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From "James Cash (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COUCHDB-635) A document with a field named 'constructor' causes it to silently be excluded from any and all map views
Date Sun, 31 Jan 2010 00:43:34 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12806762#action_12806762
] 

James Cash commented on COUCHDB-635:
------------------------------------

Sure,I try to run the following map:

function(doc) {
  if (doc._id == 'CSC190H1S') {
    emit([doc._id], doc.activities.L02.outcomes);
  }
}

where the doc in question resembles:

{   "_id": "CSC190H1S",
   "_rev": "34-b3a5079ea3f7818534426991a8d11907",
   "activities": {
       "L02": {
           "outcomes": {
               "constructor": [
                   "knowledge"
               ] } } }

The log contains the following entry:

[Sun, 31 Jan 2010 00:37:48 GMT] [info] [<0.19833.3>] OS Process :: function raised exception
(TypeError: toJSON.dispatcher[val.constructor.name] is not a function) with doc._id CSC190H1S


> A document with a field named 'constructor' causes it to silently be excluded from any
and all map views
> --------------------------------------------------------------------------------------------------------
>
>                 Key: COUCHDB-635
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-635
>             Project: CouchDB
>          Issue Type: Bug
>          Components: JavaScript View Server
>    Affects Versions: 0.10.1
>         Environment: Mac OS X 10.6.2, CouchDB 0.10.1
>            Reporter: James Cash
>            Priority: Minor
>
> If a document has a (nested) field named 'constructor', any map which attempts to emit
the document will instead silently discard it.
> For example, the document
> {   "_id": "CSC190H1S",
>    "_rev": "32-287eec55e59305ee94129a0be940bf41",
>     "outcomes": {
>                "constructor": [
>                    "knowledge"
>                ]
>     }
> }
> will silently be excluded by any view which attempts to emit "doc" or "doc.outcomes"
.

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