Work out the custom field parent

lib/capsule_crm/custom_field.rb

@@ -24,6 +24,8 @@ class CustomField
     validates :label, presence: true
 
     belongs_to :party, class_name: 'CapsuleCRM::Party'
+    belongs_to :opportunity, class_name: 'CapsuleCRM::Opportunity'
+    belongs_to :kase, class_name: 'CapsuleCRM::Case'
 
     def self._for_party(party_id)
       init_collection(
@@ -65,12 +67,14 @@ def save!
     def destroy
     end
 
-    def to_capsule_json
-      { 'customFields' => serializer.serialize }
-    end
-
     private
 
+    def parent
+      self.class.belongs_to_associations.each do |association|
+        return self.send(assocation) unless self.send(association).blank?
+      end
+    end
+
     def update_record
       CapsuleCRM::Connection.post(
         "/api/party/#{party.id}/customfields", to_capsule_json

lib/capsule_crm/serializer.rb

@@ -8,16 +8,33 @@ def initialize(object, options = {})
     end
 
     def serialize
-      @serialized ||= { root => build_attributes_hash }.stringify_keys
+      @serialized ||=
+        if object.is_a?(Array)
+          serialize_collection
+        else
+          serialize_single
+        end
     end
 
     def root
       @root ||= options[:root] ||
         object.class.to_s.demodulize.downcase.singularize.camelize(:lower)
     end
 
+    def collection_root
+      @collection_root ||= options[:collection_root] || root.pluralize
+    end
+
     private
 
+    def serialize_single
+      { root => build_attributes_hash }.stringify_keys
+    end
+
+    def serialize_collection
+      { collection_root => serialize_single }.stringify_keys
+    end
+
     def additional_methods
       @additional_methods ||= options[:additional_methods] || []
     end

spec/lib/capsule_crm/custom_field_spec.rb

@@ -71,11 +71,7 @@
     end
 
     it 'should have a root element of "customField"' do
-      expect(subject.keys.first).to eql('customFields')
-    end
-
-    it 'should have an element named "customField"' do
-      expect(subject['customFields'].keys.first).to eql('customField')
+      expect(subject.keys.first).to eql('customField')
     end
   end
 end