无法在Codeigniter中显示is_unique的自定义错误消息

Question

我正在使用这些form_validation规则来显示重复条目的错误消息，但是会显示默认错误消息。

$this->form_validation->set_rules('email', 
                                  'Email',                                      
                                  'required|is_unique[users.email]',
                                  'A User is already registered with this E-mail');

Answer 1

请检查以下内容：

$this->form_validation->set_rules(
        'email', 'Email',
        'required|is_unique[users.email]',
        array(
                'is_unique'     => 'A User is already registered with this E-mail : %s'
        )
);