[英]Rails: after rendering partial with Ajax, manipulating that partial with JS
[英]Undefined form variable when rendering a partial in rails after an AJAX call
我已经尝试了一段时间,以在Rails 4.0中使用AJAX实现动态相关的表单。 我有一个bike
哪种模式has_one
make
和model
。 它还has_many
quotes
。 我们的目标是有第二种形式的集合场( model
)的第一个字段后填充make
选择。
一旦选择了第一个字段,表单将正确加载并调用AJAX并返回适当的数据集(通过控制台中的puts确认)。 但是,我无法弄清楚如何适当地渲染部分。 我收到下面的错误。 我知道一旦通过AJAX调用呈现了部分变量,就没有f变量了,但是我该如何设计没有f变量的表单呢?
ActionView::Template::Error (undefined local variable or method `f' for #<#<Class:0x007f95b0fc2068>:0x007f95b54e2490>):
1: <%= f.label :name, 'Model' %>
2: <% if !current_models.blank? %>
3: <%= f.collection_select :name, current_models.collect{ |m| [m.name,m.id]}, :id , :name, include_blank: true %>
4: <% else %>
app/views/shared/_model_questions_fields.html.erb:1:in `_app_views_shared__model_questions_fields_html_erb__894239665582553972_70140482609500'
app/controllers/quotes_controller.rb:70:in `update_model_select'
报价/ new.html.erb
<%= form_for @quote do |f| %>
<%= f.fields_for :bikes do |builder| %>
<p><%= render 'shared/bike_questions_fields', :f => builder %></p>
<% end %>
<%= f.submit "Show Quote", class: "btn btn-large btn-primary" %>
<% end %>
的共享/ bike_questions_fields'
<%= f.fields_for :makes do |builder| %>
<p><%= render 'shared/make_questions_fields', :f => builder %></p>
<% end %>
<%= f.fields_for :models do |builder| %>
<div id="bikeModels"
<p><%= render 'shared/model_questions_fields', :f => builder, :current_models => [] %></p>
</div>
<% end %>
的共享/ model_questions_fields'
<%= f.label :name, 'Model' %>
<% if !current_models.blank? %>
<%= f.collection_select :name, current_models.collect{ |m| [m.name,m.id]}, :id , :name, include_blank: true %>
<% else %>
<%= f.collection_select :name, [], :id , :name, include_blank: true %>
<% end %>
在报价控制器中:
def update_model_select
models = Model.where(:make_id=>params[:id]).order(:name) unless params[:id].blank?
render :partial => "shared/model_questions_fields", :locals => { :current_models => models }
end
在quotes.js.coffee中:
ready = ->
jQuery ($) ->
# when the #make field changes
$("#quote_bikes_makes_name").change ->
# make a POST call and replace the content
make = $("select#quote_bikes_makes_name :selected").val()
make = "0" if make is ""
jQuery.get "/quotes/update_model_select/" + make, (data) ->
$("#bikeModels").html data
false
$(document).ready(ready)
$(document).on('page:load', ready)
我通过将'shared/model_questions_fields'
更改为:
<%= form_for('quote', remote: true) do |f| %>
<%= f.fields_for :bikes do |g| %>
<%= g.fields_for :models do |i| %>
<%= i.label :name, 'Model' %>
<% if !current_models.blank? %>
<%= i.collection_select :name, current_models, :id , :name, include_blank: true %>
<% else %>
<%= i.collection_select :name, [], :id , :name, include_blank: true %>
<% end %>
<% end %>
<% end %>
<% end %>
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