Use respond_to? to check if reference responds to writer when using r…

…epresents

CHANGELOG.md

@@ -1,5 +1,9 @@
 # master (not released yet)
 
+# Version 0.9.7
+
+* fix `represents` to skip not defined attributes on the reference
+
 # Version 0.9.6
 
 * fix gemspec to include `config` directory

lib/granite/represents/attribute.rb

@@ -11,9 +11,7 @@ def initialize(*_args)
       end
 
       def sync
-        return if reference.nil?
-
-        reference.public_send(writer, read)
+        reference.public_send(writer, read) if reference.respond_to?(writer)
       end
 
       def typecast(value)

lib/granite/version.rb

@@ -1,3 +1,3 @@
 module Granite
-  VERSION = '0.9.6'.freeze
+  VERSION = '0.9.7'.freeze
 end

spec/lib/granite/represents/attribute_spec.rb

@@ -71,7 +71,7 @@ def user
       expect { subject.sync }.to change { action.user.sign_in_count }.from(1).to(2)
     end
 
-    context 'when represents attribute of nil' do
+    context 'when represented object does not respond to attribute name' do
       before do
         stub_class(:action, Granite::Action) do
           allow_if { true }
@@ -80,6 +80,7 @@ def user
           represents :related_ids, of: :user
 
           def user
+            Object.new
           end
         end
       end