Change

app/controllers/pull_requests_controller.rb

@@ -29,7 +29,8 @@ class PullRequestsController < ApplicationController
     @projects_names = [{
       project_user_login: @user.try(:login),
       project_name: "#{@user.try(:show_real_name)}/#{@repository.try(:identifier)}",
-      project_id: @project.identifier
+      project_id: @project.identifier,
+      id: @project.id
     }]
     @merge_projects = @projects_names
     fork_project = @project.fork_project if @is_fork
@@ -37,7 +38,8 @@ class PullRequestsController < ApplicationController
       @merge_projects.push({
         project_user_login: fork_project.owner.try(:login),
         project_name: "#{fork_project.owner.try(:show_real_name)}/#{fork_project.repository.try(:identifier)}",
-        project_id: fork_project.identifier
+        project_id: fork_project.identifier,
+        id: fork_project.id
       })
     end
   end

app/views/pull_requests/new.json.jbuilder

@@ -1,5 +1,6 @@
 json.partial! "commons/success"
 json.project_id @project.identifier
+json.id @project.id
 json.branches @all_branches
 json.is_fork @is_fork
 json.projects_names @projects_names