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Date: Tue, 18 Mar 2014 10:30:44 +0000 (UTC)
From: "richard delorenzi (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
Message-ID: <JIRA.12702115.1395138627242.95735.1395138644585@arcas>
In-Reply-To: <JIRA.12702115.1395138627242@arcas>
References: <JIRA.12702115.1395138627242@arcas>
Subject: [jira] [Created] (COUCHDB-2204) rewrite of lists fail when not for
 key
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richard delorenzi created COUCHDB-2204:
------------------------------------------

             Summary: rewrite of lists fail when not for key
                 Key: COUCHDB-2204
                 URL: https://issues.apache.org/jira/browse/COUCHDB-2204
             Project: CouchDB
          Issue Type: Bug
      Security Level: public (Regular issues)
          Components: HTTP Interface
            Reporter: richard delorenzi


I have the following fragment in rewrite.json, 

{{quote}}
{ 
	"from": "server_lib/:~name",
	"to": "_list/sub/design",
	"query": {
	    "path": ["lib", ":~name" ],
	    "include_docs": "true"
	}
},
{{quote}}

when I try to fetch the page with
{{quote}}
curl  -s -D /dev/stderr -H "Accept: application/json" 'http://localhost:5984/q-couch-test/_design/couch-experiment/_rewrite/server_lib/myLib'
{{quote}}

I get this error
{{quote}}
log error:
[Tue, 18 Mar 2014 09:54:31 GMT] [info] [<0.5037.0>] Stacktrace: [{erlang,iolist_to_binary,
                                     [[<<"myLib">>,{[]}]],
                                     []},
                                 {couch_httpd_rewrite,
                                     '-maybe_encode_bindings/1-fun-0-',2,
                                     [{file,"couch_httpd_rewrite.erl"},
                                      {line,453}]},
                                 {lists,foldl,3,
                                     [{file,"lists.erl"},{line,1197}]},
                                 {couch_httpd_rewrite,handle_rewrite_req,3,
                                     [{file,"couch_httpd_rewrite.erl"},
                                      {line,147}]},
                                 {couch_httpd_db,do_db_req,2,
                                     [{file,"couch_httpd_db.erl"},{line,230}]},
                                 {couch_httpd,handle_request_int,5,
                                     [{file,"couch_httpd.erl"},{line,317}]},
                                 {mochiweb_http,headers,5,
                                     [{file,"mochiweb_http.erl"},{line,136}]},
                                 {proc_lib,init_p_do_apply,3,
                                     [{file,"proc_lib.erl"},{line,227}]}]
{{quote}}

The bug seems to be in couch_httpd_rewrite.erl in maybe_json. It treats keys specially, so we can represent keys as lists but not other query strings.

e.g. this rewrite fragment works
{{quote}}
 { 
	"from": "view/by_name/:~type",
	"to":  "_view/all-by-name",
	"query": { 
	    "startkey": [ ":~type", null ],
	    "endkey":   [ ":~type", {} ]
	} 
}, 
{{quote}} 


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