mongoengine distinct
:returns number of deleted documents. distinct (field)¶. Return a list of distinct values for a given field. Parameters: field – the field to select distinct values from ... , When trying to use distinct() I kept getting an empty BaseList, and then I realized that we are supposed to use the name of the field in db, ...
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mongoengine distinct 相關參考資料
2.5. Querying the database — MongoEngine 0.16.3 documentation
As of MongoEngine 0.8 the querysets utilise a local cache. So iterating it multiple times will only cause a single query. If this is not the desired behaviour you can ... http://docs.mongoengine.org 3. API Reference — MongoEngine 0.16.3 documentation
:returns number of deleted documents. distinct (field)¶. Return a list of distinct values for a given field. Parameters: field – the field to select distinct values from ... http://docs.mongoengine.org distinct() doesn't resolve db_field correctly · Issue #260 · MongoEngine ...
When trying to use distinct() I kept getting an empty BaseList, and then I realized that we are supposed to use the name of the field in db, ... https://github.com Group By in mongoengine EmbeddedDocumentListField - Stack Overflow
You can use .distinct() to get all the unique values of items instead of doing groupby . Return a list of distinct values for a given field. You need ... https://stackoverflow.com How to query for distinct results in mongodb with python? - Stack ...
First of all, it's only possible to get distinct values on some field (only one field) as explained in MongoDB documentation on Distinct. Mongoengine's QuerySet ... https://stackoverflow.com Index — MongoEngine 0.16.3 documentation
(mongoengine.Document method) · (mongoengine.queryset.QuerySet method) · DictField (class in mongoengine.fields) · distinct() (mongoengine.queryset. http://docs.mongoengine.org MongoDB, MongoEngine: unique list items - Stack Overflow
The best way to deal with this is to use MongoDB's native features. There are two operators that you could use: 1) Using $nin query out any votes that I have ... https://stackoverflow.com MongoEngine distinct() filtering and EmbeddedDocument - Stack Overflow
Recently, maybe after a software upgrade, I've encountered a problem: distinct() filtering now returns a dictionary collection rather then a ... https://stackoverflow.com MongoEngine query unique attributes - Stack Overflow
You want MongoDB (and thus pymongo's) cursor.distinct() method. Sample code would look like: from pymongo import MongoClient query ... https://stackoverflow.com Queryset distinct filter not working · Issue #295 · MongoEngine ...
DateTimeField(required=True) value = db.FloatField(required=True) And using distinct on field value will lead to unexpected result: In [11]: ... https://github.com |