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我正在尝试使用 AJAX 呈现表单。非 ajax 版本可以正常工作,但 ajaxified 版本不能。它的链接在 index.html.erb 中。Webrick 服务器显示:

在 2012-11-19 17:19:27 -0500 开始 GET "/categories/3/new_sub" for 127.0.0.1
由 CategoriesController#new_sub 作为 JS
参数处理:{"id"=>"3"}
类别负载(0.1 ms) SELECT "categories".* FROM "categories" WHERE "categories"."id" = ? LIMIT 1 [["id", "3"]]
渲染类别/_form.html.erb (1.8ms)
渲染类别/new_sub.js.erb (3.6ms)
8ms 内完成 200 OK (Views: 6.3ms | ActiveRecord: 0.1毫秒)

这是我的类别控制器:

# GET /categories
# GET /categories.json
def index
  @categories = Category.roots

  respond_to do |format|
    format.html # index.html.erb
    format.json { render json: @categories }
  end
end

# GET /categories/1/new_sub.html
# GET /categories/1/new_sub.js
def new_sub
  @parent = Category.find(params[:id])
  @category = Category.new

  respond_to do |format|
    format.html
    format.js
  end
end

index.html.erb:

<h1>Listing categories</h1>

<%= recurse_categories(@categories) %>

<br />

<%= link_to 'New Category', new_category_path %>

recurse_categories 助手:

def recurse_categories(cats)
  s = "<ul>"
  cats.each do |cat|
    s << "<li id=\"#{cat.id}\">#{link_to cat.name, new_sub_category_path(cat), remote: true}</li>"
    if cat.has_children?
      s << recurse_categories(cat.children)
    end
  end
  s << "</ul>"
  s.html_safe
end

new_sub.js.erb:

$('ul').after(<%= render partial: "form", locals: { parent: @parent, category: @category } %>);

_form.html.erb:

<%= form_for(category) do |f| %>

  <div class="field">
    <%= f.text_field :name  %>
    <%= f.hidden_field :ancestry, value: "#{parent.ancestry + '/' + parent.id.to_s}" %>
    <%= f.submit "Create subcategory" %>
  </div>

<% end %>
4

2 回答 2

1

您的“ul”标签在类别错误的条件块下。您确定要将您的回复附加到“error_explanation”div 中吗?

你可以有一个 span 标签并在 new_sub.js.erb 中使用它

<div class="field">

 <span id="subcat"/>     

<%= f.text_field :name  %>
<%= f.hidden_field :ancestry, value: "#{parent.ancestry + '/' + parent.id.to_s}" %>
<%= f.submit "Create subcategory" %>

于 2012-11-19T23:39:17.123 回答
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解决它!我只是忘记了 jquery 选择器和参数周围的引号,DUH!

于 2012-11-20T01:14:57.893 回答