Question

主表POll

 public function up()
    {
        Schema::create('poll', function (Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
            $table->string('poll_question', 255);
            $table->boolean('status',1)->default(0)->index();
            $table->unsignedInteger('order');
        });
    }

明细表

  public function up()
    {
        Schema::create('poll_option', function (Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
            $table->integer('poll_id');
            $table->string('poll_option', 255);
            $table->unsignedInteger('vote_poll_option');
            $table->unsignedInteger('order');
            $table->boolean('status',1)->default(0)->index();

            $table->foreign('poll_id')->references('id')->on('poll')->onUpdate('cascade')->onDelete('cascade');
        });
    }

当我用外键运行php artisan时

SQLSTATE [HY000]：常规错误：1005无法创建表mydb。#sql-6f4_433（错误号：150“外键约束形成错误”）

注意：我使用 laravel 5.2 和mysql类型已经Innodb错误形成的主要原因是什么

Answer 1

详细信息表中的

public function up()
    {
        Schema::create('poll_option', function (Blueprint $table) {
            $table->increments('id');
            $table->timestamps();
            $table->integer('poll_id')->unsigned(); //Change Here
            $table->string('poll_option', 255);
            $table->unsignedInteger('vote_poll_option');
            $table->unsignedInteger('order');
            $table->boolean('status',1)->default(0)->index();

            $table->foreign('poll_id')
              ->references('id')->on('poll')
              ->onDelete('CASCADE')
              ->onUpdate('CASCADE');
        });
    }

这对你有用

php artisan迁移外键错误

1 个答案: