Default clusters namespace_per_environment to true

changelogs/unreleased/65251-default-clusters-namespace_per_environment-column-to-true.yml

+---
+title: Default clusters namespace_per_environment column to true
+merge_request: 32139
+author:
+type: other

db/migrate/20190823055948_change_clusters_namespace_per_environment_default.rb

+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class ChangeClustersNamespacePerEnvironmentDefault < ActiveRecord::Migration[5.2]
+  DOWNTIME = false
+
+  def change
+    change_column_default :clusters, :namespace_per_environment, from: false, to: true
+  end
+end

db/schema.rb

@@ -935,7 +935,7 @@ ActiveRecord::Schema.define(version: 2019_08_28_083843) do
     t.integer "cluster_type", limit: 2, default: 3, null: false
     t.string "domain"
     t.boolean "managed", default: true, null: false
-    t.boolean "namespace_per_environment", default: false, null: false
+    t.boolean "namespace_per_environment", default: true, null: false
     t.index ["enabled"], name: "index_clusters_on_enabled"
     t.index ["user_id"], name: "index_clusters_on_user_id"
   end