find() and findOne() in mongoengine

mongodb mongoengine
Uuid picture Uuid · Dec 7, 2012 · Viewed 18.2k times · Source

How can I do a quick find() or findOne() with mongoengine, I already have this but it does not seems to be the right way:

Cars.objects()._collection.find_one({'model':2013})

Answer

Sushant Gupta picture Sushant Gupta · Dec 7, 2012

For find() you can do:

Cars.objects(model=2013)

And for find_one() you can do:

Cars.objects.get(model=2013)

To retrieve a result that should be unique in the collection, use get(). This will raise DoesNotExist if no document matches the query, and MultipleObjectsReturned if more than one document matched the query.

Else if multiple records exists, simply limit, like:

Cars.objects(model=2013)[0]

Related questions

Convert mongodb return object to dictionary

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(…

Read More
Sort using MongoEngine?

How do I sort the query objects in MongoEngine, like I would in a regular mongodb query? http://www.mongodb.org/display/DOCS/Sorting+and+Natural+Order

Read More
How to delete document from MongoDB using Mongoengine?

How to delete document from MongoDB using Mongoengine? I'veread the API reference here: http://docs.mongoengine.org/apireference.html but I can not understand what is: delete(**write_concern) Do you have any idea?

Read More