Fixed MR handling when GitLab CI project is not present

app/models/project_services/gitlab_ci_service.rb

@@ -46,7 +46,9 @@ class GitlabCiService < CiService
     end
 
     ci_project = Ci::Project.find_by(gitlab_id: project.id)
-    Ci::CreateCommitService.new.execute(ci_project, data)
+    if ci_project
+      Ci::CreateCommitService.new.execute(ci_project, data)
+    end
   end
 
   def get_ci_commit(sha, ref)
@@ -85,7 +87,9 @@ class GitlabCiService < CiService
   end
 
   def build_page(sha, ref)
-    Ci::RoutesHelper.ci_project_ref_commits_path(project.gitlab_ci_project, ref, sha)
+    if project.gitlab_ci_project.present?
+      Ci::RoutesHelper.ci_project_ref_commits_path(project.gitlab_ci_project, ref, sha)
+    end
   end
 
   def title

app/views/projects/merge_requests/widget/_heading.html.haml

@@ -10,7 +10,8 @@
         %span CI build #{status}
         for #{@merge_request.last_commit_short_sha}.
         %span.ci-coverage
-        = link_to "View build details", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
+        - if ci_build_details_path(@merge_request)
+          = link_to "View build details", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
 
     .ci_widget
       = icon("spinner spin")