Introduced Ci::Runner.specific_for for getting specific runners:

for a particular project.

app/controllers/projects/runners_controller.rb

@@ -7,8 +7,7 @@ class Projects::RunnersController < Projects::ApplicationController
   def index
     @runners = project.runners.ordered
     @specific_runners = current_user.ci_authorized_runners.
-      where.not(id: project.runners).
-      ordered.page(params[:page]).per(20)
+      specific_for(project).ordered.page(params[:page]).per(20)
     @shared_runners = Ci::Runner.shared.active
     @shared_runners_count = @shared_runners.count(:all)
   end

app/models/ci/runner.rb

@@ -26,6 +26,10 @@ module Ci
         .where("ci_runner_projects.gl_project_id = :project_id OR ci_runners.is_shared = true", project_id: project_id)
     end
 
+    scope :specific_for, ->(project) do
+      where(locked: false).where.not(id: project.runners).specific
+    end
+
     validate :tag_constraints
 
     acts_as_taggable

spec/models/ci/runner_spec.rb

@@ -112,6 +112,60 @@ describe Ci::Runner, models: true do
     end
   end
 
+  describe :specific_for do
+    let(:runner) { create(:ci_runner) }
+    let(:project) { create(:project) }
+    let(:another_project) { create(:project) }
+
+    before { project.runners << runner }
+
+    context 'with shared runners' do
+      before { runner.update(is_shared: true) }
+
+      context 'should not give owned runner' do
+        subject { Ci::Runner.specific_for(project) }
+
+        it { is_expected.to be_empty }
+      end
+
+      context 'should not give shared runner' do
+        subject { Ci::Runner.specific_for(another_project) }
+
+        it { is_expected.to be_empty }
+      end
+    end
+
+    context 'with unlocked runner' do
+      context 'should not give owned runner' do
+        subject { Ci::Runner.specific_for(project) }
+
+        it { is_expected.to be_empty }
+      end
+
+      context 'should give a specific runner' do
+        subject { Ci::Runner.specific_for(another_project) }
+
+        it { is_expected.to contain_exactly(runner) }
+      end
+    end
+
+    context 'with locked runner' do
+      before { runner.update(locked: true) }
+
+      context 'should not give owned runner' do
+        subject { Ci::Runner.specific_for(project) }
+
+        it { is_expected.to be_empty }
+      end
+
+      context 'should not give a locked runner' do
+        subject { Ci::Runner.specific_for(another_project) }
+
+        it { is_expected.to be_empty }
+      end
+    end
+  end
+
   describe "belongs_to_one_project?" do
     it "returns false if there are two projects runner assigned to" do
       runner = FactoryGirl.create(:ci_runner)