问题描述
尝试使用$ inc时,出现语法错误,指出$ set错误.我的查询如下:
When trying to use $inc I get a Syntax error stating that $set is wrong. My query is as follow:
mongo_db.campaign.update({'_id': str(campaign_id)}, { $inc: { 'item': 1 } }):
我查看了mongo文档( http://docs.mongodb. org/manual/reference/operator/inc/)和其他有关SO的示例,但我找不到问题所在.有什么建议吗?
I've looked at the mongo documentation (http://docs.mongodb.org/manual/reference/operator/inc/) and other examples on SO but I can't find what's wrong. Any suggestions?
谢谢!
推荐答案
$inc
不是有效的Python标识符.您应该像其他所有内容一样将其作为字符串传递:
$inc
isn't a valid Python identifier. You should pass it as a string, like everything else:
mongo_db.campaign.update({'_id': str(campaign_id)}, {'$inc': {'item': 1}})
您链接的MongoDB文档是一般的MongoDB文档,而不是特定于PyMongo的文档;您不能按原样复制/粘贴它们并期望它们能正常工作.
The MongoDB docs you linked are the general MongoDB documentation, not PyMongo-specific; you can't copy/paste them literally and expect things to work.
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