Module: ActiveFlag::ClassMethods

Defined in:
lib/active_flag.rb

Instance Method Summary collapse

Instance Method Details

#flag(column, keys) ⇒ Object 



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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/active_flag.rb', line 11

def flag(column, keys)
  unless respond_to?(:active_flags)
    class_attribute :active_flags
    self.active_flags = {}
  end

  raise "active_flags on :#{column} already defined!" if active_flags[column]

  self.active_flags[column] = Definition.new(column, keys, self)

  # Getter
  define_method column do
    self.class.active_flags[column].to_value(self, read_attribute(column).to_i)
  end

  # Setter
  define_method "#{column}=" do |arg|
    write_attribute column, self.class.active_flags[column].to_i(arg)
  end

  # Reference to definition
  define_singleton_method column.to_s.pluralize do
    active_flags[column]
  end

  # Scopes
  define_singleton_method "where_#{column}" do |*args|
    integer, column_name = send("_where_#{column}", *args)
    where("#{column_name} & #{integer} > 0")
  end

  define_singleton_method "where_all_#{column}" do |*args|
    integer, column_name = send("_where_#{column}", *args)
    where("#{column_name} & #{integer} = #{integer}")
  end

  define_singleton_method "where_not_#{column}" do |*args|
    integer, column_name = send("_where_#{column}", *args)
    where("#{column_name} & #{integer} = 0")
  end

  define_singleton_method "where_not_all_#{column}" do |*args|
    integer, column_name = send("_where_#{column}", *args)
    where("#{column_name} & #{integer} < #{integer}")
  end

  # utility method to extract parameters
  define_singleton_method "_where_#{column}" do |*args|
    return [
      active_flags[column].to_i(args),
      "#{connection.quote_table_name(table_name)}.#{connection.quote_column_name(column)}"
    ]
  end
end