pass parameter by link_to ruby on rails

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 pleas开发者_开发百科e?

@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.

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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

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The above did not work for me but this did

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

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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 (i.e., the rest of the view).

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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"?