Phalcon：2个函数的顺序“初始化”和“onConstruct”在控制器和模型 [英] Phalcon: the order of 2 functions "initialize" and "onConstruct" in Controller and Model

问题描述

我检查自己，看到控制器上的执行顺序是onConstruct然后初始化，而在模型是初始化然后onConstruct。

I check myself and see that, the order of execution on Controller is "onConstruct" then "initialize", while on Model is "initialize" then "onConstruct".

那么为什么这些方法的执行顺序在Controller和Model上是不同的呢？任何想法？

So why the order of execution of these methods is different on Controller and Model? Any idea?

推荐答案

除了相同的名字， initialize 在模型和控制器中：

Besides the same name, initialize has different purposes in Models and Controllers:

对于模型初始化将主要负责初始化模型的元数据（列映射，模型关系等）因为所有模型元数据都静态存储在模型类中（btw，这就是为什么 initialize 每个模型每个请求只调用一次）。

For Models initialize will mostly take care of initializing the model's metada(column mapping, model relationships, etc) that's why it's called before the constructor since all model metadata is stored statically in the model class (btw that's why initialize is called just once per request per model).

如果路由匹配成功，则控制器 initialize 必要操作已存在并已正确请求）和，当前用户具有根据 ACL （如果有）。所以控制器首先构造为检查那些事情（ onConstruct 被触发），然后如果一切顺利，您可以初始化您的控制器为真实的（ initialize 被触发）。

For Controllers initialize is just called if the route is matched successfully(the required action exists and was requested properly) and the current user has privileges to execute that action according to the ACL(if any). So the controller is constructed first to check those things (onConstruct is fired), and then if everything goes well you can initialize your controller for real (initialize is fired).

现在谈论 onConstruct ，在模型和控制器，这只是一个替换本机构造函数。在您的类中实现 __ construct 方法 不推荐 ，因为它们将由框架调用，并期望为其指定特定的方法签名。此外，你需要记住总是钩住父构造函数。因此，通过使用 onConstruct 事件，我们可以避免所有这些问题。

Now talking about onConstruct, both in Models and Controllers, that's just a replacement for native constructors. The implementation of a __construct method in your classes isn't recommended because they will be called by the framework that expects a specific method signature for it. Also you'll need to remember to always hook the parent constructor manually. So, by using the onConstruct event instead we're avoiding all these issues.

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