将django ValuesQuerySet转换为json对象 [英] Converting a django ValuesQuerySet to a json object

问题描述

我尝试使用Django中的ValuesQuerySet功能将从查询返回的字段数限制为仅需要的字段数。我想序列化这个数据集一个JSON对象然而，Django不断抛出一个错误。下面我已经包括我的代码和我收到的错误：

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')

错误：

Exception Type:     AttributeError
Exception Value:    'dict' object has no attribute '_meta'
Exception Location:     C:\Python27\lib\site-packages\django\core\serializers\base.py in serialize, line 41

谢谢！

推荐答案

尝试通过使用QuerySet的 serialize 方法将值列表中的字段放在值列表中：

Try subsetting the fields in your values list through the serialize method using a QuerySet instead:

from django.core import serializers
objectQuerySet = ConventionCard.objects.filter(ownerUser = user)
data = serializers.serialize('json', objectQuerySet, fields=('fileName','id'))

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