This weekend I found myself caught in a love\/hate relationship with a certain method in rails. I love this method because it uses some sort of mind control to know exactly when to show a link and when to show text. This method I speak of is UrlHelper.link_to_unless_current. My beef is not with this method directly, but the underlying UrlHelper.current_page?. <\/p>\n
What dissapponted me about this method was the inability to exclude certain parameters from the check. The reason why this is important is because I may not want the “page” variable to be considered when verifying if the current url is the one in the link_to statement. So I ended up adding an overriding the current_page? method and this is what I ended up with:<\/p>\n
\r\n\r\n def current_page?(options, excluding = {})\r\n url_string = CGI.escapeHTML(url_for(options))\r\n request = @controller.request\r\n\r\n if url_string =~ \/^\\w+:\\\/\\\/\/\r\n url_string == \"#{request.protocol}#{request.host_with_port}#{request.request_uri}\"\r\n else\r\n parameters = request.parameters\r\n\r\n excluding.each do |key|\r\n parameters.delete(key)\r\n end\r\n\r\n request_string = CGI.escapeHTML(url_for(parameters))\r\n url_string == request_string\r\n end\r\n end\r\n<\/code>\r\n<\/pre>\nI basically copied and pasted the current_page? code from the rails repository. With a few modifications. First I grabbed the collection of request.parameters and removed any items that are in the excluding list. Then I rebuilt the url using the url_for method.<\/p>\n
With this modification it made it very easy to make link_to_unless_current_with_paging:<\/p>\n
\r\n def link_to_unless_current_with_paging(name, options = {}, html_options = {}, *parameters_for_method_reference, &block)\r\n link_to_unless current_page?(options, ['page']), name, options, html_options, *parameters_for_method_reference, &block\r\n end\r\n<\/code><\/pre>\nHope this helps someone else out there that is getting frustrated with link_to_unless_current. What would be really nice is if this worked its way into the repository. Maybe I will get the nerve to make a patch, and be rejected.<\/p>\n","protected":false},"excerpt":{"rendered":"
This weekend I found myself caught in a love\/hate relationship with a certain method in rails. I love this method because it uses some sort of mind control to know exactly when to show a link and when to show … Continue reading