Module: ActiveHash::Associations::ActiveRecordExtensions

Defined in:
lib/associations/associations.rb

Instance Method Summary collapse

Instance Method Details

#belongs_to(*args) ⇒ Object



6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
# File 'lib/associations/associations.rb', line 6

def belongs_to(*args)
  our_args = args.dup
  options = our_args.extract_options!
  name = our_args.shift
  options = {:class_name => name.to_s.camelize }.merge(options)
  klass =
    begin
      options[:class_name].constantize
    rescue
      nil
    rescue LoadError
      nil
    end
  if klass && klass < ActiveHash::Base
    belongs_to_active_hash(name, options)
  else
    super
  end
end

#belongs_to_active_hash(association_id, options = {}) ⇒ Object



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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
# File 'lib/associations/associations.rb', line 26

def belongs_to_active_hash(association_id, options = {})
  options = {
    :class_name => association_id.to_s.camelize,
    :foreign_key => association_id.to_s.foreign_key,
    :shortcuts => []
  }.merge(options)
  # Define default primary_key with provided class_name if any
  options[:primary_key] ||= options[:class_name].constantize.primary_key
  options[:shortcuts] = [options[:shortcuts]] unless options[:shortcuts].kind_of?(Array)

  define_method(association_id) do
    options[:class_name].constantize.send("find_by_#{options[:primary_key]}", send(options[:foreign_key]))
  end

  define_method("#{association_id}=") do |new_value|
    send "#{options[:foreign_key]}=", new_value ? new_value.send(options[:primary_key]) : nil
  end

  options[:shortcuts].each do |shortcut|
    define_method("#{association_id}_#{shortcut}") do
      send(association_id).try(shortcut)
    end

    define_method("#{association_id}_#{shortcut}=") do |new_value|
      send "#{association_id}=", new_value ? options[:class_name].constantize.send("find_by_#{shortcut}", new_value) : nil
    end
  end

  if ActiveRecord::Reflection.respond_to?(:create)
    reflection = ActiveRecord::Reflection.create(
      :belongs_to,
      association_id.to_sym,
      nil,
      options,
      self
    )

    ActiveRecord::Reflection.add_reflection(
      self,
      association_id.to_sym,
      reflection
    )
  else
    method = ActiveRecord::Base.method(:create_reflection)
    if method.respond_to?(:parameters) && method.parameters.length == 5
      create_reflection(
        :belongs_to,
        association_id.to_sym,
        nil,
        options,
        self
      )
    else
      create_reflection(
        :belongs_to,
        association_id.to_sym,
        options,
        options[:class_name].constantize
      )
    end
  end
end