我最近使用http:// github.com/timriley/complex-form-examples构建了一个相当深的嵌套表单作为指导。表单部分使用以下内容以便在单击链接时呈现新字段:
<%= yield :warehouses_fields_template %>
<%= yield :ratgrades_fields_template %>
这些内容在ApplicationHelper中生成:
def new_child_fields_template(form_builder, association, options = {})
content_for "#{association}_fields_template" do
options[:object] ||= form_builder.object.class.reflect_on_association(association).klass.new
options[:partial] ||= association.to_s.singularize
options[:form_builder_local] ||= :f
content_tag(:div, :id => "#{association}_fields_template", :style => "display: none") do
form_builder.fields_for(association, options[:object], :child_index => "new_#{association}") do |f|
render(:partial => options[:partial], :locals => {options[:form_builder_local] => f})
end
end
end unless content_given?("#{association}_fields_template")
end
def content_given?(name)
content = instance_variable_get("@content_for_#{name}")
! content.nil?
end
一切似乎都在rails 2.3.8上完美运行,但是今天升级到Rails 3 rc后,模板不再加载了。有什么改变会使上面的代码无效吗?还有其他人注意到同样的问题吗?
任何帮助将不胜感激, 谢谢!
作为参考,这也是相关的jQuery代码:
$(function() {
$('form a.add_child').live('click', function() {
// Setup
var assoc = $(this).attr('data-association'); // Name of child
var content = $('#' + assoc + '_fields_template').html(); // Fields template
// Make the context correct by replacing new_<parents> with the generated ID
// of each of the parent objects
var context = ($(this).parents('.fields').children('input:first').attr('name') || '').replace(new RegExp('\[[a-z]+\]$'), '');
// context will be something like this for a brand new form:
// project[tasks_attributes][1255929127459][assignments_attributes][1255929128105]
// or for an edit form:
// project[tasks_attributes][0][assignments_attributes][1]
if(context) {
var parent_names = context.match(/[a-z]+_attributes/g) || []
var parent_ids = context.match(/[0-9]+/g)
for(i = 0; i < parent_names.length; i++) {
if(parent_ids[i]) {
content = content.replace(
new RegExp('(\\[' + parent_names[i] + '\\])\\[.+?\\]', 'g'),
'$1[' + parent_ids[i] + ']'
)
}
}
}
// Make a unique ID for the new child
var regexp = new RegExp('new_' + assoc, 'g');
var new_id = new Date().getTime();
content = content.replace(regexp, new_id)
$(this).parent().before(content);
return false;
});
});
如果它有帮助,我已经在其中包含了一些Gist以及更多相关页面:http://gist.github.com/536704
答案 0 :(得分:5)
陷入同样的问题。在rails 3中,您现在必须使用符号。所以使用:
content_for :"#{association}_fields_template" do
和
end unless content_for?(:"#{association}_fields_template")
(删除无用的content_given?
方法,该方法现在是内置的content_for?
)。
也可以使用
<%= content_for :warehouses_fields_template %>
<%= content_for :ratgrades_fields_template %>
而不是
<%= yield :warehouses_fields_template %>
<%= yield :ratgrades_fields_template %>