trouble when setting reduce=False in view

[Vincent]

Python reports a KeyError when I try to access some view results with reduce=False. I hope someone can help me identify the problem. Any assistance would be appreciated. Below are some details. Please let me know what other information would help. Thanks.  

Vincent

The view statement is:

view_result = DefaultPeak.view('default_peak/{0}'.format(view), reduce=False, limit=1)

view_result.first() produces the following Traceback:

Exception Location: /usr/local/lib/python2.7/dist-packages/couchdbkit/schema/util.py in wrap, line 29

Environment:

Request Method: GET

Request URL: http://IP:8000/

Django Version: 1.5.dev17942

Python Version: 2.7.3

Installed Applications:

('django.contrib.auth',

 'django.contrib.contenttypes',

 'django.contrib.sessions',

 'django.contrib.sites',

 'django.contrib.messages',

 'django.contrib.staticfiles',

 'couchdbkit.ext.django',

 'django.contrib.humanize',

 'polls',

 'testdata',

 'default_peak')

Installed Middleware:

('django.middleware.common.CommonMiddleware',

 'django.contrib.sessions.middleware.SessionMiddleware',

 'django.middleware.csrf.CsrfViewMiddleware',

 'django.contrib.auth.middleware.AuthenticationMiddleware',

 'django.contrib.messages.middleware.MessageMiddleware')

Traceback:

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response

  111.                         response = callback(request, *callback_args, **callback_kwargs) File "/home/vincent/Django/mysite/default_peak/views.py" in home

  165.         view_result.first() File "/usr/local/lib/python2.7/dist-packages/couchdbkit/client.py" in first

  930.             return list(self)[0] File "/usr/local/lib/python2.7/dist-packages/couchdbkit/client.py" in iterator

  920.             yield wrapper(row) File "/usr/local/lib/python2.7/dist-packages/couchdbkit/client.py" in row_wrapper

  901.                     return schema(data) File "/usr/local/lib/python2.7/dist-packages/couchdbkit/schema/util.py" in wrap

  29.         cls = classes[doc_type]

Exception Type: KeyError at /

Exception Value: None

Variable
Value
doctype_attr
'doc_type'
doc_type
None
classes
{'DefaultPeak': <class 'default_peak.models.DefaultPeak'>}

The exception occurs because doc_type is None and classes[None] does not exist.

The class DefaultPeak is defined with no static properties:

class DefaultPeak(Document):

    def __unicode__(self):

        return None

    class Meta:

        app_label = "default_peak"

Couchdb produces basically the same information with reduce=True and reduce=False&limit=1

reduce=True:

{"rows":[
{"key":null,"value":{"OS":"linux","StartTime":"2012-06-12 10:27:56.119293",...}}

]}

reduce=False&limit=1:

{"total_rows":74,"offset":0,"rows":[
{"id":"00a54b28-b454-11e1-87e9-00259055f3e6","key":"prf-lin-15","value":{"OS":"linux","StartTime":"2012-06-12 00:01:07.897811",...}}
]}

I have been able to use reduce=False successfully with other views such as:
view_result = DefaultPeak.view( 'default_peak/variance', reduce=False, startkey=[ serial, metric ], endkey=[ serial, metric, {}] )

[Vincent]

In further testing this exception occurs when my Couchdb map function emits a value that is a basic Javascript object/dictionary rather than a Javascript array. When the emit statement takes the form emit( key, {a:1,b:2,c:3} ) the exception occurs but it does not occur with an emit statement of the form emit( key, [1,2,3] ). 

I tried the wrap_doc=False option but this did not resolve the issue. The wrap_doc option appears to be passed along to Couchdb (where it has no meaning) and is not caught by Couchdbkit. The statement

view_result = DefaultPeak.view('default_peak/testview', wrap_doc=False, reduce=False) produces in the Couchdb log:

GET /perf_test/_design/default_peak/_view/testview?reduce=false&wrap_doc=false

I added a static property workAround = IntegerProperty(required=False) to my DefaultPeak(Document) so that it is no longer empty but the problem still occurs.

[Benoit Chesneau]

Do you have any errors on couchdb level? What is your couchdbkit version?

- benoit

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[Benoit Chesneau]

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Can you open a ticket on github? I will do some tests today.

- benoît

[Vincent]

I am using version 0.6.2 of Couchdbkit. Couchdb reports no errors. I will open a ticket shortly. Thanks.