未找到基表或视图：1146 表 Laravel 5.7

Question

当我尝试使用 Laravel 5 将数据保存到 mysql 时出现此错误，其他表单和 save() 方法工作正常，但这个：

SQLSTATE[42S02]：未找到基表或视图：1146 表“datatest.about_category”不存在（SQL：插入about_category（about_id，category_id）值（11、4））

这是我的控制器存储方法：

public function store(AboutRequest $request)
{
    $about = new About();
    $about->title = $request->title;
    $about->body = $request->body;
    $about->save();
    $about->categories()->attach(request('category'));
    return redirect(route('abouts.create'));
}

这是我的模型：

关于.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class About extends Model
{
    public  $table = "abouts";
    public function categories()
    {
        return $this->belongsToMany(Category::class);
    }
}

类别.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    protected $table = "categories";

    public  $fillable = ['id' , 'name'];

    public function abouts(){
        return $this->belongsToMany(About::class);
    }
}

关于表

public function up()
{
    Schema::create('abouts', function (Blueprint $table) {
        $table->increments('id');
        $table->string('title');
        $table->text('body');
        $table->timestamps();
    });
}

对于类别表

public function up()
{
    Schema::create('categories', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->timestamps();
    });
}

Answer 1

您的多对多关系需要三个表：abouts、categories 和 about_category。您尚未创建 about_category 表：

Schema::create('about_category', function (Blueprint $table) {
    $table->integer('about_id')->unsigned();
    $table->integer('category_id')->unsigned();

    $table->foreign('about_id')->references('id')->on('abouts');
    $table->foreign('category_id')->references('id')->on('categories');
});