完整性约束违规：字段列表中的 1052 列“updated_at”不明确

Posted 2023-02-16

【中文标题】完整性约束违规：字段列表中的 1052 列“updated_at”不明确

【英文标题】：Integrity constraint violation: 1052 Column 'updated_at' in field list is ambiguous

【发布时间】：2020-10-11 19:00:25

【问题描述】：

App\User Model 文件内容：-

<?php

namespace App;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Tymon\JWTAuth\Contracts\JWTSubject;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable implements JWTSubject

    use Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password',
    ];

    public function khatmas()
    
        return $this->hasMany('App\Khatma');
        
    

    public function messages()
    
        return $this->hasManyThrough('App\KhatmaRead','App\Khatma')
        ->select('reader_name','message','updated_at')
        ->where('message','!=',NULL);
    

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
    ];

     public function getJWTIdentifier()
    
        return $this->getKey();
    

    /**
     * Return a key value array, containing any custom claims to be added to the JWT.
     *
     * @return array
     */
    public function getJWTCustomClaims()
    
        return [];
    

khatma_reads 迁移文件：-

    $table->bigIncrements('id');
    $table->unsignedBigInteger('khatma_id');
    $table->foreign('khatma_id')->references('id')->on('khatmas')->onDelete('cascade');
    $table->string('reader_name')->nullable();
    $table->longText('message')->nullable();
    $table->timestamps();

在 user->message() 方法中，当我将列“updated_at”或“created_at”放在 ->select 方法上时出现错误：-

"SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'updated_at' in field list is ambiguous (SQL: select `reader_name`, `message`, `updated_at`, `khatmas`.`user_id` as `laravel_through_key` from `khatma_reads` inner join `khatmas` on `khatmas`.`id` = `khatma_reads`.`khatma_id` where `message` is not null and `khatmas`.`user_id` in (1))"

当我从查询构建器中完全删除 ->select() 方法时，我得到了所有列的响应，包括 created_at 和 updated_at 列。

我该如何解决这个问题？

【参考方案1】：

那是因为您的 KhatmaRead 和 Khatma 模型有 update_at 列，并且在这里：

->select('reader_name','message','updated_at')

您没有指定从哪个表中获取该列，这很模糊。你应该这样做：

->select('reader_name','message','khatma_reads.updated_at')

【讨论】：

我试过返回错误“SQLSTATE[42S22]: Column not found: 1054 Unknown column 'Khatma.updated_at' in 'field list' (SQL: select reader_name, message, @987654328 @.updated_at, khatmas.user_id as laravel_through_key from khatma_reads inner join khatmas on khatmas.id = @9876543@37@.khatma_id khatma_id 不是 null 和khatmas.user_id in (1))"

我还尝试使用“KhatmaRead.updated_at”返回错误“SQLSTATE[42S22]：未找到列：1054 '字段列表'中的未知列'KhatmaRead.updated_at'（SQL：选择reader_name， message, KhatmaRead.updated_at, khatmas.user_id as laravel_through_key from khatma_reads inner join khatmas on khatmas.id id = id@986545 987654355@ 不为空且khatmas.user_id 在 (1))"

这只是一个例子。您的模型名为KhatmaRead，我不知道您的表的名称，您不应该输入模型名称而是表的名称。但似乎是khatma_reads，所以你必须这样做khatma_reads.updated_at

它的工作，谢谢。我输入了 khatma_reads 表名，现在它工作正常“khatma_reads.updated_at”，我已经更新了我的问题并包含了 khatma_reads 迁移文件内容，您能否用“khatma_reads.updated_at”更新您的答案，以便我接受。