialect.Driver) *Schema { return &Schema{drv: drv} }
  
  // Create creates all schema resources.
  func (s *Schema) Create(ctx context.Context, opts ...schema.MigrateOption) error {
  	migrate, err := schema.NewMigrate(s.drv, opts...)
  	if err != nil {
  		return fmt.Errorf("ent/migrate: %v", err)
  	}
  	return migrate.Create(ctx, Tables...)
  }
  
  // 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)
  // 	}
  //
  func (s *Schema) WriteTo(ctx context.Context, w io.Writer, opts ...schema.MigrateOption) error {
  	drv := &schema.WriteDriver{
  		Writer: w,
  		Driver: s.drv,
  	}
  	migrate, err := schema.NewMigrate(drv, opts...)
  	if err != nil {
  		return fmt.Errorf("ent/migrate: %v", err)
  	}
  	return migrate.Create(ctx, Tables...)
  }
  