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Joseph Morgan
Published in : 2021-04-29

[Solved] SQLSTATE[HY000]: General error: 1824 Failed to open the referenced table (alter on Foreign key)

Laravel

Hello everyone, 

I am facing an issue with my table migration I am getting a weird error while running 

php artisan migrate:fresh

The error is 

  SQLSTATE[HY000]: General error: 1824 Failed to open the referenced table 'blog' (SQL: alter table `blog_comments` add constraint `blog_comments_postid_foreign` foreign key (`postID`) references `blog` (`id`) on delete cascade)

  at C:\laravel\wp4world\vendor\laravel\framework\src\Illuminate\Database\Connection.php:671
    667|         // If an exception occurs when attempting to run a query, we'll format the error
    668|         // message to include the bindings with SQL, which will make this exception a
    669|         // lot more helpful to the developer instead of just the database's errors.
    670|         catch (Exception $e) {
  > 671|             throw new QueryException(
    672|                 $query, $this->prepareBindings($bindings), $e
    673|             );
    674|         }
    675|

Here is the migration file 

<?php

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

class CreateBlogsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up(){
        Schema::create('blog', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('title');
            $table->string('post_url');
            $table->string('img_path')->nullable();
            $table->longtext('content');
            $table->string('tags');
            $table->string('status')->default(0);
            $table->string('public_date', 30);
            $table->unsignedBigInteger('ownerID');
            $table->foreign('ownerID')->references('id')->on('admins')->onDelete('cascade');
            $table->timestamps();
        });
    }

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

Does anyone know what is the issue about? I had checked everything and there is no error or any missing thing?
Thank you in advance

web-brackets.com

Comments

Jo Micheal Date : 2021-04-29

Best answers

5

Best answers

5

Hello Joseph, 
As I see that your code is missing the InnoDB command to set the engine of the database to use ‘InnoDB’, please add this line in the up function 

<?php 
	$table->engine = 'InnoDB';
?>

so it supposes to look like this 

<?php
    public function up(){
        Schema::create('posts', function (Blueprint $table) {
            $table->engine = 'InnoDB';	//Add this line
            $table->bigIncrements('id');
            $table->string('title');
            $table->string('post_url');
            $table->string('img_path')->nullable();
            $table->longtext('content');
            $table->string('caption', 400);
            $table->string('tags');
            $table->integer('views')->default(0);
            $table->integer('likes')->default(0);
            $table->string('video_iframe')->nullable();
            $table->string('status')->default(0);
            $table->string('public_date', 30);
            $table->unsignedBigInteger('ownerID');
            $table->foreign('ownerID')->references('id')->on('admins')->onDelete('cascade');
            $table->timestamps();
        });
    }
?>

Good Luck :)

 

Joseph Morgan Date : 2021-04-29

Thank you Jo, this was a sally error, this is the first time to hear about the ‘InnoDB’

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