Refactor to pass the Codeclimate

app/controllers/api/v1/assignments_controller.rb

@@ -9,51 +9,52 @@ def index
 
       # POST /courses/:course_id/lms/:lms_id/assignments
       def create
-        assignment_name = params[:name]
-        external_assignment_id = params[:external_assignment_id]
-        course_id = params[:course_id]
-        lms_id = params[:lms_id]
+        # Check if the course_to_lms association exists
+        course_to_lms = fetch_course_to_lms(params[:course_id], params[:lms_id])
+        return unless course_to_lms
+        # Check if the assignment already exists
+        return if assignment_exists?(course_to_lms, params[:name], params[:external_assignment_id])
+        # Create and render the assignment
+        create_and_render_assignment(course_to_lms, params[:name], params[:external_assignment_id])
+      end
 
-        # Retrieve the course_to_lms entry
-        course_to_lms = CourseToLms.find_by(course_id: course_id, lms_id: lms_id)
+      def destroy
+        render json: 'not yet implemented', status: 501
+      end
+
+      private
 
+      def fetch_course_to_lms(course_id, lms_id)
+        course_to_lms = CourseToLms.find_by(course_id: course_id, lms_id: lms_id)
         unless course_to_lms
-          render json: { error: 'Course to LMS association not found' }, status: :not_found
-          return
+          render json: { error: 'No such Course_LMS association' }, status: :not_found
         end
+        course_to_lms
+      end
 
-        # Check this assignment doesn't already exist
+      def assignment_exists?(course_to_lms, assignment_name, external_assignment_id)
         existing_assignment = Assignment.find_by(course_to_lms_id: course_to_lms.id, name: assignment_name, external_assignment_id: external_assignment_id)
         if existing_assignment
-          render json: { message: 'The assignment with the specified external ID already exists.' }, status: :ok
-          return
+          render json: { message: 'Record already exists' }, status: :ok
+          return true
         end
+        false
+      end
 
-        # Create the assignment
-        assignment = Assignment.new(
-          course_to_lms_id: course_to_lms.id,
-          name: assignment_name,
-          external_assignment_id: external_assignment_id
-        )
-
+      def create_and_render_assignment(course_to_lms, assignment_name, external_assignment_id)
+        assignment = Assignment.new(course_to_lms_id: course_to_lms.id, name: assignment_name, external_assignment_id: external_assignment_id)
         if assignment.save
           render json: assignment, status: :created
         else
           render json: assignment.errors, status: :unprocessable_entity
         end
-
-      end
-
-      def destroy
-        render json: 'not yet implemented', status: 501
       end
 
       def validate_ids!
         if params[:name].blank? || params[:external_assignment_id].blank? || params[:course_id].blank? || params[:lms_id].blank?
-          render json: { error: 'Course ID, LMS ID, name, and external assignment ID are required' }, status: :bad_request
+          render json: { error: 'Params required' }, status: :bad_request
         end
       end
     end
   end
 end
-

spec/controllers/api/v1/assignments_controller_spec.rb

@@ -11,7 +11,7 @@ def json_response
       let(:mock_course_to_lms) { CourseToLms.create!(course_id: mock_course.id, lms_id: mock_lms.id) }
 
       let(:valid_params) { { name: "Test Assignment", external_assignment_id: "123ABC", course_id: mock_course.id, lms_id: mock_lms.id } }
-      
+
       before do
         mock_course
         mock_lms
@@ -46,7 +46,7 @@ def json_response
           it 'returns status :not_found' do
             post :create, params: { course_id: -1, lms_id: -1, name: "Test Assignment", external_assignment_id: "123ABC" }
             expect(response).to have_http_status(:not_found)
-            expect(response.body).to include('Course to LMS association not found')
+            expect(response.body).to include('No such Course_LMS association')
           end
         end
 
@@ -55,7 +55,7 @@ def json_response
             Assignment.create!(course_to_lms_id: mock_course_to_lms.id, name: "Test Assignment", external_assignment_id: "123ABC")
             post :create, params: valid_params
             expect(response).to have_http_status(:ok)
-            expect(response.body).to include('The assignment with the specified external ID already exists.')
+            expect(response.body).to include('Record already exists')
           end
         end