The plugin proxy `:on-error` handler funneled every throwable through
`handle-error`, which only produced a message for malli ExceptionInfo
carrying `::sm/explain`. Two paths lost the real cause and rendered the
unhelpful "[PENPOT PLUGIN] Value not valid. Code: :error":
- A plain JS error (TypeError, etc.) is not an ExceptionInfo, so
`(ex-data cause)` is nil and the message bound to nil; the real
`.-message` only reached the host-page console, invisible to the
plugin sandbox.
- A malli explain whose errors flatten to nothing made `error-messages`
return "", which rendered as "Value not valid: . Code: :error".
`error-messages` now returns nil (not "") when there is nothing to
render, and `handle-error` falls back to the raw explain, then to the
throwable's `ex-message`/`str`, so a useful message always surfaces.
Working cases (well-formed explain) are unchanged.
Adds regression tests for the plain-JS-error path, the empty-explain
path, and the `error-messages` nil contract.
Fixes#9692
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Signed-off-by: Filip Sajdak <filip.sajdak@siili.com>
When a plugin call fails malli validation, the frontend renders one
"plugins.validation.message" line per error via
`app.plugins.utils/error-messages`, which reduces the explain via
`csm/interpret-schema-problem` and then destructures each entry as
`[field {:keys [message]}]` for translation.
That works only when the underlying malli error path has a single
element. `interpret-schema-problem` calls `(assoc-in acc field ...)`
where `field` can be a multi-element vector (e.g. `[:sets 0 :name]`).
For single-element paths the resulting map is flat
(`{:group {:message "..."}}`); for multi-element paths it is nested
(`{:sets {0 {:name {:message "..."}}}}`). The destructure assumes the
flat shape, so for a nested error the consumer reads:
field -> :sets
message -> nil (the nested entry has no :message at the top level)
and the produced i18n line resolves to `Field sets is invalid: ` --
or, when several errors are merged together at the same outer key,
to the user-facing `Field message is invalid` that the bug report
calls out, because `:message` then becomes the field name of the
deepest nested entry.
The original consumer carried a `#_(mapcat (comp seq val))` FIXME
that hinted at the missing flattening but did not implement one,
because the data shape produced by `interpret-schema-problem` is
not uniform.
Fix
---
Add a private `flatten-error-map` helper inside `app.plugins.utils`
that walks the error map produced by `interpret-schema-problem` and
yields `[path message]` pairs where `path` is the dot-joined field
path. Keywords use `(name k)`, strings pass through, anything else
(such as numeric indices from vector positions in the malli path)
is coerced via `str`. The recursion descends until it hits a leaf
that carries `:message`, which matches what
`interpret-schema-problem` produces in every branch.
The producer side (`csm/interpret-schema-problem` in
`common/src/app/common/schema/messages.cljc`) is left alone: it
already has another consumer (`collect-schema-errors` + the
form-validators pipeline) that depends on the keyed-by-field-path
shape, so normalising it at the source would require auditing every
validator. Flattening at the plugin consumer is the narrowest fix.
The FIXME comment is removed because the new helper supersedes it.
Tests
-----
`frontend-tests.plugins.utils-test` (new file, registered in
`runner.cljs`) covers:
- flat single-segment paths (`{:group {:message "..."}}`)
- nested multi-segment paths
(`{:sets {0 {:name {:message "..."}}}}`) -- the case from #9417
- mixed single- and multi-segment paths at the same explain
- mixed key types (keyword / string / numeric index)
- empty explain (no validation errors)
Closes#9417
Signed-off-by: bitcompass <devwiz.sh@gmail.com>
Co-authored-by: Andrey Antukh <niwi@niwi.nz>
