【问题标题】:Cannot delete morphpivot Custom model laravel无法删除 morphpivot 自定义模型 laravel
【发布时间】:2020-07-25 05:16:46
【问题描述】:

我正在将 laravel 用于一个项目,但在删除自定义 morphPivot 关系时遇到了一些问题。

当我尝试删除关系时,我收到以下错误:

Illuminate/Database/QueryException with message 'SQLSTATE[42S22]: Column not found: 1054 Unknown column '' in 'where clause' (SQL: delete from `comment` where (`` = 01418755-c68e-4ea5-8043-cef348c47445))'

据我所知,laravel 正在尝试按 id 删除,但 id 列没有名称,因此无法找到它。但是,我想我清楚地定义了 id 列。这是我的类实现:

<?php

namespace App;

use App\Traits\CanBeBlocked;
use App\Traits\CanBeGhosted;
use App\Traits\CanBeVoted;
use App\Traits\HasUuid;
use GraphQL\Type\Definition\ResolveInfo;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Relations\MorphPivot;
use Illuminate\Support\Facades\DB;
use Nuwave\Lighthouse\Support\Contracts\GraphQLContext;

class Comment extends MorphPivot
{
    use HasUuid,
        CanBeBlocked,
        CanBeGhosted,
        CanBeVoted;

    protected $casts = [
        'id' => 'string'
    ];

    protected $fillable = [
        'id',
        'parent_id',
        'user_id',
        'commentable_id',
        'commentable_type',
        'content',
        'created_at',
        'updated_at'
    ];

    public $incrementing = false;
    public $keyType = 'string';
    protected $primaryKey = 'id';
    /**
     * @brief Users commenting another model
     */
    public function commenter()
    {
        return $this->belongsTo('App\User', 'user_id');
    }

    /**
     * @brief models commented by a User
     */
    public function commentable()
    {
        return $this->morphTo();
    }

    /**
     * @brief replies of the comment
     */
    public function replies()
    {
        return $this->hasMany('App\Comment', 'parent_id');
    }

    public function parent()
    {
        return $this->belongsTo('App\Comment');
    }

    public function repliers()
    {
        return $this->replies->map(function ($reply, $key) {
            return $reply->commenter;
        });
    }

    public function isReply()
    {
        return $this->parent_id !== null;
    }

    public function commentOnly($root, array $args, GraphQLContext $context, ResolveInfo $resolveInfo): Builder
    {
        return Comment::where('parent_id', null);
    }
}

和迁移:

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateCommentTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('comment', function (Blueprint $table) {
            $table->uuid('id');
            $table->primary('id');
            $table->text('content');
            $table->boolean('spoiler')->default(false);
            $table->boolean('hidden')->default(false);
            $table->boolean('edited')->default(false);
            $table->uuid('parent_id')->nullable();
            $table->uuid('user_id');
            $table->uuid('commentable_id');
            $table->string('commentable_type');
            $table->json('meta')->nullable();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('comment');
    }
}

提前感谢您的帮助。

Laravel v6.18.26

【问题讨论】:

  • 你能分享你要删除的代码吗?
  • 我使用 tinker 来尝试删除,例如 App\Comment::first() - >delete()。它适用于其他型号。
  • 试试这个dd(Comment::first()) ;并将输出粘贴到这里。
  • 这里在 tinker App\Comment {#3667 id: "01418755-c68e-4ea5-8043-cef348c47445", content: "Super frangins", 剧透:0,隐藏:0,编辑: 0, parent_id: null, user_id: "5311700e-6271-442d-84b6-f810d902001f", commentable_id: "d299b3d2-7996-46eb-a3e9-bd2883647aff", commentable_type: "App\Amadiora", meta: null, created_at: "2019 -03-21 06:43:22", updated_at: "2019-03-21 06:43:22", } ps:抱歉,我不知道如何在 cmets 中格式化代码
  • 我将模型更改为扩展 Pivot 而不是 MorphPivot 并且可以毫无问题地删除它我认为 MorphPivot 删除方法可能是这里的问题

标签: php laravel eloquent polymorphic-associations


【解决方案1】:

现已在 Laravel 最新版本中修复

【讨论】:

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