On 19 Nov 2008, at 16:25, Supraja wrote:
>
> Hi everyone,
>
> I'm trying to update attributes in a collection passed to form_tag.
> However my syntax for extracting values from the params hash results
> in this exception:
>
> undefined method `keys' for ["Vanilla", "Rose", "Cranberry"]:Array
>
> So it appears I am trying to call keys on an array of "flavor"
> attribute values, rather than extracting "Candle" object id keys from
> the params hash. I have included the code from the view and controller
> below.
>
If you call your parameters candle[] then you will indeed get back a
single array parameter
if you wanted a hash keyed by id then you'd need parameters of the
form candle[some_id][flavor]. fields_for etc... may be able to help
you create those parameter names rather than having to bash them in by
hand.
Fred
> Thanks for taking the time to read this. I appreciate any specific
> suggestions, as well as any resources that explain the intricacies of
> params.
>
> Thank You!
> Supraja
>
> ----
> edit_all.html.erb:
> <% form_tag(:action => "update_candle_line") do %>
> <% for @candle in @candles %>
> <%= text_field_tag("candle[]", @candle.flavor) %>
> <% end %>
>
> <%= submit_tag "Update" %>
> <% end %>
>
> ----
> edit_all_controller.rb:
> def update_candle_line
> Candle.update(params[:candle].keys, params[:candle].values)
> redirect_to_index("Flavors updated!") # private method of
> controller
> end
>
> >
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