扩展蓝图课程?

问题描述

我想覆盖在Blueprint类中找到的timestamps()函数.我该怎么办?

I want to override the timestamps() function found in the Blueprint class. How can I do that?

例如

public function up() {
    Schema::create('users', function (Blueprint $table) {
        $table->increments('id');
        $table->string('username')->unique();
        $table->string('password');
        $table->string('email');
        $table->string('name');
        $table->timestamps(); // <-- I want this to call my method instead of the one found in the base Blueprint class
    });
}

推荐答案

有一个新的blueprintResolver函数，该函数带有一个回调函数，然后该回调函数返回Blueprint实例.

There is a new blueprintResolver function which takes a callback function which then returns the Blueprint instance.

因此，像这样创建您的自定义Blueprint类:

So create your custom Blueprint class like this:

class CustomBlueprint extends Illuminate\Database\Schema\Blueprint{

    public function timestamps() {
        //Your custom timestamp code. Any output is not shown on the console so don't expect anything
    }
}

，然后在返回CustomBlueprint实例的地方调用blueprintResolver函数.

And then call the blueprintResolver function where you return your CustomBlueprint instance.

public function up()
{
    $schema = DB::connection()->getSchemaBuilder();

    $schema->blueprintResolver(function($table, $callback) {
        return new CustomBlueprint($table, $callback);
    });

    $schema->create('users', function($table) {
        //Call your custom functions
    });
}

我不确定使用DB::connection()->getSchemaBuilder();创建新的架构实例是否是最新技术，但是否可行.

I'm not sure if creating a new schema instance with DB::connection()->getSchemaBuilder(); is state of the art but it works.

您还可以覆盖Schema外观，并默认添加自定义蓝图.

You could additionally override the Schema facade and add the custom blueprint by default.

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