文本拼接丨V2

Structured prompts are the boring kind of power. You've got a formula - subject, pose, lighting, background - and you want to swap the variables without retyping the whole sentence every time. QING_PromptTemplate is the QING pack's text-slot filler: write a template with {var1} through {var8} placeholders, feed the values in, get the assembled text out. This is the "V2" version of the pack's text templating, and the placeholder syntax matters (see below).

What it does

template is the multiline text with up to eight placeholders. var1–var8 are the replacement strings. The node renders the template, substituting each placeholder with its variable - and here's the genuinely friendly bit: empty variables don't error. An empty {var3} just renders as an empty string, so a template with optional slots works without you having to wire up "only fill this when it exists" logic.

Outputs: 结果文本 (the rendered string), 缺失变量 (a CSV of which placeholders were left empty - so you can know when something didn't get filled), and a debug string with placeholder counts and replacement stats.

The V2 trap

The pack has two template nodes and their syntax is different: the older TextTemplateConcat ("文本拼接") uses {text1} through {text5}, while this one - QING_PromptTemplate, "文本拼接丨V2" - uses {var1} through {var8}. If you copy a template between them, {text1} won't render here. Both follow the "template as a message" pattern from the prompt-engineering doc - the LLM-era encoders read assembled text, so slot-filling works for any checkpoint's prompt box, tags or sentences.

Where you'd reach for it

Any structured, repeatable prompt: keep the skeleton as the template, and wire var1–var8 from whatever's driving the variation - a QING_PromptRandomizer roll, a batch item, a text list, a shared variable node. It's also the cheap way to build filename templates and log strings, since it's just text substitution. Output plugs straight into a CLIP Text Encode or an API node's text input.

Installing it

cd ComfyUI/custom_nodes
git clone https://github.com/GAO-SHIQING/ComfyUI-QING
cd ComfyUI-QING
python install_dependencies.py

Restart ComfyUI after. Pure regex-based substitution, zero dependencies. Manager: search "ComfyUI-QING." (README's GAOSHI-QING clone-URL typo - repo is GAO-SHIQING/ComfyUI-QING.)

Things to know

The regex that finds placeholders matches {word} patterns, so a stray literal {braces} in your template will be picked up as a placeholder (and reported as missing when empty) - it renders as blank, not as the literal text. If you need literal braces, know that going in. And the missing-variable output is your friend: when a generated prompt looks incomplete, that CSV tells you exactly which slot was empty instead of making you eyeball the string. One more: it replaces all occurrences of a placeholder, so reusing {var1} twice in one template works fine.