Php Laravel Collection-与Where具有等价关系的条件

我有三张桌子：

用户：

Schema::create('users', function (Blueprint $table) {
    $table->unsignedInteger('id')->unique();
    $table->string('name', 50)->nullable();
    $table->timestamps();
});

对话：

Schema::create('conversations', function (Blueprint $table) {
    $table->bigIncrements('id');
    $table->string('token', 50)->nullable();
    $table->timestamps();
});

和用户对话：

Schema::create('conversation_user', function (Blueprint $table) {
    $table->unsignedInteger('conversation_id');
    $table->unsignedInteger('user_id');
    $table->dateTime('read_at')->nullable();
});

一个对话可以有两个用户

我为用户提供了这个类：

class User extends Model {
    public function conversations(){
        return $this->belongsToMany(Conversation::class, 'conversation_user', 'user_id', 'conversation_id');
    }

    public function getConversationWith($user_id){
        return $this->conversations()->whereHas('users', function ($q) use ($user_id) {
            $q->where('ml_users.user_id', $user_id);
        })->first();
    }
}

我的问题：我需要将getConversationWith（）方法更改为：

public function getConversationWith($user_id){
    return $this->conversations->where('users.user_id', $user_id)->first();
    // Or this
    return $this->conversations->whereIn('users.user_id', [$this->id, $user_id])->first();
}

获取与给定用户\u id的对话

有没有办法在收藏中做到这一点？

---

提前感谢

您可以像下面那样完成这项工作，但如果您有一个大数据集，它将无法很好地执行

class User extends Model
{
    public function conversations()
    {
        return $this->belongsToMany(Conversation::class, 'conversation_user', 'user_id', 'conversation_id');
    }

    public function getConversationWith($user_id)
    {
        // conversation IDs from target user
        $conversationIds = Conversation::whereHas('user', function($query) use ($user_id)
        {
            $query->where('users.id', $user_id);
        })->pluck('id')->toArray();

        // all conversations from the current user where target user has participated
        return $this->conversations()->whereIn('conversations.id', $conversationIds)->get();
    }
}

希望有帮助