将mongodb返回对象转换为字典 [英] Convert mongodb return object to dictionary

问题描述

我正在将bottle框架与mongoengine一起使用. 我有一个订单模型:

I'm using the bottle framework together with mongoengine. I have an orders model :

class OrderDetail(Option):
    orderDetailsQty = FloatField()

    def to_dict(self):
        return mongo_to_dict_helper(self)


class Order(Document):
    userName = StringField(required=True)
    orderDate = DateTimeField()
    orderStatus = ListField(EmbeddedDocumentField(Status))
    orderDetails = ListField(EmbeddedDocumentField(OrderDetail))
    orderComments = ListField(EmbeddedDocumentField(Comment))
    isActive = BooleanField()

    def to_dict(self):
        orderObj = mongo_to_dict_helper(self)
        orderDetailList = []
        for orderDetail in orderObj["orderDetails"]:
            orderDetailList.append(orderDetail.__dict__)
        orderObj["OrderDetails"] = orderDetailList
        return (self)

查询mongodb时，我得到一个对象，然后使用以下函数将其转换为字典:

When mongodb is queried I get an object which is then converted in to a dict by using the following function :

def mongo_to_dict_helper(obj):
    return_data = []
    for field_name in obj._fields:
        if field_name in ("id",):
            continue
        data = obj._data[field_name]

        if isinstance(obj._fields[field_name], StringField):
            return_data.append((field_name, str(data)))
        elif isinstance(obj._fields[field_name], FloatField):
            return_data.append((field_name, float(data)))
        elif isinstance(obj._fields[field_name], IntField):
            return_data.append((field_name, int(data)))
        elif isinstance(obj._fields[field_name], ListField):
            return_data.append((field_name, int(data)))
        else:
            # You can define your logic for returning elements
            pass
    return dict(return_data)

经过长时间的互联网搜索，我发现了此功能.后来发现，在将成员定义为ListField(EmbeddedDocumentField(obj))时，此函数也将失败.

I found this function after a long search in the internet. Later found out that this function also fails while defining a member as the ListField(EmbeddedDocumentField(obj)).

我还尝试编写一个条件来捕获EmbeddedDocumentField的特定情况:

I also tried writing a condition for catching the specific case of EmbeddedDocumentField :

elif isinstance(obj._fields[field_name], EmbeddedDocumentField):
    return_data.append(mongo_to_dict_helper(data))

但这也没有任何好处.

任何人都有解决此问题的方法吗?

Anyone have a workaround for this issue ?

推荐答案

仅使用对象的to_mongo方法将其转换为字典该怎么办?

What about just using to_mongo method of an object to convert it to a dict?

object.to_mongo()

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