Scope environments to project

app/helpers/gitlab_routing_helper.rb

@@ -70,6 +70,10 @@ module GitlabRoutingHelper
     namespace_project_runner_path(@project.namespace, @project, runner, *args)
   end
 
+  def environment_path(environment, *args)
+    namespace_project_environment_path(environment.project.namespace, environment.project, environment, *args)
+  end
+
   def issue_path(entity, *args)
     namespace_project_issue_path(entity.project.namespace, entity.project, entity, *args)
   end

app/models/project.rb

@@ -1304,7 +1304,7 @@ class Project < ActiveRecord::Base
         environment_ids.where(ref: ref)
       end
 
-    Environment.where(id: environment_ids).select do |environment|
+    environments.where(id: environment_ids).select do |environment|
       environment.includes_commit?(commit)
     end
   end

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

@@ -51,7 +51,7 @@
         %span.hidden-sm
           Deployed to
           = succeed '.' do
-            = link_to environment.name, namespace_project_environment_path(environment.project.namespace, environment.project, environment), class: 'environment'
+            = link_to environment.name, environment_path(environment), class: 'environment'
           - external_url = environment.external_url
           - if external_url
             = link_to external_url, target: '_blank' do

spec/views/projects/merge_requests/_heading.html.haml_spec.rb

@@ -15,6 +15,8 @@ describe 'projects/merge_requests/widget/_heading' do
       assign(:merge_request, merge_request)
       assign(:project, project)
 
+      allow(view).to receive(:can?).and_return(true)
+
       render
     end