我最近问过这个问题:Javascript Form Submition?
现在我想弄清楚为什么在表单提交后,create.js.erb没有加载最新数据(提交的数据)。
如果我再次提交数据,表格将使用倒数第二个数据进行更新,但不是最新数据。
...为什么?
修改
最新代码 -
分类控制器: class Admin :: CategoriesController<联系:: AdminController ...
def create
@category = Admin::Category.new(params[:admin_category])
# You can't retrieve the @categories before attempting to add new one. Keep at end of create method.
@categories = Admin::Category.all
respond_to do |format|
if @category.save
save_to_history("The category \"#{@category.name}\" has been created", current_user.id)
format.json { render json: { html: render_to_string(partial: 'categories') } }
# I've tried both the above and bellow
#format.json { render json: { html: render_to_string('categories') } }
format.html { redirect_to(admin_categories_url, :notice => 'Category was successfully created.') }
format.xml { render :xml => @category, :status => :created, :location => @category }
else
format.html { render :action => "new" }
format.xml { render :xml => @category.errors, :status => :unprocessable_entity }
end
end
end
...
end
使用Javascript:
<script type='text/javascript'>
$(function(){
$('#new_admin_category').on('ajax:success', function(event, data, status, xhr){
$("#dashboard_categories").html(data.html);
});
});
</script>
解决
我使用@PinnyM的方法并添加了一个create.json.erb文件,其中包含以下代码:
<% self.formats = ["html"] %>
{
"html":"<%= raw escape_javascript( render :partial => 'categories', :content_type => 'text/html') %>"
}
并将我的创建方法更改为:
def create
@category = Admin::Category.new(params[:admin_category])
respond_to do |format|
if @category.save
# You can't retrieve the @categories before attempting to add new one. Keep after save.
@categories = Admin::Category.all
save_to_history("The category \"#{@category.name}\" has been created", current_user.id)
format.json
format.html { redirect_to(admin_categories_url, :notice => 'Category was successfully created.') }
format.xml { render :xml => @category, :status => :created, :location => @category }
else
format.html { render :action => "new" }
format.xml { render :xml => @category.errors, :status => :unprocessable_entity }
end
end
end
如果这很乱,请提供建议。
答案 0 :(得分:1)
您需要处理远程(AJAX)提交的成功回调。 data
参数(第二个参数)保存响应:
$(function(){
$('#new_category').on('ajax:success', function(event, data, status, xhr){
eval(data);
});
});
更好的方法(并避免危险的eval
)可能只是返回部分,并让回调决定如何处理它:
# in create action
format.json { render json: { html: render_to_string('categories') } }
# in your js, run at page load
$(function(){
$('#new_category').on('ajax:success', function(event, data, status, xhr){
$("#dashboard_categories").html(data.html);
});
});
<强>更新强>
注意到@RomanSpiridonov所写的内容 - 他是绝对正确的。在尝试添加新类别之前,您无法检索@categories。将第@categories = ...
行移至create
方法的末尾。
另外,我注意到您的类别模型是命名空间 - 这意味着您的默认表单id
属性更像是'new_admin_category'。您应该检查它实际呈现的方式,并在注册成功回调时在jQuery选择器中使用该id:
$(function(){
$('#new_admin_category').on('ajax:success', function(...
答案 1 :(得分:1)
在保存新类别之前定义的方法“create”中的实例变量@categories。这就是为什么你无法在模板中收到最新类别的原因。 我想你可以这样写:
$("#dashboard_categories").append("<%= escape_javascript(render("category")) %>");
答案 2 :(得分:0)
您可以在assets/javascripts
文件夹
$(your_form_selector).on('ajax:success', function(){
// Read link to see what event names you can use instead of ajax:success and
// which arguments this function provides you.
})
要设置your_form_selector
,您可以在表单中添加ID并使用#myFormId
了解更多here