Are variables nested in wildcards possible?

[anothertal3]

Hello and thank you for a very useful extension.

I've recently stumbled about a usecase which I'm unable to solve on my own.

Here's a simplified example using the following wildcards file (*.yaml):

cars:
  ford:
    name:
      - Ford
    types:
      - muscle car
      - compact car
      - roadster
    colors:
      - white
      - black
      - brown
      - red

  porsche:
    name:
      - Porsche
    types:
      - sports car
    colors:
      - red
      - black

  john_deere:
    name:
      - John Deere
    types:
      - tractor
    colors:
      - green
      - yellow  

Now I would like to generate dynamic images of cars with consistent and matching colors, e.g.:

• a tractor made by John Deere, standing in a rusty old workshop, green
• a sports car made by Porsche, standing in a rusty old workshop, red
• a roaster made by Ford, standing in a rusty old workshop, white

I hoped that something along the following lines would work:

${car=!{ford|porsche|john_deere}}
a __cars/${car}/types__ made by __cars/${car}/name__, standing in a rusty old workshop, __cars/${car}/colors__

But this only results in an exception. I've made similar attempts but wasn't successful.

Is something like this even supported? Or can it be achieved by using a workaround/different structuring?

Thank you!

[adieyal]

That's a nice idea - unfortunately the standard syntax doesn't support it because the string is only parsed once. The${car} token becomes a literal and the prompt generator sees __cars/${car}/types__ without the variable being resolved. You can use jinja2 templates to make it work. It's a little clunky but gets the job done:

# first choose the car
{% set car = choice("ford", "porsche", "john_deere" ) %}

# now create strings for the wildcards, e.g. __cards/ford/__types__
{% set car_types = '__cars/' ~ car ~ '/types__' %}
{% set car_names = '__cars/' ~ car ~ '/name__' %}
{% set car_colors = '__cars/' ~ car ~ '/colors__' %}

# finally, create the final prompt
a {{ random_sample(car_types) }} made by {{ random_sample(car_names) }}, standing in a rusty old workshop, {{ random_sample(car_colors) }}

[adieyal]

I've create an issue to add this functionality since it's a pretty logical expectation - #614

[anothertal3]

It took me a moment to find the "jinja2"-checkbox but your example worked perfectly.

Thank you for the quick and helpful response and for being so open-minded the idea!

[anothertal3]

Thanks to your suggestion I've started to research jinja and I'm absolutely baffled by the possibilities this opens up for prompting.

This is positively a gamechanger, at least for me. Thanks again :)