扩展Laravel 5.5 / 5.6蓝图

Question

如何使用自定义方法$ table-> myMethod（）扩展Laravel 5.5 / 5.6 MySQL Blueprint，如预建方法$ table-> timestamps（）;？

我试过一个SQLite的例子：qazxsw poi

但我无法让它发挥作用。我正在开发自己的包（使用包开发最佳实践），并希望从那里包含Blueprint扩展。

我的开发包有Laravel扩展文件夹“Extension”：./ packages / vendorname / packagename / src / Extension /

有文件：

1) ./packages/vendor那么/package那么/双人床/extension/blueprint.PHP

Extending Blueprint for SQLite in Laravel 5

2) ./packages/vendor那么/package那么/双人床/extension/MySQL connection.PHP

<?php

namespace Vendorname\Packagename\Extension;

use Illuminate\Database\Schema\Blueprint as ParentBlueprint;
use Illuminate\Support\Facades\DB;

class Blueprint extends ParentBlueprint
{

     public function myMethod()
     {
          $this->text('custom_column')->default('Some value');
          $this->text('custom_column2')->default('Some value2');
     }
}

我的包有服务提供者：./packages/vendorname/packagename/src/VendornamePackagenameServiceProvider.php with register（）方法：

<?php

namespace Vendorname\Packagename\Extension;

use Vendorname\Packagename\Extension\Blueprint;
use Illuminate\Database\MySqlConnection as ParentMySqlConnection;
use Illuminate\Database\Schema\MySqlBuilder;

class MySqlConnection extends ParentMySqlConnection
{

     public function getSchemaBuilder()
     {
          if (is_null($this->schemaGrammar)) {
               $this->useDefaultSchemaGrammar();
          }

          $builder = new MySqlBuilder($this);
          $builder->blueprintResolver(function ($table, $callback) {
               return new Blueprint($table, $callback);
          });

          return $builder;
     }
}

此外，我的包还有迁移文件：./ packages / vanilla / vanilla-admin / modules / modules / 18_07_213437_create_logs_table.php：

public function register()
{      if ($this->app->config->get('vendorname-packagename') === null) {
          $this->app->config->set('vendorname-packagename', require __DIR__.'/../config/vendorname-packagename');
     }

     $this->app->bind('db.connection.mysql', Vendorname\Packagename\Extension\MySqlConnection::class);
}

如何使用标准“使用Illuminate \ Database \ Schema \ Blueprint;”在迁移中，因为我不想使用“使用供应商名称\包名称\扩展名\蓝图;”。

我在运行迁移“php artisan migrate：refresh”时遇到错误：

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
//use Vendorname\Packagename\Extension\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateLogsTable extends Migration
{

    public function up()
    {
        Schema::create('logs', function (Blueprint $table) {
            $table->increments('id');
            $table->text('package');
            $table->longText('log');
            $table->myMethod();
            $table->timestamps();
        });
    }

    public function down()
    {
        Schema::dropIfExists('logs');
    }
}

请帮我找一个解决方案。我在互联网上搜索并测试了一整天，我无法让它工作:(

Answer 1

使用Laravel 5.5，扩展Blueprint的最佳方法是在

Type error: Argument 1 passed to CreateLogsTable::{closure}() must be a
  n instance of Vanilla\VanillaAdmin\Extension\Blueprint, instance of Ill
  uminate\Database\Schema\Blueprint given, called in /Users/raido/.compos
  er/vendor/bin/laravel-packages/vendor/laravel/framework/src/Illuminate/
  Database/Schema/Builder.php on line 164

启动方法中注册macros，如下所示：

AppServiceProvider

Answer 2

我在寻找同样的问题时发现了这一点。我正在使用Laravel 5.8并且这样做。

1. 创建自定义Blueprint类

Blueprint::macro('yourmethod', function () {  
    // your method here
});

2. 创建MySqlConnection类或您需要的任何内容

namespace App\Database\Schema;

class Blueprint extends \Illuminate\Database\Schema\Blueprint
{
    public function datetimeCreatedAt($precision = 0)
    {
        return $this->dateTime('created_at', $precision);
    }

}

3. 更改AppServiceProvider

namespace App\Database;

class MySqlConnection extends \Illuminate\Database\MySqlConnection
{
    public function getSchemaBuilder()
    {
        $builder = parent::getSchemaBuilder();
        $builder->blueprintResolver(function ($table, $callback) {
            return new \App\Database\Schema\Blueprint($table, $callback);
        });

        return $builder;
    }
}

Answer 3

只需在迁移中使用它：

namespace App\Providers;

use App\Database\MySqlConnection;
use Illuminate\Database\Connection;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    public function register()
    {
        Connection::resolverFor('mysql', function ($connection, $database, $prefix, $config) {
            return new MySqlConnection($connection, $database, $prefix, $config);
        });
    }
}