rails retrieving button_to parameter in the controller

Question

I iterate over an array of CartItem class I created and populate a view file.

<td><%= button_to "remove", :action => :remove_from_cart, :id => cart_item %></td>

I would like to be able to get a CartItem instance from params[:id] in the remove_from_cart. param[:id] returns something like "#<CartItem:0xb77a3dcc>":String and i could not figure out how to treat it like a CartItem object.

I know the code above works for objects descending from ActiveRecord::Base, and CartItem does not descend from it. I am guessing that might be the reason.

any pointers would be much appreciated, thanks

Harish Shetty · Accepted Answer · 2010-03-07 02:31:50Z

1

Change the code to pass a CartItem id instead of a CartItem object. If we assume CartItem class has a method called id then following code should work.

<%= button_to "remove", :action => :remove_from_cart, :id => cart_item.id %>

answered Mar 7, 2010 at 2:31

Harish Shetty

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2 Comments

artsince Over a year ago

Thank you for your answer. So, should I assume that it is not possible to pass objects as parameters unless they descend from ActiveRecord::Base ?

Harish Shetty Over a year ago

Yes. Code treats the ActiveRecord::Base classes as special classes.

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