Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
347 views
in Technique[技术] by (71.8m points)

python - Converting a django ValuesQuerySet to a json object

I'm trying to use the ValuesQuerySet feature in Django to limit the number of fields returned from query to only those I need. I would like to serialize this data set a JSON object However, Django keeps throwing an error. Below I've included my code and the error I receive:

objectList = ConventionCard.objects.values('fileName','id').filter(ownerUser = user)
data = serializers.serialize('json', objectList)
return HttpResponse(data, mimetype='application/javascript')

The Error:

Exception Type:     AttributeError
Exception Value:    'dict' object has no attribute '_meta'
Exception Location:     C:Python27libsite-packagesdjangocoreserializersase.py in serialize, line 41

Thanks !

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Cast the ValuesQuerySet to a list first:

query_set = ConventionCard.objects.values('fileName','id').filter(ownerUser = user)

list(query_set)

Removing the values call as suggested by ars causes the manager to pull all columns from the table, instead of only the two you need.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...