Chameleon2 lost inline Boolean attributes (without tal:attributes) about chameleon

[dnouri]

Hmm, what is possible however is this:

<input type="checkbox"
       name="foo"
       checked="${cond and 'checked' or None}" />

I guess this does have to do with the recently removed "boolean attributes" feature after all. Close?

[malthe]

It should definitely work.

What might happen is that your cond is simply a false value. That
drops the attribute (which is different than what you get in
zope.pagetemplate). In addition, a value of None also drops the
attribute, but that's probably expected.

On 5 September 2011 13:17, dnouri
[email protected]
wrote:

Something that used to work in Chameleon 1 was:

     <input type="checkbox"
            name="foo"
            checked="${cond and 'checked'}" />

I thought this inline feature was actually quite neat. What I need to do instead in Chameleon 2 is:

     <input type="checkbox"
            name="foo"
            tal:attributes="checked cond and 'checked'" />

Is this a bug?

Reply to this email directly or view it on GitHub:
#48

[dnouri]

Are you sure that checked="${cond}" will drop the attribute if it's False? It only seems to work with None.

[malthe]

It will (should, according to the tests) in Chameleon, unless the literal_false setting is given.

Note that in Zope (i.e. via z3c.pt), this parameter is given.

[malthe]

You're right.

It won't drop the attribute, but that's because the ${...} operator always returns a string value. But perhaps the result should be an attribute with an empty string in it.

[dnouri]

On Wed, Sep 14, 2011 at 12:49 PM, Malthe Borch
[email protected]
wrote:

You're right.

It won't drop the attribute, but that's because the ${...} operator always returns a string value. But perhaps the result should be an attribute with an empty string in it.

Aha. My point was also that it used to work in Chameleon 1. But don't
worry, I can live with it.

http://danielnouri.org
[phone]

[malthe]

Can you take a look at the (updated) test that I just committed. Doesn't this demonstrate (although slightly awkwardly) that it does work?

[dnouri]

It does. I'm surprised. This happened to me in the latest Kotti btw. I'll check again when I get around to it.