Rails - passing parameters in link to

Question

My Accounts index page lists all accounts  and per account has a link to    Service   this should direct the user to the  my services new page and have pre-populated the account id field with the appropriate ID  depending on which link was clicked on the Accounts index page   I have debug params  at the bottom of every page  and with what I m trying  I m not getting anything other than  controller and  action showing up in my parameters for the  my services new page   The link I ve been trying is this   link to    Service    my services new    account id   gt  acct id   I then also have logic in the services controller   def new    my service   MyService new   if params  account id       my service account id   params  account id    end end   Can someone help with the proper way of doing this  I haven t yet been able to get it going with with a few nasty little hacky things I tried   EDIT  Turns out  if someone is looking at this answer in future  nested resources  possibly with the shallow  true option in routes rb  seem to be the way to go  My routes rb for this part now looks like this   resources  accounts  shallow  true do   resources  services end   My links now look like this    lt    link to    Service   new service path  service   gt     account id   gt   account id       gt

User · Answer

link to    Service   controller action path  account id   gt  acct id    If it is still not working check the path     rake routes

User · Answer

First of all  link to is a html tag helper  its second argument is the url  followed by html options  What you would like is to pass account id as a url parameter to the path  If you have set up named routes correctly in routes rb  you can use path helpers   link to    Service   new my service path  account id   gt  acct id    I think the best practice is to pass model values as a param nested within    link to    Service   new my service path  my service   gt     account id   gt  acct id       my services controller rb def new    my service   MyService new params  my service   end   And you need to control that account id is allowed for  mass assignment   In rails 3 you can use powerful controls to filter valid params within the controller where it belongs  I highly recommend    http   apidock com rails ActiveModel MassAssignmentSecurity ClassMethods  Also note that if account id is not freely set by the user  e g   a user can only submit a service for the own single account id  then it is better practice not to send it via the request  but set it within the controller by adding something like    my service account id   current user account id    You can surely combine the two if you only allow users to create service on their own account  but allow admin to create anyone s by using roles in attr accessible   hope this helps

User · Answer

Try this  link to    Service   my services new path  account id   gt  acct id    it will pass the account id as you want   For more details on link to use this http   api rubyonrails org classes ActionView Helpers UrlHelper html method-i-link to

[ruby-on-rails] Rails - passing parameters in link_to

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