should still able to set other reflection successfully

lib/polymorphic_integer_type/polymorphic_foreign_association_extension.rb

@@ -3,7 +3,7 @@ module PolymorphicForeignAssociationExtension
 
     def set_owner_attributes(record)
       super
-      if reflection.foreign_integer_type && reflection.integer_type
+      if reflection.try(:foreign_integer_type) && reflection.try(:integer_type)
         record._write_attribute(reflection.foreign_integer_type, reflection.integer_type)
       end
     end

spec/polymorphic_integer_type_spec.rb

@@ -371,4 +371,13 @@ class InlineDrink2 < ActiveRecord::Base
       expect(link.normal_target_type).to eq("InlineDrink2")
     end
   end
+
+  context "when using other reflection" do
+    it "owner able to set up ActiveRecord::Reflection::ThroughReflection successfully" do
+      profile_history = ProfileHistory.new
+      owner.profile_histories << profile_history
+
+      expect(owner.profile_histories).to eq([profile_history])
+    end
+  end
 end

spec/spec_helper.rb

@@ -10,6 +10,8 @@
 require 'support/person'
 require 'support/food'
 require 'support/drink'
+require 'support/profile'
+require 'support/profile_history'
 require 'support/namespaced_activity'
 require 'byebug'
 require 'pry'

spec/support/migrations/8_create_profile_table.rb

@@ -0,0 +1,16 @@
+class CreateProfileTable < ActiveRecord::Migration[5.0]
+
+  def up
+    create_table :profiles do |t|
+      t.integer :person_id
+      t.integer :profile_history_id
+    end
+  end
+
+  def down
+    drop_table :profiles
+  end
+
+end
+
+

spec/support/migrations/9_create_profile_history_table.rb

@@ -0,0 +1,14 @@
+class CreateProfileHistoryTable < ActiveRecord::Migration[5.0]
+
+  def up
+    create_table :profile_histories do |t|
+    end
+  end
+
+  def down
+    drop_table :profile_histories
+  end
+
+end
+
+

spec/support/person.rb

@@ -5,4 +5,6 @@ class Person < ActiveRecord::Base
   has_many :source_links, as: :source, integer_type: true, class_name: "Link"
 
   has_many :pet_source_links, class_name: "Link", through: :pets, source: :source_links
+  has_many :profiles
+  has_many :profile_histories, class_name: "ProfileHistory", through: :profiles
 end

spec/support/profile.rb

@@ -0,0 +1,4 @@
+class Profile < ActiveRecord::Base
+  belongs_to :person
+  belongs_to :profile_history
+end

spec/support/profile_history.rb

@@ -0,0 +1,3 @@
+class ProfileHistory < ActiveRecord::Base
+  has_many :profiles
+end