conditional boolean attributes

[iceripple]

You often need to set boolean attributes (checked, selected,disabled) conditionally in a template

in Haml you can do something like:

%input{:selected => false}

which will evaluate to:

<input>

of course, Hamlpy cannot do this as it doesn't have access to runtime variables. a line like:

%button{'disabled' : ={button_disabled}}

wlll always result in a disabled button, whatever the value of button_disabled

Any better solutions than the ones I have come up with?

-if next_disabled
    %button{'disabled':'disabled'} Next...
-else
    %button Next...

very un-dry, especially if the element has a lot more attributes Or just insert raw django template stuff:

<button {% if next_disabled %}disabled="disabled"{% endif %}>Next…</button>

being somewhat counter-intuitive when you have elected to use Haml

[D3X]

Take a look at my fork: https://github.com/D3X/HamlPy I added support for conditional attributes. It's not production-ready yet, i hope to clean it up soon. Don't forget to:

1. install pyparsing if you want to use this fork
2. tell me what's broken :)

[peterbehr]

I would love to see this supported, @D3X any chance the change you made to your fork could easily be submitted as a pull request to the parent repo? (I could use your fork personally, but not on any of the collaborative projects I'm working on that could use this feature.)

[skatenerd]

:+1:

[jlward]

+1

[D3X]

@peterbehr @skatenerd @jlward Better late than never, I guess: https://github.com/jessemiller/HamlPy/pull/172 Now you have to push @jessemiller to merge it upstream :)