Module: Resourceful

Defined in:
lib/resourceful/version.rb,
lib/resourceful/model/xml.rb,
lib/resourceful/agent/base.rb,
lib/resourceful/exceptions.rb,
lib/resourceful/extensions.rb,
lib/resourceful/model/base.rb,
lib/resourceful/model/json.rb,
lib/resourceful/model/findable.rb,
lib/resourceful/resource/cache.rb,
lib/resourceful/agent/mechanize.rb,
lib/resourceful/resource/format.rb,
lib/resourceful/model/eager_load.rb,
lib/resourceful/agent/rest_client.rb,
lib/resourceful/shoulda/test_unit.rb,
lib/resourceful/model/attribute_types.rb,
lib/resourceful/model/embedded_associations.rb,
lib/resourceful/model/external_associations.rb,
lib/resourceful/model/activerecord_associations.rb

Defined Under Namespace

Modules: Agent, Exceptions, Extensions, Model, Resource, Shoulda, Version

Class Method Summary collapse

Class Method Details

.add_to_associations(klass_name, name, data) ⇒ Object 



37
38
39
40
41
 
# File 'lib/resourceful/model/eager_load.rb', line 37

def self.add_to_associations(klass_name, name, data)
  @@resourceful_associations ||= {}
  @@resourceful_associations[klass_name] ||= {}
  @@resourceful_associations[klass_name][name] = data
end

.eager_load(collection, associations) ⇒ Object

The idea here is to take a collection of object instances that have resourceful associations and

> for each association specified

=> get the foreign key name
=> get the foreign key values for each item in the collection
=> grab the data for all the foreign keys in one call
=> build object for each result in data
=> for each item in the collection, set it's association value from built objects



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
 
# File 'lib/resourceful/model/eager_load.rb', line 10

def self.eager_load(collection, associations)
  if (collection.respond_to?('each') && (collection.respond_to?('empty?') && !collection.empty?)) && \
     (associations.respond_to?('each') && (associations.respond_to?('empty?') && !associations.empty?))
    klass = collection.first.class
    associations.each do |association_name|
      clean_association_name = Resourceful::Model::Base.cleanup_name(association_name.to_s)
      assoc_data = get_association_data(klass, clean_association_name)
      assoc_klass = if klass.ancestors.include?(Resourceful::Model::Base)
        klass.get_namespaced_klass(assoc_data[:class_name])
      else
        if assoc_data[:class_name].kind_of?(::String)
          assoc_data[:class_name].resourceful_constantize
        else
          assoc_data[:class_name]
        end
      end
      fk_values = collection.inject([]) {|vals, item| vals << item.send(assoc_data[:foreign_key_method])}
      fk_results = assoc_klass.send(assoc_data[:find_method_name], :all, {assoc_data[:foreign_key_name] => fk_values}, true)
      collection.each do |item|
        item_results = fk_results.reject{|result| result.send(assoc_data[:foreign_key_name]) != item.send(assoc_data[:foreign_key_method])}
        item.instance_variable_set("@#{clean_association_name}", [:belongs_to, :has_one].include?(assoc_data[:type]) ? item_results.first : item_results)
      end
    end
  end
  collection
end

.get_association_data(klass, name) ⇒ Object 



42
43
44
45
46
47
48
49
 
# File 'lib/resourceful/model/eager_load.rb', line 42

def self.get_association_data(klass, name)
  @@resourceful_associations ||= {}
  assoc_data = nil
  klass.ancestors.each do |anc|
    break if @@resourceful_associations[anc.to_s] && (assoc_data = @@resourceful_associations[anc.to_s][name])
  end
  assoc_data
end