Question

我有2个表（区域和类别），我想在Regions表中有一个外键这是我的迁移文件：

public function up()
{
    Schema::create('regions', function (Blueprint $table) {
        $table->engine = 'InnoDB';
        $table->increments('id');
        $table->string('nom');
        $table->text('description');
        $table->integer('vote');
        $table->string('securite');
        $table->integer('idCat')->unsigned()->change();
        $table->foreign('idCat')->references('idCat')->on('categories');
        $table->timestamps();
         });


}

表'类别'看起来像这样：

 public function up()
{
    Schema::create('categories', function (Blueprint $table) {
        //$table->engine = 'InnoDB';
        $table->increments('idCat');
        $table->String('description');
        $table->timestamps();
    });
}

但是我收到了这个错误：语法错误或访问冲突：1072键列'idCat'
表中不存在（SQL：alter table regions添加约束regions_ idcat_foreign外键（idCat）引用categories（idCat））

残友帮帮我吧？

Answer 1

确保你摆脱了更改（），列还没有。以下代码对我来说非常合适......

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class Test extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('categories', function (Blueprint $table) {
            //$table->engine = 'InnoDB';
            $table->increments('idCat');
            $table->String('description');
            $table->timestamps();
        });

        Schema::create('regions', function (Blueprint $table) {
            $table->engine = 'InnoDB';
            $table->increments('id');
            $table->string('nom');
            $table->text('description');
            $table->integer('vote');
            $table->string('securite');
            $table->integer('idCat')->unsigned();
            $table->foreign('idCat')->references('idCat')->on('categories');
            $table->timestamps();
        });


    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('regions');
        Schema::drop('categories');
    }
}

无法添加外键Laravel

1 个答案: