Question

这是我的错误：

General error: 1215 Cannot add foreign key constraint (SQL: alter table `author_book` add constraint `author_book_author_id_foreign` foreign key (`author_id`) references `author` (`id`))

我有桌书，并且作者带有数据透视表：

        Schema::create('books', function (Blueprint $table) {
        $table->increments('id');
        $table->unsignedInteger('user_id');
        $table->string('name');
        $table->unsignedInteger('pages');
        $table->string('ISBN');
        $table->integer('price');
        $table->date('published_at');

        $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade')->onUpdate('cascade');

作者表：

    public function up()
{
    Schema::create('authors', function (Blueprint $table) {
        $table->increments('id');
        $table->string('author');
        $table->date('birthdate');
        $table->timestamps();
    });
}

和我的数据透视表：

            $table->increments('id');

        $table->unsignedInteger('author_id');
        $table->unsignedInteger('book_id');

        $table->foreign('author_id')->references('id')->on('author');
        $table->foreign('book_id')->references('id')->on('books');
        $table->timestamps();

请帮助我发现错误！

Answer 1

您拼写了作者 s 表。忘记了s。

$table->foreign('author_id')->references('id')->on('authors');
//                                                        ^

一般错误：laravel迁移php中出现1215

1 个答案: