javascript - Ruby on Rails track location in background -

i started working ruby on rails 3 weeks ago, loving far need help.

i'm working on web app that, among others, tracks location of user , stores periodically in db. javascript getting location every minute working don't know how store location in db. script defined in application view. managed call update_location action defined in userscontroller using ajax post. lat long columns updated corectly page redirect occurs. want update process async , hidden user.

when tried using put ajax request (post _method=put) url not found user/:id/location_update.

i complete beginner ror , in web dev. p.s. using rails 4.

edit: using $.ajax or $.post _method : "put" , url /update_location triggers following 500 error

actionview::missingtemplate (missing template users/update_location, application/update_location {:locale=>[:en], :formats=>[...]}. searched in:   * "/home/.../app/views" ): 

my update_location action looks

  def update_location     @car = car.find(3)       if @car.update_attributes(location_params)       end   end 

the db getting updated still error.

i think want rails return jquery went well.. default it's trying render html jquery.

  def update_location     @car = car.find(3)     @car.update_attributes(location_params)     head :ok   end