ruby-on-rails-4 – Rails测试ActiveRecord错误

我在rails应用程序中启动了测试环境,当我使用默认代码测试用户模型时,它会抛出以下错误：

测试代码：

test "the truth" do
 assert true
end

1) Error:
UserTest#test_the_truth:
ActiveRecord::RecordNotUnique: Mysql2::Error: Duplicate entry '' for key 'index_users_on_email': INSERT INTO `users` (`created_at`, `updated_at`, `id`) VALUES ('2014-02-01 17:45:51', '2014-02-01 17:45:51', 298486374)

在我的用户模型中,我有以下关联

devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :trackable, :validatable
validates :user_name , :email, :first_name ,:last_name , :presence => true
has_many :invitations
has_many :incoming_friends, -> { where(:status => '1') }, :class_name => "User", :foreign_key => "friend_id", :through => :invitations
has_many :outgoing_friends, -> { where(:status => '1') }, :class_name => "User", :foreign_key => "user_id", :through => :invitations

首先,检查test / fixtures / users.yml中的用户模型夹具.如果您有一个和两个的空声明：

one: {}
# column: value
#
two: {}
#  column: value

它可能会导致问题,因为缺乏属性.删除此部分或评论它：

#one: {}
# column: value
#
#two: {}
#  column: value

然后尝试再次运行它.