在我的Rails 3应用程序中,我允许用户为其个人资料添加奖励。使用Rails UJS我得到create
使用ajax。但是,我不能为我的生活destroy
工作。查看我的服务器日志,看起来它正在工作,但除非我刷新我的个人资料页面,否则不会删除@award
。
我使用的代码来自我在Beginning Rails 3中关注的教程。如果有人能帮我弄清楚我的代码中出错了什么,我会很感激。
我的awards_controller.rb
:
def create
@award = Award.new(params[:award])
if @award.save!
respond_to do |format|
#format.html { redirect_to profile_path(@profile) }
format.js { }
end
else
respond_to do |format|
#format.html { redirect_to profile_path(@profile)}
format.js { render 'fail_create_award.js.erb' }
end
end
end
def destroy
@award = Award.find(params[:id])
@award.destroy
respond_to do |format|
#format.html { redirect_to profile_path(@profile) }
format.js { render :nothing => true }
end
end
我的create.js.erb
:
$('ul#awardInfo').append("<%= escape_javascript(render(@award)) %>");
$('#new_award')[0].reset();
我的destroy.js.erb
:
$("ul#awardInfo<%= (@award) %>").remove();
我的表单删除奖励,如果奖项属于/由current_user
创建,则奖励旁边显示为“x”:
<li>- <%= award.body %><% if @profile = current_user.profile %><span class="delete"><%= link_to 'x', award_path(award), :method => :delete, :remote => true, :confirm => "Are you sure you want to remove this award?", :class => "delete_award" %></span><% end %></li>
在我的服务器日志中单击“删除”(但在刷新页面之前):
Started DELETE "/awards/8" for 127.0.0.1 at 2012-01-11 21:34:58 -0500
Processing by AwardsController#destroy as JS
Parameters: {"id"=>"8"}
Award Load (1.0ms) SELECT "awards".* FROM "awards" WHERE "awards"."id" = '8' LIMIT 1
SQL (0.2ms) BEGIN
SQL (1.4ms) SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull
FROM pg_attribute a LEFT JOIN pg_attrdef d
ON a.attrelid = d.adrelid AND a.attnum = d.adnum
WHERE a.attrelid = '"awards"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
AREL (0.6ms) DELETE FROM "awards" WHERE "awards"."id" = 8
SQL (2.3ms) COMMIT
Rendered text template (0.0ms)
Completed 200 OK in 31ms (Views: 1.3ms | ActiveRecord: 5.4ms)
更新:如果我从销毁操作中移除render :nothing => true
,则实际上并未删除奖励。我的日志显示以下内容:
Started DELETE "/awards/3" for 127.0.0.1 at 2012-02-03 07:54:34 -0500
Processing by AwardsController#destroy as JS
Parameters: {"id"=>"3"}
Award Load (238.1ms) SELECT "awards".* FROM "awards" WHERE "awards"."id" = '3' LIMIT 1
SQL (0.4ms) BEGIN
SQL (1.6ms) SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull
FROM pg_attribute a LEFT JOIN pg_attrdef d
ON a.attrelid = d.adrelid AND a.attnum = d.adnum
WHERE a.attrelid = '"awards"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
AREL (97.3ms) DELETE FROM "awards" WHERE "awards"."id" = 3
SQL (45.8ms) COMMIT
Rendered awards/destroy.js.erb (1.1ms)
Completed 200 OK in 954ms (Views: 531.9ms | ActiveRecord: 383.2ms)
更新2:如果我去检查HTML,会发生奇怪的事情:
<li>- test<span class="delete"><a href="/awards/4" class="delete_award" data-confirm="Are you sure you want to remove this award?" data-method="delete" data-remote="true" rel="nofollow">x</a></span></li>
<li>
是创建的实际奖励。我有一个award.rb
模型belongs_to :profile
。如果个人资料奖励属于我的个人资料,我会看到一个删除选项,这是<span>
的用途。
答案 0 :(得分:4)
将format.js { render :nothing => true }
放入destroy
行动可能会告诉Rails 不渲染 destroy.js.erb 。
使用format.js { }
操作中使用的相同create
应该指示Rails呈现 destroy.js.erb ,然后执行所需的操作。
<强>更新强>:
从上面的代码中可以看出,实际的奖励HTML中没有任何内容可用于选择remove
来电。
我建议确保li
元素包含带有奖励ID的ID属性。类似的东西:
<li id="award-<%= @award.id %>">
然后,要删除奖励,请选择其li
元素,然后按以下步骤删除:
$('li#award-<%= @award.id %>').remove();
在我看来,唯一剩下的问题是jQuery调用没有选择正确的元素或任何元素来调用remove on。为li
提供一个唯一ID,然后选择要删除的ID 应该使销毁操作正确呈现。