Module: ActiveRecord::Acts::List::ColumnMethodDefiner

Defined in:
lib/acts_as_list/active_record/acts/column_method_definer.rb

Overview

:nodoc:

Class Method Summary collapse

Class Method Details

.call(caller_class, column) ⇒ Object 



2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
 
# File 'lib/acts_as_list/active_record/acts/column_method_definer.rb', line 2

def self.call(caller_class, column)
  caller_class.class_eval do
    attr_reader :position_changed

    define_method :position_column do
      column
    end

    define_method :"#{column}=" do |position|
      write_attribute(column, position)
      @position_changed = true
    end

    # only add to attr_accessible
    # if the class has some mass_assignment_protection
    if defined?(accessible_attributes) and !accessible_attributes.blank?
      attr_accessible :"#{column}"
    end

    define_singleton_method :quoted_position_column do
      @_quoted_position_column ||= connection.quote_column_name(column)
    end

    define_singleton_method :quoted_position_column_with_table_name do
      @_quoted_position_column_with_table_name ||= "#{caller_class.quoted_table_name}.#{quoted_position_column}"
    end

    define_singleton_method :decrement_all do
      update_all_with_touch "#{quoted_position_column} = (#{quoted_position_column_with_table_name} - 1)"
    end

    define_singleton_method :increment_all do
      update_all_with_touch "#{quoted_position_column} = (#{quoted_position_column_with_table_name} + 1)"
    end

    define_singleton_method :update_all_with_touch do |updates|
      record = new
      attrs = record.send(:timestamp_attributes_for_update_in_model)
      now = record.send(:current_time_from_proper_timezone)

      attrs.each do |attr|
        updates << ", #{connection.quote_column_name(attr)} = #{connection.quote(connection.quoted_date(now))}"
      end

      update_all(updates)
    end
  end
end