How to resolve SQLSTATE[HY000]: General error: 1824 Failed to open the referenced table in laravel?

Question

我创建了三个迁移tables user_container table用于存储用户详细信息，admin_table用于存储管理员详细信息，blog_table用于存储博客 .admin 可以创建博客，这就是为什么我为管理员与博客 [=29=] 建立外键关系。当我尝试迁移 tables 时，出现以下错误

  Illuminate\Database\QueryException 

  SQLSTATE[HY000]: General error: 1824 Failed to open the referenced table 'admin_table' (SQL: alter table `blogs_table` add constraint `blogs_table_admin_id_foreign` foreign key (`admin_id`) references `admin_table` (`id`))

请帮我解决这个问题我不知道我错在哪里..

迁移table结构

2021_08_11_170129_create_Blogs_table.php

<?php

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

class CreateBlogsTable extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::create('blogs_table', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->string('price');
            $table->string('country');
            $table->longText('description');
            $table->integer('rating');
            $table->longText('image');
            $table->unsignedInteger('admin_id');
            $table->foreign('admin_id')->references('id')->on('admin_table');
            $table->timestamps();
            //$table->softDeletes();
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('blogs_table');
    }
}

2021_08_12_121933_create_admin_table.php

<?php

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

class CreateAdminTable extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::create('admin_table', function (Blueprint $table) {
            $table->id();
            $table->string('firstName');
            $table->string('lastName');
            $table->string('email')->unique();
            $table->string('mobile');
            $table->string('password');
            $table->timestamps();
            //$table->softDeletes();
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('admin_table');
    }
}

Answer 1

您正在尝试运行首先在您的博客 Table 上迁移，然后，您运行在管理员 Table 上迁移。

Laravel migration 使用文件开头的时间戳来决定应该首先迁移哪个 migration。

确保在博客 table 之前先创建一个管理员 table（这也适用于任何有引用的 table）。或者只是重命名文件（更改时间戳），例如：

2021_08_12_121933_create_admin_table.php
2021_08_11_170129_create_Blogs_table.php

为此：

2021_08_11_121933_create_admin_table.php
2021_08_12_170129_create_Blogs_table.php

然后运行 php artisan migrate:fresh 刷新迁移。

Answer 2

当您设置外键时 $table->foreign('admin_id')->references('id')->on('admin_table'); table admin_table 还不存在。

将 admin_table 的迁移名称更改为运行之前的博客名称。

2021_08_11_121933_create_admin_table.php

而不是

2021_08_12_121933_create_admin_table.php

How to resolve SQLSTATE[HY000]: General error: 1824 Failed to open the referenced table in laravel?

How to resolve SQLSTATE[HY000]: General error: 1824 Failed to open the referenced table in laravel?

mysql

migration

laravel

laravel-8