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module ActiveRecord::ConnectionAdapters::ColumnMethods

Public instance methods

column(name, type, **options)

Appends a column or columns of a specified type.

t.string(:goat)
t.string(:goat, :sheep)

See TableDefinition#column

Source code GitHub 
# File activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb, line 320
included do
  define_column_methods :bigint, :binary, :boolean, :date, :datetime, :decimal,
    :float, :integer, :json, :string, :text, :time, :timestamp, :virtual

  alias :blob :binary
  alias :numeric :decimal
end

primary_key(name, type = :primary_key, **options)

Appends a primary key definition to the table definition. Can be called multiple times, but this is probably not a good idea.

Source code GitHub 
# File activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb, line 305
def primary_key(name, type = :primary_key, **options)
  column(name, type, **options.merge(primary_key: true))
end

Definition files