Laravel 迁移错误

Question

我似乎无法弄清楚为什么我会在这个迁移文件上收到这个错误？

错误

[37;41m [Symfony\Component\Debug\Exception\FatalThrowableError] ←[39;49m ←[37;41m Call to a member function nullable() on null ←[39;49m

文件上的日期是在客户 table.This 中创建外国 ID 之后 laravel 5.3。我该如何解决这个错误？

public function up()
{
    Schema::create('invoices', function (Blueprint $table) {
        $table->increments('id');
        $table->timestamps();           
        $table->integer('customer_id')->unsigned();
        $table->timestamps('date_from')->nullable();
        $table->timestamps('date_to')->nullable();
        $table->date('invoice_date')->nullable();
        $table->date('due_at')->nullable();     
        $table->integer('total_charge')->nullable();
        $table->integer('rate')->nullable();
        $table->integer('total_hours')->nullable();
        $table->string('status')->nullable();
        $table->string('description', 255)->nullable();
        $table->string('notes', 255)->nullable();
        $table->string('invoice_ref')->nullable();  

        $table->foreign('customer_id')
              ->references('id')->on('customers')
              ->onDelete('cascade');                      
    });
}

Answer 1

在这两行中使用timestamp方法...

$table->timestamp('date_from')->nullable();
$table->timestamp('date_to')->nullable();

timestamps() 不接受任何参数并创建两个列：created_at 和 updated_at 参见 Here

Answer 2

从您的代码中删除这两行

$table->timestamp('date_from')->nullable();
$table->timestamp('date_to')->nullable();

并且只包括这一行用于 timpstamping:

 $table->timestamps();

Answer 3

你这样替换它 - 从时间戳中删除 s:

$table->timestamp('date_from');
$table->timestamps('date_day');

Laravel 迁移错误

Laravel Migration Error

laravel-5.3