Define primary_key method on class generated by mock_model("WithAString").

- Closes rspec#435.

Author: dchelimsky

Changelog.md

@@ -18,6 +18,8 @@
     fixure_file_upload reads from ActiveSupport::TestCase.fixture_path and misses
     RSpec's configuration (David Chelimsky)
   * Support nested resource in view spec generator (David Chelimsky)
+  * Define `primary_key` on class generated by mock_model("WithAString") (David
+    Chelimsky)
 
 ### 2.6.1 / 2011-05-25
 

lib/rspec/rails/mocks.rb

@@ -63,6 +63,7 @@ def mock_model(string_or_model_class, stubs = {})
           else
             model_class = Object.const_set(string_or_model_class, Class.new do
               extend ActiveModel::Naming
+              def self.primary_key; :id; end
             end)
           end
         else

spec/rspec/rails/mocks/mock_model_spec.rb

@@ -101,6 +101,22 @@
     end
   end
 
+  describe "as association that doesn't exist yet" do
+    before(:each) do
+      @real = AssociatedModel.create!
+      @mock_model = mock_model("Other")
+      @real.nonexistent_model = @mock_model
+    end
+
+    it "passes: associated_model == mock" do
+      @mock_model.should == @real.nonexistent_model
+    end
+
+    it "passes: mock == associated_model" do
+      @real.nonexistent_model.should == @mock_model
+    end
+  end
+
   describe "#is_a?" do
     before(:each) do
       @model = mock_model(SubMockableModel)

spec/support/ar_classes.rb

@@ -30,6 +30,7 @@ class SubMockableModel < MockableModel
 class AssociatedModel < ActiveRecord::Base
   extend Connections
   belongs_to :mockable_model
+  belongs_to :nonexistent_model, :class_name => "Other"
 end
 
 class AlternatePrimaryKeyModel < ActiveRecord::Base