AIHub Expose Float

AIHub Expose Float is the general-purpose decimal input of this pack's expose family. The client's UI shows it as a number field or slider, the user drags it, and the value flows into your workflow as a FLOAT output. Where it gets interesting is the boundaries: the min and max can be linked to other exposed floats, so one field's range can depend on another value in the same run. That's a level of input hygiene you don't get from a plain widget - it's the difference between "enter any number" and "this can't exceed the max you just picked."

It's part of otavanopisto's ComfyUI-aihub-workflow-exposer, the pack that lets external apps drive ComfyUI as their generation engine. Expose nodes are the inputs: the client sends values over the pack's own websocket (port 8111), and the node validates and passes them into the graph.

How it works

The client sends the float; the node checks it's within the min/max (and raises a ValueError naming the field if it isn't) and returns it. The dynamic range is the neat part: min_expose_id and max_expose_id let you name another exposed float's id to borrow its value as this field's boundary, with optional offsets. So a "width" field could be constrained by an exposed "canvas width" minus a margin, and if the canvas width changes, the constraint follows.

The inputs that matter

• id / label / tooltip - the usual expose metadata; id is the contract with the client and with condition expressions.
• min / max / step - the static range and increment (defaults 0..1, step 0.05). Set step to something human, like 0.05 or 0.1, or you'll drive users mad with 0.0499999 values.
• value - the default (default 0.5). The node errors if the default sits outside min/max, so when you change a bound, check the value still fits.
• min_expose_id / max_expose_id - the ids of other exposed floats to use as dynamic bounds. Leave empty for static bounds.
• min_expose_offset / max_expose_offset - added to the dynamic bound (e.g. max = other_float + 1).
• slider - if true, the client renders it as a slider rather than a numeric field.
• advanced / index - UI placement.

The output

• FLOAT - the validated value, wire it anywhere a float is expected.

Installing it

ComfyUI Manager (search "ComfyUI-aihub-workflow-exposer"), or:

cd ComfyUI/custom_nodes
git clone https://github.com/otavanopisto/ComfyUI-aihub-workflow-exposer
# restart ComfyUI

No requirements, no downloads.

Where people get burned

The dynamic bound fields are the trap: they reference expose ids, and if the id you type doesn't exist (or belongs to a field the client doesn't expose), the bound silently doesn't apply. Spell them exactly, and mind the offsets - a min_expose_offset applies to a min, a max_expose_offset to a max, and mixing them up produces ranges that look right and behave wrong. And as with all expose nodes, the stock UI shows you a plain widget with a default; the real, wired-up input happens when a client is connected.