在rails中使用simpleform进行多选工作

Question

我的目标是让老师能够选择他们能够教授的多个课程，我使用的是简单表格。可以是复选框或标签

以下是我的设置。

教师档案模型

class TeacherProfile < ApplicationRecord
  belongs_to :subject 
  belongs_to :grade
  # belongs_to :curriculum
  has_many :curriculums
  belongs_to :user

  validates :national_identity, :curriculum_ids, :grade_id, :subject_id,
    :employer, :years_teaching, 
    :about_me, presence: true

  def self.teachers_classes(user_id)
    ClassRoom.where(user_id: user_id)
  end
end

课程模式

class Curriculum < ApplicationRecord
  has_many :student_profiles
  has_many :teacher_profiles
end

表格

.py-5.bg-light-v2
  .container
    .row.align-items-center
        .col-md-6
            %h2 Teacher Profile

%section.padding-y-50.border-bottom.border-light
  .container
    .row
      .col.col-md-8.mb-5
        = simple_form_for(@teacher_profile) do |f|
          = f.error_notification
          = f.error_notification message: f.object.errors[:base].to_sentence if f.object.errors[:base].present?

          .border-bottom.mb-4.pb-4
            %h5.mb-4 
              Personal Details
              %br
              %small.text-muted select what applies to you, tick if it applies to you.

            = f.input :national_identity, label: "Enter your National ID or Passort", placeholder:"216331771"
            = f.input :special_education, label: "I have Special education skills"
            = f.input :has_hardware, label: "I have a computer & Internet"
            = f.input :is_available, label: "I am available to tutor"
            = f.input :has_tsc_certificate, label: "I have a TSC certificate"
            = f.input :has_good_conduct, label: "I have  good conduct certificate"

          .border-bottom.mb-4.pb-4
            %h5.mb-4 Professional Details
            = f.input :years_teaching, label: "I have been teaching since"
            .row
              -# .col= f.association :curriculum, prompt: "Select the curriculum you use"
              .col= f.association :curriculums, input_html: {:multiple => true} 
              .col= f.association :grade, prompt: "Select the grades you teach"
            = f.association :subject, prompt: "Select the subjects you teach"
            = f.input :employer, label: "I currently work at", placeholder:"Enter name of employer if applicable or leave blank"

          .border-bottom.mb-4.pb-4
            %h5.mb-4 About your passion
            = f.input :about_me, as: :text, label: "Tell us why you love teaching", placeholder:"I am passionate about teaching..."

          .form-actions
            = f.button :submit, class: "btn btn-primary btn-lg mt-2"

我收到一个错误：

Curriculum ids can't be blank

我可能会错过什么？

Answer 1

在模型中，您应该验证curriculums，而不是curriculum_ids。

Answer 2

建立一个多对多关系的连接表。这将问题分开，允许添加额外的字段而无需太多工作。

创建迁移表/模型 X，并引用所需的字段，在这种情况下使用 subjects、curriculum、grades 和 teacher_profiles。

在此表中创建多对多关系，然后将新模型嵌套在teacher_profiles 下。

视频“Rails - Nested Forms in Rails | [Tutorial]”很有用。