Question

我有一个Enrollment模型如下所示，我正在尝试在表单视图中使用date_select和options_from_collection_for_select。我无法创建，因为我不知道是否使用.build或.new而date_select似乎是在表单中单独发送日/月/年，例如

Parameters: {"utf8"=>"✓", "authenticity_token"=>"HUQmbkmoATm6P/Avl11wmYqMrYeXVTZ/qmYfC2dpAFM=", "enrolment"=>{"course"=>"First Aid", "expiry(1i)"=>"2012", "expiry(2i)"=>"2", "expiry(3i)"=>"20"}, "commit"=>"Create Enrolment", "group_id"=>"2"}

我的报名模式......

class Enrolment < ActiveRecord::Base
  belongs_to :course
  belongs_to :group
  attr_accessible :course_id, :group_id, :expiry
  validates_presence_of :expiry, :course_id, :group_id 
end

在我的_form.html.erb

中

<%= form_for([:admin,@group,@enrolment]) do |f| %>
---
  <div class="field">
    <%= f.label :course %><br />
    <%= f.select :course, options_from_collection_for_select(@courses, 'name', 'name') %>
  </div>
  <div class="field">
    <%= f.label :expiry %><br />
    <%= f.date_select :expiry, :start_year => Time.now.year, :end_year => Time.now.year + 5 %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

在我的注册控制器中

  def new
    @group = Group.find(params[:group_id])
    #@enrolment = @group.enrolments.build
    @enrolment = Enrolment.new
    @courses = Course.all

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @enrolment }
    end
  end

  def create
    @group = Group.find(params[:group_id])
    @course = Course.find_by_name(params[:enrolment][:course])
    @courses = Course.all
    #@enrolment = Enrolment.new(params[:enrolment])
    @enrolment = @group.enrolments.build(:course_id => @course.id)

    respond_to do |format|
      if @enrolment.save
        format.html { redirect_to admin_group_path(@group), notice: 'Enrolment was successfully created.' }
        format.json { render json: @enrolment, status: :created, location: @enrolment }
      else
        format.html { render action: "new" }
        format.json { render json: @enrolment.errors, status: :unprocessable_entity }
      end
    end
  end

当我尝试提交给我验证错误，我的到期时间不能为空时，如何将其添加到create方法中以便它可以正常工作？非常感谢任何帮助

Answer 1

您是否尝试过：

@enrolment = @group.enrolments.build(params[:enrolment])

基本上，您没有使用用户通过表单提交的信息，这就是您的到期时间为零的原因。当然，你必须稍微改变你的表格：

options_from_collection_for_select(@courses, 'id', 'name')

所以你要传递id而不是名字。

date_select和构建问题

1 个答案: