Don't show duplicate deploy keys. Fixes #1516

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 v 7.11.0 (unreleased)
+  - Don't show duplicate deploy keys
   - Make the first branch pushed to an empty repository the default HEAD (Stan Hu)
   - Make Reply-To config apply to change e-mail confirmation and other Devise notifications (Stan Hu)
   - Add application setting to restrict user signups to e-mail domains (Stan Hu)

app/models/user.rb

@@ -438,7 +438,7 @@ class User < ActiveRecord::Base
   end
   def project_deploy_keys
-    DeployKey.in_projects(self.authorized_projects.pluck(:id))
+    DeployKey.unscoped.in_projects(self.authorized_projects.pluck(:id)).distinct(:id)
   end
   def accessible_deploy_keys

features/project/deploy_keys.feature

@@ -9,9 +9,10 @@ Feature: Project Deploy Keys
     Then I should see project deploy key
   Scenario: I should see project deploy keys
-    Given other project has deploy key
+    Given other projects have deploy keys
     When I visit project deploy keys page
-    Then I should see other project deploy key 
+    Then I should see other project deploy key
+    And I should only see the same deploy key once
   Scenario: I should see public deploy keys
     Given public deploy key exists
@@ -26,7 +27,7 @@ Feature: Project Deploy Keys
     And I should see newly created deploy key
   Scenario: I attach other project deploy key to project
-    Given other project has deploy key
+    Given other projects have deploy keys
     And I visit project deploy keys page
     When I click attach deploy key
     Then I should be on deploy keys page

features/steps/project/deploy_keys.rb

@@ -45,10 +45,20 @@ class Spinach::Features::ProjectDeployKeys < Spinach::FeatureSteps
     end
   end
-  step 'other project has deploy key' do
-    @second_project = create :project, namespace: create(:group)
+  step 'other projects have deploy keys' do
+    @second_project = create(:project, namespace: create(:group))
     @second_project.team << [current_user, :master]
     create(:deploy_keys_project, project: @second_project)
+
+    @third_project = create(:project, namespace: create(:group))
+    @third_project.team << [current_user, :master]
+    create(:deploy_keys_project, project: @third_project, deploy_key: @second_project.deploy_keys.first)
+  end
+
+  step 'I should only see the same deploy key once' do
+    within '.available-keys' do
+      page.should have_selector('ul li', count: 1)
+    end
   end
   step 'public deploy key exists' do