部分包含选项后获取选项关闭标签的数组 [英] Getting array of option closing tags after partial containing options

问题描述

我的视图中有动态选择框

I have dynamic select boxes in my view

../ diys / _form.htmlerb

      ...
      <%= f.fields_for :attached_vehicles do |av| %>
        <p>Select make</p>
        <%= av.select :make, options_for_select(@makes.collect { |make|[make.make_name, make.id] }, 0), {}, { id: 'makes_select' } %><br>
        <p>Select model</p>
        <%= av.select :model, (render "make_models/make_model"), {}, { id: 'models_select' } %><br>
      <% end %>
      ...

可在更改时启动咖啡脚本

which launches coffee script on change

../ assets / javascripts / diys.coffee

$ ->
  $(document).on 'change', '#makes_select', (evt) ->
    $.ajax 'update_make_models',
      type: 'GET'
      dataType: 'script'
      data: {
        make_id: $("#makes_select option:selected").val()
      }
      error: (jqXHR, textStatus, errorThrown) ->
        console.log("AJAX Error: #{textStatus}")
      success: (data, textStatus, jqXHR) ->
        console.log("Dynamic make select OK!")

启动

../ views / diys / update_make_models.coffee

$("#models_select").empty()
   .append("<%= escape_javascript(render "make_models/make_model") %>")

可部分渲染

../ views / make_models / make_model.html .erb

<%= @models.collect do |models| %>
  <option val="<%= models.id %>"><%= models.make_model_name %></option>
<% end %>

一切都很好，除了鉴于我在option之后的select元素中得到了一组option close标签元素
像这样 。

and everything works great, except in view I get an array of option closing tags inside select element after option elements like this.

这里还有我的部分

../ controllers / diys_controller.rb

...
def update_make_models
  @models = MakeModel.where("make_id = ?", params[:make_id])
  respond_to do |format|
      format.js
  end
end

def new
  @diy = Diy.new
  @step = @diy.steps.new
  @diy.attached_vehicles.new
  @step.add_images_to_steps.new
  @makes = Make.all
  @models = MakeModel.where("make_id = ?", Make.first.id)
end
...

推荐答案

<%= @models.collect do |models| %>
  <option val="<%= models.id %>"><%= models.make_model_name %></option>
<% end %>

应该是

<% @models.collect do |models| %>
  <option val="<%= models.id %>"><%= models.make_model_name %></option>
<% end %>

当使用<％=％>时，它将结果打印在模板文件中。确保将其排除在循环之外，否则您将获得这些工件。

When you use the <%= %> it prints the result in the template file. Make sure to leave it out of your loops or you will get these artifacts.

这里有一些有关ERB标签的优质文档。

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