如何在mongoengine中使用python在字典中包含的嵌套字典或数组上执行此类过滤器查询? [英] How to perform such filter queries in mongoengine on nested dicts or arrays contained in dict with python?

问题描述

说我有以下字典对象:

{
    "a": "value of a",
    "somedict": {
        "someinfo": [
            {
                "name": "Jordan",
                "food": [
                    "fries",
                    "coke",
                    "drink"
                ]
            }
        ]
    }
}

如果我想使用mongoengine在python中应用查询过滤器，该怎么办?我在文档中看到您可以执行以下操作:

If I wanted to apply a query filter in python using mongoengine, how would I do it? I see in the documentation you can do things like:

sample_objs_filter = Sample.objects(a='value of a')

但是我该如何过滤说

1) "name='Jordan'" 
2)'food' contains 'fries'?

如果mongoengine无法做到，那么还有其他更好的Mongo库吗?

If mongoengine cant do it, is there some other mongo library thats better at accomplishing this?

推荐答案

我建议阅读更多有关mongodb的

I'd suggest reading more about mongodb's dot notation about how you can query / look into objects and return matching documents.

因为您不能使用点作为关键字参数，所以 mongoengine 遵循django orm风格的double下划线:

As you can't use a dot as a keyword argument mongoengine follows the django orm style of double underscores:

1) Sample.objects(somedict__someinfo__name='Jordan')
2) Sample.objects(somedict__someinfo__food='Fries')

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