Cake PHP中的控制器继承？

Question

Has anyone attempted this? Is it possible, and if so, what kind of problems will I run into if I try to accomplish it?

Answer 1

If you goal is to share logic between controllers:

• add the logic to the AppController to share it with all the controllers in your app.

• make a component and add that to $this->components for the controllers you want to share it.

Adding additional inheritance between controllers should only be concidered as a last resort, as you have to pay extra attention to how components and helpers are handled. Eg you must manually merge $this->components & $this->helpers with the AppController and the controller you are inheriting from.

Answer 2

I have put an additional layer between the AppController and some special controllers in an app.

The only problem you'll run into is the merging of the $helpers and $components class attributes. In CakePHP, overriding those variables in your controllers will not overwrite those set by the AppController, but it will merge them.

This is done by a special method named __mergeVars() in the Controller base class, and it unfortunately does it only for the default controller structure. Your additional layer will not be merged correctly, if you want $helpers and $controllers inheritance from AppController down to your controllers.

Answer 3

You will run into issue with $components and $helpers properties not merging and instead overwriting. Be sure to define protected $_mergeParent = 'YourParentClass' to have this done properly. The default value for this is 'AppController' .

Source code: http://api.cakephp.org/2.4/source-class-Controller.html#294-301

Answer 4

Why not try? At least, it's already being done with the Controller -> AppController -> MyController classes.

Answer 5

当然，你可以轻松地在Cake中继承控制器......然后你通常会利用他们的钩子函数，比如'beforeFilter'，'afterFilter'等来为你的控制器添加运行时逻辑。我通常至少放置一个抽象控制器在蛋糕控制器和您在路线中配置的最终控制器之间。