Fix external issue trackers redirect

app/controllers/projects/issues_controller.rb

@@ -266,7 +266,7 @@ class Projects::IssuesController < Projects::ApplicationController
     if action_name == 'new'
       redirect_to external.new_issue_path
     else
-      redirect_to external.project_path
+      redirect_to external.issue_tracker_path
     end
   end

app/models/project_services/gitlab_issue_tracker_service.rb

@@ -23,7 +23,7 @@ class GitlabIssueTrackerService < IssueTrackerService
     project_issue_url(project, id: iid)
   end
-  def project_path
+  def issue_tracker_path
     project_issues_path(project)
   end

app/models/project_services/issue_tracker_service.rb

@@ -20,8 +20,8 @@ class IssueTrackerService < Service
     self.issues_url.gsub(':id', iid.to_s)
   end
-  def project_path
-    read_attribute(:project_url)
+  def issue_tracker_path
+    project_url
   end
   def new_issue_path

spec/controllers/projects/issues_controller_spec.rb

@@ -7,14 +7,16 @@ describe Projects::IssuesController do
   describe "GET #index" do
     context 'external issue tracker' do
+      let!(:service) do
+        create(:custom_issue_tracker_service, project: project, title: 'Custom Issue Tracker', project_url: 'http://test.com')
+      end
+
       it 'redirects to the external issue tracker' do
-        external = double(project_path: 'https://example.com/project')
-        allow(project).to receive(:external_issue_tracker).and_return(external)
         controller.instance_variable_set(:@project, project)
         get :index, namespace_id: project.namespace, project_id: project
-        expect(response).to redirect_to('https://example.com/project')
+        expect(response).to redirect_to(service.issue_tracker_path)
       end
     end
@@ -139,19 +141,21 @@ describe Projects::IssuesController do
     end
     context 'external issue tracker' do
+      let!(:service) do
+        create(:custom_issue_tracker_service, project: project, title: 'Custom Issue Tracker', new_issue_url: 'http://test.com')
+      end
+
       before do
         sign_in(user)
         project.team << [user, :developer]
       end
       it 'redirects to the external issue tracker' do
-        external = double(new_issue_path: 'https://example.com/issues/new')
-        allow(project).to receive(:external_issue_tracker).and_return(external)
         controller.instance_variable_set(:@project, project)
         get :new, namespace_id: project.namespace, project_id: project
-        expect(response).to redirect_to('https://example.com/issues/new')
+        expect(response).to redirect_to('http://test.com')
       end
     end
   end

spec/models/project_services/gitlab_issue_tracker_service_spec.rb

@@ -43,7 +43,7 @@ describe GitlabIssueTrackerService, models: true do
       end
       it 'gives the correct path' do
-        expect(service.project_path).to eq("/gitlab/root/#{project.path_with_namespace}/issues")
+        expect(service.issue_tracker_path).to eq("/gitlab/root/#{project.path_with_namespace}/issues")
         expect(service.new_issue_path).to eq("/gitlab/root/#{project.path_with_namespace}/issues/new")
         expect(service.issue_path(432)).to eq("/gitlab/root/#{project.path_with_namespace}/issues/432")
       end