Fix and optimise DB schema

db/migrate/20180319190020_create_deploy_tokens.rb

@@ -3,14 +3,15 @@ class CreateDeployTokens < ActiveRecord::Migration
 
   def change
     create_table :deploy_tokens do |t|
-      t.string :name, null: false
-      t.string :token, index: { unique: true }, null: false
-      t.boolean :read_repository, default: false
-      t.boolean :read_registry, default: false
       t.boolean :revoked, default: false
-      t.datetime :expires_at
+      t.boolean :read_repository, null: false, default: false
+      t.boolean :read_registry, null: false, default: false
 
+      t.datetime :expires_at
       t.timestamps null: false
+
+      t.string :name, null: false
+      t.string :token, index: { unique: true }, null: false
     end
   end
 end

db/migrate/20180405142733_create_project_deploy_tokens.rb

@@ -3,22 +3,17 @@ class CreateProjectDeployTokens < ActiveRecord::Migration
 
   DOWNTIME = false
 
-  disable_ddl_transaction!
-
-  def up
+  def change
     create_table :project_deploy_tokens do |t|
       t.integer :project_id, null: false
       t.integer :deploy_token_id, null: false
 
+      t.foreign_key :deploy_tokens, column: :deploy_token_id, on_delete: :cascade
+      t.foreign_key :projects, column: :project_id, on_delete: :cascade
+
       t.timestamps null: false
     end
 
-    add_concurrent_index :project_deploy_tokens, [:project_id, :deploy_token_id]
-  end
-
-  def down
-    drop_table :project_deploy_tokens
-
-    remove_index :project_deploy_tokens, column: [:project_id, :deploy_token_id] if index_exists?(:project_deploy_tokens, [:project_id, :deploy_token_id])
+    add_index :project_deploy_tokens, [:project_id, :deploy_token_id], unique: true
   end
 end

db/schema.rb

@@ -684,14 +684,14 @@ ActiveRecord::Schema.define(version: 20180405142733) do
   add_index "deploy_keys_projects", ["project_id"], name: "index_deploy_keys_projects_on_project_id", using: :btree
 
   create_table "deploy_tokens", force: :cascade do |t|
-    t.string "name", null: false
-    t.string "token", null: false
-    t.boolean "read_repository", default: false
-    t.boolean "read_registry", default: false
     t.boolean "revoked", default: false
+    t.boolean "read_repository", default: false, null: false
+    t.boolean "read_registry", default: false, null: false
     t.datetime "expires_at"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.string "name", null: false
+    t.string "token", null: false
   end
 
   add_index "deploy_tokens", ["token"], name: "index_deploy_tokens_on_token", unique: true, using: :btree
@@ -1450,7 +1450,7 @@ ActiveRecord::Schema.define(version: 20180405142733) do
     t.datetime "updated_at", null: false
   end
 
-  add_index "project_deploy_tokens", ["project_id", "deploy_token_id"], name: "index_project_deploy_tokens_on_project_id_and_deploy_token_id", using: :btree
+  add_index "project_deploy_tokens", ["project_id", "deploy_token_id"], name: "index_project_deploy_tokens_on_project_id_and_deploy_token_id", unique: true, using: :btree
 
   create_table "project_features", force: :cascade do |t|
     t.integer "project_id"
@@ -1639,6 +1639,7 @@ ActiveRecord::Schema.define(version: 20180405142733) do
     t.string "path", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.boolean "permanent"
   end
 
   add_index "redirect_routes", ["path"], name: "index_redirect_routes_on_path", unique: true, using: :btree
@@ -2094,7 +2095,6 @@ ActiveRecord::Schema.define(version: 20180405142733) do
   add_foreign_key "clusters_applications_runners", "clusters", on_delete: :cascade
   add_foreign_key "container_repositories", "projects"
   add_foreign_key "deploy_keys_projects", "projects", name: "fk_58a901ca7e", on_delete: :cascade
-  add_foreign_key "deploy_tokens", "projects"
   add_foreign_key "deployments", "projects", name: "fk_b9a3851b82", on_delete: :cascade
   add_foreign_key "environments", "projects", name: "fk_d1c8c1da6a", on_delete: :cascade
   add_foreign_key "events", "projects", on_delete: :cascade
@@ -2160,6 +2160,8 @@ ActiveRecord::Schema.define(version: 20180405142733) do
   add_foreign_key "project_authorizations", "users", on_delete: :cascade
   add_foreign_key "project_auto_devops", "projects", on_delete: :cascade
   add_foreign_key "project_custom_attributes", "projects", on_delete: :cascade
+  add_foreign_key "project_deploy_tokens", "deploy_tokens", on_delete: :cascade
+  add_foreign_key "project_deploy_tokens", "projects", on_delete: :cascade
   add_foreign_key "project_features", "projects", name: "fk_18513d9b92", on_delete: :cascade
   add_foreign_key "project_group_links", "projects", name: "fk_daa8cee94c", on_delete: :cascade
   add_foreign_key "project_import_data", "projects", name: "fk_ffb9ee3a10", on_delete: :cascade