SQLSTATE [42S22]：找不到列：1054'where子句'中的未知列'schools.submit_application_id'

Question

我收到此错误。

  

SQLSTATE [42S22]：找不到列：1054未知列   'where子句'中的'schools.submit_application_id'（SQL：select * from   schools schools。submit_application_id = 1和schools   submit_application_id。public function index() { $inspectors_lists = SubmitApplication::latest()->where('approved', 1)->get(); return view('Admin.inspectors-list.all', compact('inspectors_lists')); } 不为空）（查看：   C：\ XAMPP \ htdocs中\项目\ tvto \资源\视图\管理员\检查员列表\ all.blade.php）

InspectionListController.php

<td>{{ $inspectors_list->school_list->user->first_name }}</td>

all.blade.php

public function school_lists()
{
    return $this->hasMany(SchoolsList::class);
}

SubmitApplication.php

public function user()
{
    return $this->belongsTo(User::class);
}

public function submit_application()
{
    return $this->belongsTo(SubmitApplication::class);
}

SchoolsList.php

public function school_lists()
{
    return $this->hasMany(SchoolsList::class);
}

SubmitApplication.php

public function schools()
{
    return $this->hasMany(SchoolsList::class);
}

user.php的

public function up()
{
    Schema::create('submit_applications', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('requisition_id')->nullable()->unsigned();
        $table->integer('school_id')->nullable()->unsigned();
        $table->integer('approved')->nullable(true);
        $table->string('application')->nullable(true);
        $table->timestamps();
        $table->foreign('requisition_id')->references('id')->on('requisitions');
        $table->foreign('school_id')->references('id')->on('schools');
    });
}

对于SubmitApplication表：

public function up()
{
    Schema::create('schools', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->unsigned();
        $table->string('province_name');
        $table->string('center_name');
        $table->string('national_number_founder');
        $table->string('school_name');
        $table->timestamps();

        $table->foreign('user_id')->references('id')->on('users');
    });
}

对于SchoolList表：

MultipleConfigFiles