On Sun, Sep 13, 2009 at 12:30 PM, Dudebot <[email protected]> wrote:
> > Sorry for this basic noob question: > > I have an "Item" class in my models which corresponds to a SQL table, > and a "Cart" class and a "CartItem" class which do not. The Item > class does not have an amount object, which is transitory, so I've put > this amount object in my CartItem class: > > class CartItem > > attr_reader :item, :amount > > def initialize( item ) > @item = item > end > > def set_amount( amount ) > This.amount = amount > end > > end > > I have a list of items in a viewer form, and I'd like to pass > associated amount to my CartItem when the user hits the "Add to Cart" > button. I've tried many variations of text_field and text_field_tag > in: > > <% @items.each do |item| %> > ... > <%= text_field( :amount , :action => 'set_amount( :amount > )', :id => > item )%> > <%= button_to "Add to Cart" , :action => 'add_to_cart', :id > => item > %> > ... > <% end %> > > I know the text_field up there is severely mangled and won't work--but > it's an example of the 2000th try, the last several hundred out of > pure desperation. Can anyone help with the proper syntax for the > text_field in the .html.emb file? > > The add_to_cart call with the button is working: > > def add_to_cart > item = Item.find( params[ :id ] ) > @cart = find_cart > @cart.add_item( item ) > end > > Many TIA, > Craig > The text_field view helper generates an HTML input tag. Thus, there's no attribute on the input tag called 'action' in the X/HTML spec. Next, when to use text_field and text_field_tag? text_field: if you're creating or updating a model. text_field_tag: if you're NOT creating or updating a model. Thus, I'm guessing that you're simply updating a session variable when you're performing the @cart.add_item( item ) If this is the case, then you should use text_field_tag within a form_tag. You can see example usage of 'form_tag' and 'text_field_tag' here: http://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html#M001729 If you are in fact creating or updating a model, then you should use test_field within a form_for. You can see examples usage of 'form_for' and 'text_field' here: http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#M001607 Finally, I would recommend getting access to a copy of "Agile Web Development with Rails 3rd ed" and/or obtaining the really great screencasts on the subject, "Mastering Rails Form", http://www.pragprog.com/screencasts/v-rbforms/mastering-rails-forms Good luck, -Conrad > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
