filter_bad_input

Summary

filter `{name}` expected a {expected} input, got `{input}`

Details

When this fires

A filter got the wrong type of input or argument. Examples: truncate(-1) or truncate("eighty") (needs a non-negative integer), round on a string, len on something that isn't a string, list, or map. Raised at render time, surfaced when sending an alert.

What to check

If the input is sometimes empty, chain default first: {{ x | default(0) | round(2) }}. Otherwise fix the upstream value or pick a different filter.

broken: {{ "hi" | round(2) }}
broken: {{ msg | truncate("eighty") }}
fixed:  {{ trigger.value | round(2) }}
fixed:  {{ msg | truncate(80) }}