Hi Robert.

Good to know! I created oreilly/couchdb-guide#pr549, "tour.html: remove false claim that engine "shuts off indexing" on view errors":
https://github.com/oreilly/couchdb-guide/pull/549

Additional comments/knowledge welcome there. Also, moving this thread to couchdb-dev, as it'd benefit from developer confirmation/refutation.

Thanks.

Ronan

On 01/13/2016 06:05 PM, Robert Samuel Newson wrote:
Hi,

Interesting find. I don’t believe this was ever true, the view engine
will continue to build in the face of exceptions being thrown for
every single document it encounters.

B.

On 13 Jan 2016, at 19:43, Ronan Jouchet
<[email protected]> wrote:

Hi.

The CouchDB Guide ( http://guide.couchdb.org/draft/tour.html )
mentions that:
when a map function fails regularly (due to a missing required
field or other JavaScript exception), CouchDB shuts off its
indexing to prevent any further resource usage

But neither the official doc, nor my Google-fu could provide
details:

1. Is this still true as of CouchDB 1.6.1 / 2.0alpha?

2. Which JS errors/exceptions cause a view to be "disabled",
exactly?

2.a. In particular, just accessing a non-existent key of a `doc`
object is not considered an error, right? It evaluates to
`undefined` faithfully to vanilla JS behavior, correct? Said
differently, `if (doc.species && doc.species === 'human')` is
equivalent to: `if (doc.species === 'human')` , right?

3. How can I "re-enable" a "disabled" view?

Thanks :)

-- Ronan

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