method

build_change_column_definition

v7.1.3.4 - Show latest stable - 0 notes - Class: AbstractMysqlAdapter

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8
3.0.0
3.0.9
3.1.0
3.2.1
3.2.8
3.2.13
4.0.2
4.1.8
4.2.1
4.2.7
4.2.9
5.0.0.1
5.1.7
5.2.3
6.0.0
6.1.3.1
6.1.7.7
7.0.0
7.1.3.2 (0)
7.1.3.4 (0)
7.2.3 (0)
8.0.0 (0)
8.1.1 (0)
What's this?

build_change_column_definition(table_name, column_name, type, **options) public

This definition object contains information about the column change that would occur if the same arguments were passed to #change_column. See #change_column for information about passing a table_name, column_name, type and other options that can be passed.

Show source

# File activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb, line 408
      def build_change_column_definition(table_name, column_name, type, **options) # :nodoc:
        column = column_for(table_name, column_name)
        type ||= column.sql_type

        unless options.key?(:default)
          options[:default] = column.default
        end

        unless options.key?(:null)
          options[:null] = column.null
        end

        unless options.key?(:comment)
          options[:comment] = column.comment
        end

        if options[:collation] == :no_collation
          options.delete(:collation)
        else
          options[:collation] ||= column.collation if text_type?(type)
        end

        unless options.key?(:auto_increment)
          options[:auto_increment] = column.auto_increment?
        end

        td = create_table_definition(table_name)
        cd = td.new_column_definition(column.name, type, **options)
        ChangeColumnDefinition.new(cd, column.name)
      end

build_change_column_definition

Related methods