由于验证，更新失败

Question

如果我尝试从我的 Student 模型更新一个属性，它会因为验证而失败。

  def update
    @student = Student.find(params[:id])
    if params['student']
      if params['student']['freedays']
        weekday_nbs = params['student']['freedays']&.first&.split(',')
        params['student']['freedays'] = weekday_nbs.inject([]){|sum, last| sum << Student::FREE_DAYS[last.to_i]}
      end
      if params['student']['vehicles']
        params['student']['vehicles'] = params['student']['vehicles']&.split(',')
      end
      if params['student']['driving_licenses']
        params['student']['driving_licenses'] = params['student']['driving_licenses']&.split(',')
      end
    end
    @student.update(student_params)
    redirect_to student_path(@student)
  end

这是我尝试更新属性 (:beschikbaar) 时遇到的错误：

`ActiveRecord::RecordInvalid: Validation failed: First name can't be blank, Last name can't be blank, Age can't be blank, Photo can't be blank, Studie can't be blank, Description can't be blank, Phone number can't be blank from /home/yves/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/ac‌​tiverecord-5.0.1/lib‌​/active_record/valid‌​ations.rb:78:in`

有人知道如何解决这个问题吗？

谢谢！

Answer 1

update 方法将调用验证，如果对象未通过验证，将不保存。当您尝试更新特定属性时，我建议您改用update_attribute 或update_column。

只是改变

@student.update(student_params)

到

@student.update_attribute(beschikbaar: params[:beschikbaar])

或

@student.update_column(beschikbaar: params[:beschikbaar])