Question

文章迁移

Schema::create('articles', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('people_id');
            $table->string('title');
            $table->timestamps();
            $table->foreign('author_id')->references('id')->on('people');
        });

人员迁移

Schema::create('people', function (Blueprint $table) {
            $table->increments('id');
            $table->string('first_name');
            $table->string('last_name');
            $table->string('twitter');
            $table->timestamps();
        });

错误

 SQLSTATE[HY000]: General error: 1005 Can't create table `article`.`#sql-1204_c` (errno: 150 "Foreign key constraint is incorrectly formed") (SQL: alter tab
  le `articles` add constraint `articles_author_id_foreign` foreign key (`author_id`) references `people` (`id`))

我不知道我做错了什么，两个实体对我来说都是一致的，我不知道为什么我收到错误150

Answer 1

首先通过 -

制作people_id unsigned

$table->integer('people_id')->unsigned();

更改此行 -

$table->foreign('author_id')->references('id')->on('people');

对此 -

$table->foreign('people_id')->references('id')->on('people');

检查migrations的订单。首先运行people表迁移，然后运行articles表迁移。

Answer 2

这是因为你还没有定义author_id字段

Schema::create('articles', function (Blueprint $table) {
        $table->increments('id');
        $table->unsignedInteger('author_id');
        $table->string('title');
        $table->timestamps();
        $table->foreign('author_id')->references('id')->on('people');
    });

错误：150＆＃34;外键约束错误形成Laravel

2 个答案: