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http://guides.rubyonrails.org/v3.0.8/action_controller_overview.html#the-flash如何在页面显示controller里的错误提示,The flash is a special part of the session which... 阅读全文
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form_tag(url_for_options = {}, options = {}, *parameters_for_url, &block)Starts a form tag that points the action to an url configured with url_for_op... 阅读全文
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google login page 阅读全文