render不會去執行controller中的action方法,直接渲染相應的頁面文件,可以使用的。參數如下:
[ruby] view plain copy
render(:text => string)
render(:inline => string, [:type => "rhtml"|"rxml"])
render(:action => action_name)
render(:file => path, [:use_full_path => true|false])
render(:template => name)
render(:partial => name)
render(:nothing=>true)
render()
第1行:直接渲染出文本
第2行:把傳入的string渲染成模板(rhtml或者rxml)
第3行:直接調用某個action的模板,相當於forward到壹個view
第4行:使用某個模板文件render, 當use_full_path參數為true時可以傳入相對路徑
第5行:使用模板名render,e.x.: render(:template => "blog/short_list")
第6行:以局部模板渲染
第7行:什麽也不輸出,包括layout
第8行:默認的的render, 相當於render(:action => self)
Redirect是跳轉到壹個新的action中繼續執行,相當於瀏覽器發送了壹個新的請求,並且默認返回302狀態碼。例如:
[ruby] view plain copy
def redirect_to(options = {}, response_status = {}) #:doc:
raise ActionControllerError.new("Cannot redirect to nil!") if options.nil?
if options.is_a?(Hash) && options[:status]
status = options.delete(:status)
elsif response_status[:status]
status = response_status[:status]
else
status = 302
end
response.redirected_to = options
case options
# The scheme name consist of a letter followed by any combination of
# letters, digits, and the plus ("+"), period ("."), or hyphen ("-")
# characters; and is terminated by a colon (":").
when %r{^\w[\w\d+.-]*:.*}
redirect_to_full_url(options, status)
when String
redirect_to_full_url(request.protocol + request.host_with_port + options, status)
when :back
if referer = request.headers["Referer"]
redirect_to(referer, :status=>status)
else
raise RedirectBackError
end
else
redirect_to_full_url(url_for(options), status)
end
end