Hmm, I understand what you are saying, and that is indeed what I tried
to do originally but because I am not loading the edit page first I am
pretty sure I cannot use the form_for method. The form_tag that I am
using appears to parse the fields correctly however the data is not
being processed correctly on the backend...
Parameters: {"commit"=>"Update", "action"=>"update",
"barcode"=>"123456789", "checkout"=>"1", "controller"=>"books"}
I am able to type the barcode in and hit update but I am being taken to
the update page rather than just processing the update method. I know
it is reading the hash correctly because if I change the barcode I am
getting a nil value error. Like you said, my form is simple (this is in
my index.erb.html file),
<% form_tag(:action => "update") do -%>
<fieldset>
<legend>Process Return</legend>
<label>Barcode</label><%= text_field_tag 'barcode' %><br>
<label>Check Out?</label><%= check_box_tag 'checkout' %>
</fieldset>
<p>
<%= submit_tag "Update" %>
</p>
<% end -%>
You have already seen my controller; there isn't much here so I must be
doing something pretty stupid... Thanks,
Colin Law wrote:
> On 29 March 2010 19:00, Stephen None <[email protected]> wrote:
>> �def update
>>
>> � �...@barcode = params[:barcode]
>> � �...@checkout = params[:checkout]
>>
>> � �...@book = Book.find(:first, :conditions => {:barcode => [...@barcode]})
>>
>> � �[email protected]_attributes(params[:book])
>>
>> �end
>
> Just use the same technique as on the edit page but miss out the
> fields that you do not wish to change. Then submit to the existing
> update action, you do not need to change it as update_attributes only
> changes the fields that are provided, and leaves the others unchanged
> (I think that is correct, someone will correct me if I am wrong).
> Depending on how similar the required view is to the normal edit view
> you may even be able to use the same one, just hiding the fields you
> do not want.
>
> By the way form_for is the conventional way now, rather than form_tag.
> Your edit view will likely be using that unless you picked up the
> code from an old tutorial or book.
>
> Colin
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