Store ID of parent project when remixing

.gitignore

@@ -33,3 +33,5 @@
 /config/master.key
 
 .rubocop-https*
+
+/coverage

app/concepts/project/operation/create_remix.rb

@@ -23,13 +23,18 @@ def validate_params(response, params, user_id)
           response[:error] = 'Invalid parameters' unless valid
         end
 
-        def remix_project(response, params, user_id)
-          original_project = Project.find_by!(identifier: params[:phrase_id])
-
-          response[:project] = original_project.dup.tap do |proj|
+        def create_remix(original_project, user_id)
+          original_project.dup.tap do |proj|
             proj.user_id = user_id
             proj.components = original_project.components.map(&:dup)
+            proj.remixed_from_id = original_project.id
           end
+        end
+
+        def remix_project(response, params, user_id)
+          original_project = Project.find_by!(identifier: params[:phrase_id])
+
+          response[:project] = create_remix(original_project, user_id)
 
           response[:error] = 'Unable to create project' unless response[:project].save
           response

app/models/project.rb

@@ -5,7 +5,9 @@
 class Project < ApplicationRecord
   before_validation :check_unique_not_null, on: :create
   validates :identifier, presence: true, uniqueness: true
+  belongs_to :parent, class_name: 'Project', foreign_key: 'remixed_from_id', optional: true, inverse_of: :children
   has_many :components, -> { order(:index) }, dependent: :destroy, inverse_of: :project
+  has_many :children, class_name: 'Project', foreign_key: 'remixed_from_id', dependent: :nullify, inverse_of: :parent
 
   private
 

app/views/api/projects/show.json.jbuilder

@@ -2,4 +2,6 @@
 
 json.call(@project, :identifier, :project_type, :name)
 
+json.parent(@project.parent, :name, :identifier) if @project.parent
+
 json.components @project.components, :id, :name, :extension, :content

db/migrate/20220228094815_associate_remixed_projects_with_their_parent_project.rb

@@ -0,0 +1,5 @@
+class AssociateRemixedProjectsWithTheirParentProject < ActiveRecord::Migration[7.0]
+  def change
+    add_reference :projects, :remixed_from, type: :uuid, references: :projects
+  end
+end

spec/models/project_spec.rb

@@ -5,6 +5,8 @@
 RSpec.describe Project, type: :model do
   describe 'associations' do
     it { is_expected.to have_many(:components) }
+    it { is_expected.to have_many(:children) }
+    it { is_expected.to belong_to(:parent).optional(true) }
   end
 
   describe 'identifier not nil' do