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https://issues.apache.org/jira/browse/COUCHDB-1318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13139319#comment-13139319
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Jason Smith commented on COUCHDB-1318:
--------------------------------------
You request _design/ddoc/_view/foo
That means you want map function output. But No such map function was defined.
Bob Newson suggested 404, since there is no views.foo.map object.
function_clause is an Erlang error, not very informative to Couch users. For
the response body, maybe something like this:
{"error":"not_found", "reason":"View definition must be an object with 'map'
and 'reduce' values"}
> 500 function_clause error when requesting bad views
> ---------------------------------------------------
>
> Key: COUCHDB-1318
> URL: https://issues.apache.org/jira/browse/COUCHDB-1318
> Project: CouchDB
> Issue Type: Bug
> Components: Database Core
> Affects Versions: 1.1
> Environment: OS X, Linux
> Reporter: Jason Smith
> Priority: Minor
>
> Run the replicator test suite. The design document
> /test_suite_rep_doc_db_a/_design/foobar is well-named. Its views definition
> is not a {"map":..., "reduce":...} object but rather a string (of what would
> be a map function).
> Design documents of this form return HTTP 500 with function_clause errors
> when querying both (1) _view/the_bad_view and also (2) _info.
> Stack trace:
> [debug] [<0.20047.0>] 'GET' /asdf/_design/x/_view/jason {1,1} from "127.0.0.1"
> Headers: [{'Accept',"*/*"},
> {'Host',"localhost:5984"},
> {'User-Agent',"curl/7.19.7 (x86_64-pc-linux-gnu) libcurl/7.19.7
> OpenSSL/0.9.8k zlib/1.2.3.3 libidn/1.15"}]
> [debug] [<0.20047.0>] OAuth Params: []
> [error] [<0.20047.0>] function_clause error in HTTP request
> [info] [<0.20047.0>] Stacktrace: [{couch_view_group,
> '-design_doc_to_view_group/1-fun-0-',
> [{<<"jason">>,
> <<"function(doc) { emit(doc._id, 1)
> }">>},
> {dict,0,16,16,8,80,48,
> {[],[],[],[],[],[],[],[],[],[],[],[],[],
> [],[],[]},
> {{[],[],[],[],[],[],[],[],[],[],[],[],[],
> [],[],[]}}}]},
> {lists,foldl,3},
> {couch_view_group,design_doc_to_view_group,
> 1},
> {couch_view_group,open_db_group,2},
> {couch_view,get_group_server,2},
> {couch_view,get_group,3},
> {couch_view,get_map_view,4},
> {couch_httpd_view,design_doc_view,5}]
> [info] [<0.20047.0>] 127.0.0.1 - - 'GET' /asdf/_design/x/_view/jason 500
> [debug] [<0.20047.0>] httpd 500 error response:
> {"error":"unknown_error","reason":"function_clause"}
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