AlexanderKaraberov opened a new pull request #1165: Fix: validate_doc_update behaviour for Erlang functions URL: https://github.com/apache/couchdb/pull/1165 ## Overview When you implement `validate_doc_update` as an Erlang function it doesn't work because of a missing case clause, namely: when `couch_query_servers:try_compile()` calls `proc_prompt_raw()` which in turn calls `erlang:apply(Fun)` for a native function the return value of it is an atom `ok` or `true` but in case of JS function we have response code `1`. I added an additional guard check for all these situations in the `validate_doc_update` and now it works for Erlang functions as well. This was crucial in our case because JS functions are much slower and in our production system we are going to use validation functions implemented in Erlang. ## Testing recommendations Implement `validate_doc_update` as Erlang function in the design doc (`"language": "erlang"`), run CouchDB with `--enable-erlang-views` and update some docs in the db in order to trigger this call. ## Checklist - [ ] Code is written and works correctly; - [ ] Changes are covered by tests; - [ ] Documentation reflects the changes;
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