Nullable 和 Unique 不适用于 laravel 验证

Question

我想保持可为空并且在我的验证中应该是唯一的。这是我的代码。你能帮我解决这个问题吗在控制器中

$this->validate($request, [
   'class_teacher' => 'unique:sections',
]);

迁移中

public function up()
{
    Schema::create('sections', function (Blueprint $table) {
        ...
        $table->bigInteger('class_teacher')->unsigned()->nullable();
        ...

        $table->foreign('class_teacher')->references('id')->on('teachers');
    });
}

在blade

<select class="select2" name="class_teacher" id="teacher">
    <option value=""></option>
    @foreach($teachers as $teacher)
        <option value="{{ $teacher->id }}" {{ old('class_teacher') == $teacher->id ? 'selected' : '' }}>{{ $teacher->name }}</option>
    @endforeach
</select>

这里class_teacher是老师table的外键。但我想为 class 老师保持可为空和唯一。但现在正在验证。它总是发送错误。 The class teacher has already been taken. 任何人都可以帮助我保持这种验证，使其保持唯一且可以为空吗？请问？

Answer 1

以这种方式更改您的验证规则

$this->validate($request, [
  'class_teacher' => 'sometimes|nullable|unique:sections',
]);

Nullable 和 Unique 不适用于 laravel 验证

Nullable and Unique is not working on laravel validation

validation

laravel

laravel-validation