has_many target is not exported correctly (issue #165) + fix the import function as well

doc/changelogs/20110812.txt

@@ -6,3 +6,4 @@
 - Adding indexes for pages to avoid "Mongo::OperationFailure: too much data" errors (#159)
 - better spanish translations (#161, #162)
 - fix carrierwave version to 0.5.6 (#163)
+- has_many target is not exported correctly (issue #165) + fix the import module as well

features/admin/content_types/has_many.feature

@@ -44,10 +44,3 @@ Scenario: I add a project to a client
   And I wait until the has many selector is visible
   Then I should see "Fun project" within the list of added items
   And "Fun project" should not be an option for "label"
-  #
-  # And I should not see "Empty" within the list of items
-  # When I go to the "Clients" model list page
-  # And I follow "Beta, Inc"
-  # And I wait until the has many selector is visible
-  # Then I should see "Fun project" within the list of added items
-  # And I should not see "Empty" within the list of items

lib/locomotive/export.rb

@@ -112,9 +112,19 @@ module Locomotive
         # custom_fields
         fields = []
         content_type.content_custom_fields.each do |field|
-          fields << {
-            field._alias => self.extract_attributes(field, %w(label kind hint target required))
-          }
+          field_attributes = self.extract_attributes(field, %w(label kind hint required))
+
+          if field.target.present?
+            target_klass = field['target'].constantize
+
+            field_attributes['target'] = target_klass._parent.slug
+
+            if field['reverse_lookup'].present?
+              field_attributes['reverse'] = target_klass.custom_field_name_to_alias(field['reverse_lookup'])
+            end
+          end
+
+          fields << { field._alias => field_attributes }
         end
 
         attributes['fields'] = fields
@@ -284,9 +294,11 @@ module Locomotive
           when 'text'
             self.replace_asset_urls_in(content.send(field._name.to_sym) || '')
           when 'has_one'
-            content.send(field.safe_alias.to_sym).highlighted_field_value
+            content.send(field.safe_alias.to_sym).highlighted_field_value rescue nil # no bound object
           when 'has_many'
+            unless field.reverse_has_many?
               content.send(field.safe_alias.to_sym).collect(&:highlighted_field_value)
+            end
           else
             content.send(field.safe_alias.to_sym)
           end)

lib/locomotive/import/content_types.rb

@@ -78,6 +78,8 @@ module Locomotive
         fields.each_with_index do |data, position|
           name, data = data.keys.first, data.values.first
 
+          reverse_lookup = data.delete('reverse')
+
           attributes = { :_alias => name, :label => name.humanize, :kind => 'string', :position => position }.merge(data).symbolize_keys
 
           field = content_type.content_custom_fields.detect { |f| f._alias == attributes[:_alias] }
@@ -88,7 +90,9 @@ module Locomotive
 
           field.attributes = attributes
 
-          field[:kind] = field[:kind].downcase # old versions of the kind are capitalized
+          field[:kind] = field[:kind].downcase # old versions of the kind field are capitalized
+
+          field[:tmp_reverse_lookup] = reverse_lookup # use the ability in mongoid to set free attributes on the fly
         end
       end
 
@@ -97,9 +101,16 @@ module Locomotive
           content_type.content_custom_fields.each do |field|
             next unless ['has_many', 'has_one'].include?(field.kind)
 
-            target_content_type = site.content_types.where(:name => field.target).first
+            target_content_type = site.content_types.where(:slug => field.target).first
 
-            field.target = target_content_type.content_klass.to_s if target_content_type
+            if target_content_type
+              field.target = target_content_type.content_klass.to_s
+
+              if field[:tmp_reverse_lookup]
+                field.reverse_lookup = field[:tmp_reverse_lookup]
+                field.reverse_lookup = field.safe_reverse_lookup # make sure we store the true value
+              end
+            end
           end
 
           content_type.save

spec/lib/locomotive/import_spec.rb

@@ -30,6 +30,13 @@ describe Locomotive::Import::Job do
       content_type.content_custom_fields.size.should == 9
     end
 
+    it 'replaces the target and the reverse_lookup values by the correct ones in a has_many relationship' do
+      content_type = @site.content_types.where(:slug => 'clients').first
+      field = content_type.content_custom_fields.last
+      field.target.should match /^ContentContentType/
+      field.reverse_lookup.should == 'custom_field_8'
+    end
+
     it 'correctly imports content type names' do
       content_type = @site.content_types.where(:slug => 'projects').first
       content_type.name.should == 'My projects'