嘿,我目前正在Laravel 6数据库迁移中工作,但是当我执行php artisan migration:fresh时,以下错误提示我:
SQLSTATE [HY000]:常规错误:1215无法添加外键约束(SQL:更改表category_post
添加约束category_post_category_id_foreign
外键(category_id
)引用id
( categories
)在更新级联上删除级联上)
我检查了以下内容:
这是我的迁移代码,希望您能看到我犯的错误,因为我找不到它。
// Table for storing Blog Posts
Schema::create('posts', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('title');
$table->string('slug');
$table->string('read_time');
$table->string('summary');
$table->string('body');
/*$table->timestamps('created_at');
$table->timestamps('updated_at');*/
$table->timestamps();
});
// Table for storing categories
Schema::create('categories', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('name')->unique();
$table->string('slug')->unique();
$table->string('description');
$table->timestamps();
});
// Table for association of Categories with Blog Posts
Schema::create('category_post', function (Blueprint $table) {
$table->bigInteger('category_id');
$table->bigInteger('post_id');
$table->foreign('category_id')->references('id')->on('categories')
->onUpdate('cascade')->onDelete('cascade');
$table->foreign('post_id')->references('id')->on('posts')
->onUpdate('cascade')->onDelete('cascade');
$table->primary(['post_id', 'category_id']);
});
// Table for association of Users with Blog Posts
Schema::create('user_post', function (Blueprint $table) {
$table->bigInteger('user_id');
$table->bigInteger('post_id');
$table->foreign('user_id')->references('id')->on('users')
->onUpdate('cascade')->onDelete('cascade');
$table->foreign('post_id')->references('id')->on('posts')
->onUpdate('cascade')->onDelete('cascade');
$table->primary(['user_id', 'post_id']);
});
毕竟,目标是将类别和用户与帖子相关联,以便我可以在帖子上包含标签和用户。
在此先感谢您的帮助和友善,我对Laravel还是很陌生,但是我对PHP有很好的了解,因此,如果您能解释我做错了什么,那将是非常不错的:)
答案 0 :(得分:3)