是否应在yii应用程序中以所有形式使用表单模型？

What wrong is it in creating a simple form tag in html to hold a small form whose validation can be written easily instead of creating a form model to hold the rules and labels?

Consider this before abandoning the form model. The form model does a lot of things for you. Some of these things will take a lot of effort to build for yourself. Here is a quick list:

• It maintains code consistency within your app
• It maintains UI consistency for the user
• It provides validation
• It provides Error Handling
• It helps prevent certain attacks like SQL Injection
• It can help prevent other attacks if you turn on CSRF tagging
• Client side validation is built in and can be enabled with a configuration
• Ajax functionality is built in and can be enabled with a configuration

There are a lot of things you are giving up. Even for a simple form. And those things go beyond validation and HTML formatting.

You can choose a simplest way, it will not be wrong.

FormModels should help you to organize a lot of validation rules, scenarios and other. If creation of FormModel will take more effort than just write validation in controller, this isn't case for FormModel.