我有资源传记,添加新传记的视图和链接是:
= link_to "Add new bio", [:new, :admin, :bio]如果我像这样把resource :bio放到作用域中:
namespace :admin do
scope "/:bio_type", :defaults => {:bio_type => "company"} do
resources :bios
end
end这不管用
= link_to "Add new bio", [:new, :admin, :bio, { bio_type: params[:bio_type] }]我的问题是如何将作用域参数添加到url_for助手中?rails在默认情况下可以做到这一点吗?
附注:new_admin_bio_path({bio_type: params:bio_type})工作得很好,但它只是让人好奇
发布于 2012-07-17 17:50:41
我相信你不能将数组参数设置为link_to。您必须使用polymorphic_path或new_admin_bio_path({bio_type: params[:bio_type]})
原因是link_to使用[:new, :admin, :bio, { bio_type: params[:bio_type] }]调用url_for,后者使用这些参数调用polymorphic_path。
检查url_for和polymorphic_url的源代码。请注意,polymorphic_url接受两个参数- record_or_hash_or_array和options,但url_for仅使用一个参数调用它。
def url_for(options = {})
options ||= {}
case options
when String
options
when Hash
options = options.symbolize_keys.reverse_merge!(:only_path => options[:host].nil?)
super
when :back
controller.request.env["HTTP_REFERER"] || 'javascript:history.back()'
else
polymorphic_path(options)
end
end
def polymorphic_path(record_or_hash_or_array, options = {})
polymorphic_url(record_or_hash_or_array, options.merge(:routing_type => :path))
end
def polymorphic_url(record_or_hash_or_array, options = {})
if record_or_hash_or_array.kind_of?(Array)
record_or_hash_or_array = record_or_hash_or_array.compact
if record_or_hash_or_array.first.is_a?(ActionDispatch::Routing::RoutesProxy)
proxy = record_or_hash_or_array.shift
end
record_or_hash_or_array = record_or_hash_or_array[0] if record_or_hash_or_array.size == 1
end
record = extract_record(record_or_hash_or_array)
record = convert_to_model(record)
args = Array === record_or_hash_or_array ?
record_or_hash_or_array.dup :
[ record_or_hash_or_array ]
inflection = if options[:action] && options[:action].to_s == "new"
args.pop
:singular
elsif (record.respond_to?(:persisted?) && !record.persisted?)
args.pop
:plural
elsif record.is_a?(Class)
args.pop
:plural
else
:singular
end
args.delete_if {|arg| arg.is_a?(Symbol) || arg.is_a?(String)}
named_route = build_named_route_call(record_or_hash_or_array, inflection, options)
url_options = options.except(:action, :routing_type)
unless url_options.empty?
args.last.kind_of?(Hash) ? args.last.merge!(url_options) : args << url_options
end
args.collect! { |a| convert_to_model(a) }
(proxy || self).send(named_route, *args)
end因此,使用scope选项进行正确的调用应该听起来像这样
polymorphic_path([:new, :admin, :bio], bio_type: params[:bio_type])https://stackoverflow.com/questions/11519782
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