class TableDefinition

Ruby on Rails 4.2.9

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

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Represents the schema of an SQL table in an abstract way. This class provides methods for manipulating the schema representation.

Inside migration files, the t object in create_table is actually of this type:

class SomeMigration < ActiveRecord::Migration
  def up
    create_table :foo do |t|
      puts t.class  # => "ActiveRecord::ConnectionAdapters::TableDefinition"
    end
  end

  def down
    ...
  end
end

The table definitions The Columns are stored as a ColumnDefinition in the columns attribute.

Inherits from

Object

Attributes

Methods (defined here)

Private methods (3)

Show private methods Implementation detail — not part of the public API.

Used by

Subclasses (1)

ActiveRecord::ConnectionAdapters::PostgreSQL::TableDefinition

Methods (inherited)

From Object (23)