pass parameter by link_to ruby on rails

Question

I have this line of code:

<%= link_to "Add to cart", :controller => "car", :action => "add_to_cart", :car => car %>

when im in the add_to_cart method...how can i call the :car please?

@car = Car.new(params[:car])

That doesn't work because it says that I'm trying to stringify it.

I don't understand what's wrong; because I used this to create new users and it worked fine.

By the way, car is my car object.

Answer 1

Try:

<%= link_to "Add to cart", {:controller => "car", :action => "add_to_cart", :car => car.id }%>

and then in your controller

@car = Car.find(params[:car])

which, will find in your 'cars' table (as with rails pluralization) in your DB a car with id == to car.id

hope it helps! happy coding

more than a year later, but if you see it or anyone does, i could use the points ;D

Answer 2

上面并没有为我工作， 但这并

<%= link_to "text_to_show_in_url", action_controller_path(:gender => "male", :param2=> "something_else") %>

Answer 3

Maybe try this:

<%= link_to "Add to cart", 
            :controller => "car", 
            :action => "add_to_cart", 
            :car => car.attributes %>

But I'd really like to see where the car object is getting setup for this page (ie, the rest of the view).

Answer 4

You probably don't want to pass the car object as a parameter, try just passing car.id . What do you get when you inspect(params) after clicking "Add to cart"?