Queryset¶
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class
yadm.queryset.
BaseQuerySet
(db, document_class, *, cache=None, criteria=None, projection=None, sort=None, slice=None, read_preference=None)¶ Query builder.
Parameters: - db –
- document_class –
- cache –
- criteria (dict) –
- projection (dict) –
- sort (list) –
- slice (slice) –
- read_preference (int) –
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cache
¶ Queryset cache object.
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copy
(*, cache=None, criteria=None, projection=None, sort=None, slice=None, read_preference=None)¶ Copy queryset with new parameters.
Only keywords arguments is alowed. Parameters simply replaced with given arguments.
Parameters: - cache –
- criteria (dict) –
- projection (dict) –
- sort (list) –
- slice (slice) –
- read_preference (int) –
Returns: new
yadm.queryset.QuerySet
object
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fields
(*fields)¶ Get only setted fields.
Update projection with fields.
Parameters: fields (str) – Returns: new yadm.queryset.QuerySet
qs('field', 'field2')
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fields_all
()¶ Clear projection.
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find
(criteria=None, projection=None)¶ Return queryset copy with new criteria and projection.
Parameters: - criteria (dict) – update queryset’s criteria
- projection (dict) – update queryset’s projection
Returns: new
yadm.queryset.QuerySet
qs({'field': {'$gt': 3}}, {'field': True})
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read_preference
(read_preference)¶ Setup readPreference.
Return new QuerySet instance.
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sort
(*sort)¶ Return queryset with sorting.
Parameters: sort (tuples) – tuples with two items: (‘field_name’, sort_order_as_int). qs.sort(('field_1', 1), ('field_2', -1))