mus*_*lla 3 php laravel-5 laravel-5.5
我正在做一个laravel项目,每次更改表(添加或删除列)并运行php artisan migrate:refresh。我收到此错误:
[Symfony \ Component \ Debug \ Exception \ FatalErrorException]无法在写上下文中使用方法返回值
解决方案尝试:
composer dump-autoload(失败)先前的迁移文件:
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateCommentsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('comments', function (Blueprint $table) {
$table->increments('id');
$table->integer('post_id');
$table->string('body');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('comments');
}
}
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更改的迁移文件:
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateCommentsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('comments', function (Blueprint $table) {
$table->increments('id');
$table->integer('user_id');
$table->integer('post_id');
$table->string('body');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('comments');
}
}
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我在up函数的更改文件中添加了user_id
试试这个命令对我有用
php artisan migrate:fresh
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但是,要小心!此命令将从数据库中删除所有数据:
注意:migrate:fresh命令将从数据库中删除所有表,然后执行migrate命令。
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