Parameterized prompts with more than one parameter do not display evaluated prompt

[demoran23]

What's wrong

My prompt looks like this:

${subject=!he-man} 
${features=!with immaculate shoulder-length blonde hair}
${details=!with a fervent look in his eye}
${pose=!brandishing a sword above his head}
${setting=!a rocky crevasse}
${background=!greyskull castle looms in the background}

__promptgeek/prompt()__

I iterated over immediate evaluation (ie ! vs no !) and invoking the prompt vs not invoking it (ie prompt() vs prompt). I'm still left with metadata that looks like this:

Prompt: ${subject=!he-man}
${features=!with immaculate shoulder-length blonde hair}
${details=!with a fervent look in his eye}
${pose=!brandishing a sword above his head}
${setting=!a rocky crevasse}
${background=!greyskull castle looms in the background}
__promptgeek/prompt()__
Steps: 16 | Seed: 1362315855 | Sampler: DPM++ 2M Karras | CFG scale: 6 | Size: 768x768 | Parser: Full parser | Model: sd15_photorealistic_juggernaut_aftermath | Model hash: ba12f15e72 | VAE: vae-ft-mse-840000-ema-pruned | Latent sampler: UniPC | Image CFG scale: 6 | Denoising strength: 0.3 | Refiner start: 0.5 | Secondary steps: 20 | Version: 42c6147 | Pipeline: Original | Operations: "txt2img | hires" | CFG Rescale phi: 0 | Hires upscale: 1.5 | Hires steps: 20 | Hires upscaler: 4x-UltraSharp | Score: 6.97

The promptgeek prompt looks like this:

      __photorealistic/style__ photo of ${subject},
      ${features},
      ${details},
      ${pose},
      ${action},
      __photorealistic/framing__,
      ${setting},
      ${background},
      __photorealistic/lighting__,
      __photorealistic/camera/angle__,
      __photorealistic/camera/properties/shot_on**__,
      {1-$$__photorealistic/camera/properties/film_type__
        |__photorealistic/camera/properties/lens__
        |__photorealistic/camera/properties/filters_and_effects__},
      {3::_|1::in the style of __photorealistic/photographer__}

What works

When I comment out all of the other variables besides the subject, it works as expected:

instant photo photo of he-man,
 
head shot,
 
soft fill lighting,
shot from a Dutch angle,
shot on Hasselblad 500CM,
Fujicolor Pro
  ,soft focus,
photorealistic,photographer

Steps: 16, Seed: 2639461381, Sampler: DPM++ 2M Karras, CFG scale: 6, Size: 768x768, Parser: Full parser, Model: sd15_photorealistic_era09_v10, Model hash: d03946b93d, VAE: vae-ft-mse-840000-ema-pruned, Latent sampler: UniPC, Image CFG scale: 6, Denoising strength: 0.3, Refiner start: 0.5, Secondary steps: 20, Version: 42c6147, Pipeline: Original, Operations: "txt2img, hires", CFG Rescale phi: 0, Hires upscale: 1.5, Hires steps: 20, Hires upscaler: 4x-UltraSharp, Score: 7.07, Hashes: {"vae": "735e4c3a44", "model": "d03946b93d"}

Re-enabling any of the other parameters causes the issue to happen again.

Without the actual resolved prompt being displayed, I have no idea what the prompt was that generated the image.

[demoran23]

I've done some more investigation here, and changed my prompt to fix the issue.

It was blowing up because I either didn't specify default values for parameters and then omitted them.

The updated wildcard that works as expected:

      __photorealistic/style__ photo of ${subject:_},
      ${features:_},
      ${details:_},
      ${pose:_},
      ${action:_},
      __photorealistic/framing__,
      ${setting:_},
      ${background:_},
      __photorealistic/lighting__,
      __photorealistic/camera/angle__,
      __photorealistic/camera/properties/shot_on**__,
      {1-$$__photorealistic/camera/properties/film_type__
        |__photorealistic/camera/properties/lens__
        |__photorealistic/camera/properties/filters_and_effects__},
      {3::_|1::in the style of __photorealistic/photographer__}

[adieyal]

What do you think would be a more reasonable approach to dealing with this:

1. More explicit error message in the console
2. Warning in the console and defaulting values to an empty string 3

[demoran23]

I think the parameterized invocation syntax template(x=abc) should accept multiple parameters.

The behavior of parameters should be documented

Throw an exception if any required parameters are missing that prevents the generation from proceeding