Handles default expires_at date directly into DeployToken model

app/helpers/deploy_tokens_helper.rb

@@ -11,10 +11,10 @@ module DeployTokensHelper
   end
 
   def expires_at_value(expires_at)
-    expires_at unless expires_at >= DeployToken::FUTURE_DATE
+    expires_at unless expires_at >= DeployToken::FOREVER
   end
 
   def show_expire_at?(token)
-    token.expires? && token.expires_at != DeployToken::FUTURE_DATE
+    token.expires? && token.expires_at != DeployToken::FOREVER
   end
 end

app/models/deploy_token.rb

@@ -4,7 +4,9 @@ class DeployToken < ActiveRecord::Base
   add_authentication_token_field :token
 
   AVAILABLE_SCOPES = %i(read_repository read_registry).freeze
-  FUTURE_DATE = Date.new(3000 - 01 - 01)
+  FOREVER = DateTime.new(3000, 1, 1)
+
+  default_value_for :expires_at, FOREVER
 
   has_many :project_deploy_tokens, inverse_of: :deploy_token
   has_many :projects, through: :project_deploy_tokens

app/services/deploy_tokens/create_service.rb

@@ -16,7 +16,7 @@ module DeployTokens
     end
 
     def default_expires_at
-      DeployToken::FUTURE_DATE
+      DeployToken::FOREVER
     end
   end
 end

db/migrate/20180319190020_create_deploy_tokens.rb

@@ -7,7 +7,7 @@ class CreateDeployTokens < ActiveRecord::Migration
       t.boolean :read_repository, null: false, default: false
       t.boolean :read_registry, null: false, default: false
 
-      t.datetime_with_timezone :expires_at, null: false, default: '3000-01-01'
+      t.datetime_with_timezone :expires_at, null: false
       t.datetime_with_timezone :created_at, null: false
 
       t.string :name, null: false

db/schema.rb

@@ -687,7 +687,7 @@ ActiveRecord::Schema.define(version: 20180405142733) do
     t.boolean "revoked", default: false
     t.boolean "read_repository", default: false, null: false
     t.boolean "read_registry", default: false, null: false
-    t.datetime_with_timezone "expires_at", default: '3000-01-01 00:00:00', null: false
+    t.datetime_with_timezone "expires_at", null: false
     t.datetime_with_timezone "created_at", null: false
     t.string "name", null: false
     t.string "token", null: false

spec/services/deploy_tokens/create_service_spec.rb

 require 'spec_helper'
 
-describe DeployTokens::CreateService, :clean_gitlab_redis_shared_state do
+describe DeployTokens::CreateService do
   let(:project) { create(:project) }
   let(:user) { create(:user) }
   let(:deploy_token_params) { attributes_for(:deploy_token) }
@@ -22,6 +22,14 @@ describe DeployTokens::CreateService, :clean_gitlab_redis_shared_state do
       end
     end
 
+    context 'when expires at date is not passed' do
+      let(:deploy_token_params) { attributes_for(:deploy_token, expires_at: '') }
+
+      it 'should set FOREVER date' do
+        expect(subject.expires_at).to eq(DeployToken::FOREVER)
+      end
+    end
+
     context 'when the deploy token is invalid' do
       let(:deploy_token_params) { attributes_for(:deploy_token, read_repository: false, read_registry: false) }