[BUG] Background callbacks - Error with Pattern Matching in Running option

[slyin87]

Describe your context
I use background callback with Celery + Redis. In the example there is a running option to put in the components. The thing is I am using pattern matching. If I remove the running option, there is no problem.

This is my app.py:

This is my callback:

dash                      2.9.0
dash-bootstrap-components 1.4.1
dash-core-components      2.0.0
dash-html-components      2.0.0
dash-mantine-components   0.12.0
dash-table                5.0.0

Describe the bug

the running option using background callback does not work. Moreover, Why do I see it is a long callback instead of background callback?
Error:

File "/usr/local/lib/python3.10/site-packages/dash/_callback.py", line 167, in callback
    validate_long_inputs(x[0] for x in long_spec["running"])
  File "/usr/local/lib/python3.10/site-packages/dash/_callback.py", line 209, in validate_long_inputs
    raise WildcardInLongCallback(
dash.exceptions.WildcardInLongCallback: long callbacks does not support dependencies with
pattern-matching ids
    Received: <Output `{"index":["MATCH"],"type":"main_apm_generate_boxplot_button"}.disabled`>

[Ciaran-YouSeq]

i'm having the same issue with DiskcacheManager in dash 2.9.2. I'm a bit confused by this error as the docs (https://dash.plotly.com/background-callbacks) say pattern matching is supported for background callbacks, but in the validate_long_inputs method in _callback.py there is no mechanism that allows pattern matching - it will always raise WildcardInLongCallback

[T4rk1n]

Pattern matching is supported for inputs and outputs but it was not implemented for progress, running and cancel.
#2111

[nickmelnikov82]

Hi, your situation is interesting and I found 3 similar errors that might be useful for you:

1. Possible bug with callbacks
2. Callback executes but return value has no effect
3. Pattern-matching callbacks with empty or partly-empty Output

[T4rk1n]

Duplicate of #2111