## mark a section (Learn more)

# check_model_attributes_when_nil(model, required_attributes, attributes_with_error_messages = []) # {{{ # # Ensures that an instance of the specified model: # -is valid when an optional attribute is nil, # -is invalid when a required attribute is nil, # -has an error message on certain attributes when those attributes are nil # # Arguments: # -The 'model' argument must be a model class. # -The 'required_attributes' argument must be an array. # -The 'attributes_with_error_messages' argument is optional. If used, it must be an array. # # An exception is raised if an argument is invalid. # # Example call: # # The 'hashed_password' and 'salt' attributes, when nil, should not have error messages because # # instead of being specified by the application's user, they are generated by the modelinstead. # # The 'password' attribute, when nil, should have an error message because it is specified by # # the application's user, and needed for generating the hashed password. # check_model_attributes_when_nil User, [username, password, hashed_password, salt], [username, password] # def check_model_attributes_when_nil(model, required_attributes, attributes_with_error_messages = []) raise 'The 1st argument (model) must be a model class.' unless model.is_a? Class raise 'The 2nd argument (required_attributes) must an array.' unless required_attributes.is_a? Array raise 'The 3rd argument (attributes_with_error_messages) must be an array.' unless attributes_with_error_messages.is_a? Array columns_to_check = model.column_names columns_to_check.delete 'id' columns_to_check.delete 'created_at' columns_to_check.delete 'updated_at' columns_to_check.each do |attribute| describe model, "with '#{attribute}' set to nil" do before(:each) do @model_instance = Object.send "build_#{model.to_s.downcase}", {attribute => nil} @model_instance.save end if required_attributes.include? attribute it "should be invalid" do @model_instance.should_not be_valid end else it "should be valid" do @model_instance.should be_valid end end if attributes_with_error_messages.include? attribute it "should have an error message for '#{attribute}'" do @model_instance.errors[:"#{attribute}"].should_not be_nil end end # if end # End describe end # End .each end # }}}

This paste will be private.