On Mar 27, 2012, at 8:46 PM, Cluter Vipic wrote:
> Thanks for the answers,
>
> follow the source web page, I have:
>
> <label for="table_basket">Basket</label>
> <select id="table_basket" name="table[basket]"><option value="">Please
> select</option>
> <option value="1">Awesome</option>
> <option value="2">Normal</option></select>
>
> <label for="table_apple">Apple</label>
> <select id="table_apple" name="table[apple]"><option value="">Please
> select</option>
> <option value="1">Green</option>
> <option value="1">Red</option>
> <option value="2">Yellow</option>
> <option value="2">White</option></select>
>
> <input name="commit" type="submit" value="Create Table" />
>
> To works I have to pass the right variable in the follow line
>
> options = $(apple).filter("[label=#{basket}]").html()
>
> I think the problem is here: label=#{basket}] that variable gone be 1 o
> 2 (check out the option=value in <select id="table_apple"
> name="table[apple]"> menu) this value is function of the Basket choice
>
> well I think its only this the problem in the
> app/assest/javascript/table.js.coffee file but I don't know if it's only
> a
> simple syntax error
>
> jQuery ->
> apple = $('#table_apple').html()
> $('#table_basket').change ->
> basket = $('#table_basket :selected').text()
> options = $(apple).filter("[label=#{basket}]").html()
> if options
> $('#table_apple').html(options)
You can't just do this, not unless behind the scenes, jQuery is imputing that
the array is an array of select options, and that the target is a select, and
is magic-ly and silently doing the Right Thing™ and building new Option objects
and inserting them in the select. Really, I'm not kidding here, this is not
going to work in any or many browsers.
I would love to be wrong about this, but as far as I know, you MUST:
1. Zero the length of the select object.
2. One at a time, create a new Option object, assign it the desired value and
text, and add it to the select's options array.
After you have done those things, in that order, you will have a working select
with the new options.
I know it doesn't look cool to have that old-school bare JavaScript hanging out
in your CoffeeScript, but really, needs must.
> else
> $('#table_apple').empty()
>
> thanks a lot anyway
You're welcome,
Walter
>
> C
>
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