Makes production environment the default environment for a project

app/controllers/projects/environments_controller.rb

@@ -121,7 +121,7 @@ class Projects::EnvironmentsController < Projects::ApplicationController
   end
   def metrics_redirect
-    environment = project.environments.with_state(:available).first
+    environment = project.default_environment
     if environment
       redirect_to environment_metrics_path(environment)

app/models/project.rb

@@ -1774,6 +1774,15 @@ class Project < ActiveRecord::Base
     end
   end
+  def default_environment
+    production_first = "(CASE WHEN name = 'production' THEN 0 ELSE 1 END), id ASC"
+
+    environments
+      .with_state(:available)
+      .reorder(production_first)
+      .first
+  end
+
   def secret_variables_for(ref:, environment: nil)
     # EE would use the environment
     if protected_for?(ref)

spec/models/project_spec.rb

@@ -2292,6 +2292,28 @@ describe Project do
     end
   end
+  describe '#default_environment' do
+    let(:project) { create(:project) }
+
+    it 'returns production environment when it exists' do
+      production = create(:environment, name: "production", project: project)
+      create(:environment, name: 'staging', project: project)
+
+      expect(project.default_environment).to eq(production)
+    end
+
+    it 'returns first environment when no production environment exists' do
+      create(:environment, name: 'staging', project: project)
+      create(:environment, name: 'foo', project: project)
+
+      expect(project.default_environment).to eq(project.environments.first)
+    end
+
+    it 'returns nil when no available environment exists' do
+      expect(project.default_environment).to be_nil
+    end
+  end
+
   describe '#secret_variables_for' do
     let(:project) { create(:project) }