You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 1_create_binda_tables.rb
    path of file: ./repos/binda/db/migrate
    
    the code of the file until where you have to start completion: class CreateBindaTables < ActiveRecord::Migration[5.0]
  def change

    create_table :binda_boards do |t|
    	t.string           :name, null: false
    	t.string           :slug
  		t.index            :slug, unique: true
    	t.integer          :position, default: 0, index: true
      t.belongs_to       :structure
    end

    create_table :binda_components do |t|
      t.string           :name, null: false
      t.string           :slug
      t.index            :slug, unique: true
      t.string           :publish_state
      t.integer          :position, default: 0, index: true
      t.belongs_to       :structure
      t.timestamps
    end

    create_table :binda_structures do |t|
      t.string           :name, null: false
      t.string           :slug
      t.integer          :position, default: 0, index: true
      t.boolean          :has_categories, default: true
      t.boolean          :has_preview, defau
    
  def change

    create_table :binda_boards do |t|
    	t.string           :name, null: false
    	t.string           :slug
  		t.index            :slug, unique: true
    	t.integer          :position, default: 0, index: true
      t.belongs_to       :structure
    end

    create_table :binda_components do |t|
      t.string           :name, null: false
      t.string           :slug
      t.index            :slug, unique: true
      t.string           :publish_state
      t.integer          :position, default: 0, index: true
      t.belongs_to       :structure
      t.timestamps
    end

    create_table :binda_structures do |t|
      t.string           :name, null: false
      t.string           :slug
      t.integer          :position, default: 0, index: true
      t.boolean          :has_categories, default: true
      t.boolean          :has_preview, default: false
      t.index            :slug, unique: true
      t.string           :instance_type, null: false, default: 'component'
      t.timestamps
    end

    create_table :binda_field_groups do |t|
      t.string           :name, null: false
      t.string           :slug
      t.index            :slug, unique: true
      t.text             :description
      t.integer          :position, default: 0, index: true
      t.string           :layout
      t.belongs_to       :structure
      t.timestamps
    end

    create_table :binda_field_settings do |t|
      t.string           :name, null: false
      t.string           :slug
      t.index            :slug, unique: true
      t.text             :description
      t.integer          :position, default: 0, index: true
      t.boolean          :required, default: false
      t.boolean          :read_only, default: false
      t.text             :default_text
      t.string           :field_type
      t.belongs_to       :field_group
      t.string           :ancestry
      t.index            :ancestry
      t.boolean          :allow_null, default: true
      t.references       :default_choice, index: true
      t.timestamps
    end

    create_table :binda_field_settings_structures do |t|
      t.belongs_to :field_setting
      t.belongs_to :structure
    end

    create_table :binda_repeaters do |t|
      t.integer          :position, default: 0, index: true
      t.belongs_to       :field_setting
      t.references       :fieldable, polymorphic: true, index: true
      t.timestamps
    end

    create_table :binda_texts do |t|
      t.text             :content
      t.integer          :position, default: 0, index: true
      t.belongs_to       :field_setting
      t.references       :fieldable, polymorphic: true, index: true
      t.string           :type
      t.timestamps
    end

     create_table :binda_galleries do |t|
      t.integer          :position, default: 0, index: true
      t.belongs_to       :field_setting
      t.references       :fieldable, polymorphic: true, index: true
      t.timestamps
    end

    create_table :binda_assets do |t|
      t.string           :type
      t.string           :video
      t.string           :image
      t.string           :audio
      t.string           :svg
      t.belongs_to       :field_setting
      t.references       :fieldable, polymorphic: true, index: true
      t.string           :content_type
      t.float            :file_size
      t.float            :file_width
      t.float            :file_height
      t.timestamps
    end

    create_table :binda_dates do |t|
      t.datetime         :date
      t.belongs_to       :field_setting
      t.references       :fieldable, polymorphic: true, index: true
      t.timestamps
    end

    create_table :binda_choices do |t|
      t.string           :label
      t.string           :value
      t.belongs_to       :field_setting
      t.timestamps
    end

    create_table :binda_choices_selections do |t|
      t.belongs_to :choice, index: true
      t.belongs_to :selection, index: true
      t.timestamps
    end

    create_table :binda_selections do |t|
      t.belongs_to       :field_setting
      t.references       :fieldable, polymorphic: true, index: true
      t.string           :type
      t.timestamps
    end

    create_table :binda_categories do |t|
      t.string           :name, null: false
      t.string           :slug
      t.index            :slug, unique: true
      t.belongs_to       :structure
      t.integer          :position, default: 0, index: true
      t.text             :description
      t.timestamps
    end

    create_table :binda_categories_components, id: false do |t|
      t.belongs_to       :category, index: true
      t.belongs_to       :component, index: true
    end

    create_table :binda_relations do |t|
      t.integer          :field_setting_id
      t.references       :fieldable, polymorphic: true, index: true
    end

    create_table :binda_relation_links do |t|
      t.references       :owner, polymorphic: true, index: true
      t.references       :dependent, polymorphic: true, index: true
      t.timestamps
    end

    create_table :friendly_id_slugs do |t|
      t.string           :slug,           :null => false
      t.integer          :sluggable_id,   :null => false
      t.string           :sluggable_type, :limit => 50
      t.string           :scope
      t.datetime         :created_at
    end

    add_index :friendly_id_slugs, :sluggable_id
    add_index :friendly_id_slugs, [:slug, :sluggable_type]
    add_index :friendly_id_slugs, [:slug, :sluggable_type, :scope], :unique => true
    add_index :friendly_id_slugs, :sluggable_type

    # DEVISE
    create_table :binda_users do |t|
      ## Database authenticatable
      t.string :email,              null: false, default: ""
      t.string :encrypted_password, null: false, default: ""

      ## Recoverable
      t.string   :reset_password_token
      t.datetime :reset_password_sent_at

      ## Rememberable
      t.datetime :remember_created_at

      ## Trackable
      t.integer  :sign_in_count, default: 0, null: false
      t.datetime :current_sign_in_at
      t.datetime :last_sign_in_at
      t.string   :current_sign_in_ip
      t.string   :last_sign_in_ip

      ## Confirmable
      t.string   :confirmation_token
      t.datetime :confirmed_at
      t.datetime :confirmation_sent_at
      t.string   :unconfirmed_email # Only if using reconfirmable

      ## Lockable
      t.integer  :failed_attempts, default: 0, null: false # Only if lock strategy is :failed_attempts
      t.string   :unlock_token # Only if unlock strategy is :email or :both
      t.datetime :locked_at

      ## Custom Binda setup
      t.boolean :is_superadmin, default: false

      t.timestamps null: false
    end

    add_index :binda_users, :email,                unique: true
    add_index :binda_users, :reset_password_token, unique: true
    add_index :binda_users, :confirmation_token,   unique: true
    add_index :binda_users, :unlock_token,         unique: true

  end