Class StructuredQuery (2.19.0) 

StructuredQuery(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A Firestore query.

The query stages are executed in the following order:

  1. from
  2. where
  3. select
  4. order_by + start_at + end_at
  5. offset
  6. limit

Attributes
Name Description
select google.cloud.firestore_v1.types.StructuredQuery.Projection
Optional sub-set of the fields to return. This acts as a DocumentMask][google.firestore.v1.DocumentMask] over the documents returned from a query. When not set, assumes that the caller wants all fields returned.
from_ MutableSequence[google.cloud.firestore_v1.types.StructuredQuery.CollectionSelector]
The collections to query.
where google.cloud.firestore_v1.types.StructuredQuery.Filter
The filter to apply.
order_by MutableSequence[google.cloud.firestore_v1.types.StructuredQuery.Order]
The order to apply to the query results. Firestore allows callers to provide a full ordering, a partial ordering, or no ordering at all. In all cases, Firestore guarantees a stable ordering through the following rules: - The order_by is required to reference all fields used with an inequality filter. - All fields that are required to be in the order_by but are not already present are appended in lexicographical ordering of the field name. - If an order on __name__ is not specified, it is appended by default. Fields are appended with the same sort direction as the last order specified, or 'ASCENDING' if no order was specified. For example: - ORDER BY a becomes ORDER BY a ASC, __name__ ASC - ORDER BY a DESC becomes ORDER BY a DESC, __name__ DESC - WHERE a > 1 becomes WHERE a > 1 ORDER BY a ASC, __name__ ASC - WHERE __name__ > ... AND a > 1 becomes WHERE __name__ > ... AND a > 1 ORDER BY a ASC, __name__ ASC
start_at google.cloud.firestore_v1.types.Cursor
A potential prefix of a position in the result set to start the query at. The ordering of the result set is based on the ORDER BY clause of the original query. :: SELECT * FROM k WHERE a = 1 AND b > 2 ORDER BY b ASC, __name__ ASC; This query's results are ordered by (b ASC, __name__ ASC). Cursors can reference either the full ordering or a prefix of the location, though it cannot reference more fields than what are in the provided ORDER BY. Continuing off the example above, attaching the following start cursors will have varying impact: - START BEFORE (2, /k/123): start the query right before a = 1 AND b > 2 AND __name__ > /k/123. - START AFTER (10): start the query right after a = 1 AND b > 10. Unlike OFFSET which requires scanning over the first N results to skip, a start cursor allows the query to begin at a logical position. This position is not required to match an actual result, it will scan forward from this position to find the next document. Requires: - The number of values cannot be greater than the number of fields specified in the ORDER BY clause.
end_at google.cloud.firestore_v1.types.Cursor
A potential prefix of a position in the result set to end the query at. This is similar to START_AT but with it controlling the end position rather than the start position. Requires: - The number of values cannot be greater than the number of fields specified in the ORDER BY clause.
offset int
The number of documents to skip before returning the first result. This applies after the constraints specified by the WHERE, START AT, & END AT but before the LIMIT clause. Requires: - The value must be greater than or equal to zero if specified.
limit google.protobuf.wrappers_pb2.Int32Value
The maximum number of results to return. Applies after all other constraints. Requires: - The value must be greater than or equal to zero if specified.
find_nearest google.cloud.firestore_v1.types.StructuredQuery.FindNearest
Optional. A potential nearest neighbors search. Applies after all other filters and ordering. Finds the closest vector embeddings to the given query vector.

Classes

CollectionSelector

CollectionSelector(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A selection of a collection, such as messages as m1.

CompositeFilter

CompositeFilter(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A filter that merges multiple other filters using the given operator.

Direction

Direction(value)

A sort direction.

FieldFilter

FieldFilter(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A filter on a specific field.

FieldReference

FieldReference(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A reference to a field in a document, ex: stats.operations.

Filter

Filter(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A filter.

This message has oneof_ fields (mutually exclusive fields). For each oneof, at most one member field can be set at the same time. Setting any member of the oneof automatically clears all other members.

.. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields

FindNearest

FindNearest(mapping=None, *, ignore_unknown_fields=False, **kwargs)

Nearest Neighbors search config. The ordering provided by FindNearest supersedes the order_by stage. If multiple documents have the same vector distance, the returned document order is not guaranteed to be stable between queries.

Order

Order(mapping=None, *, ignore_unknown_fields=False, **kwargs)

An order on a field.

Projection

Projection(mapping=None, *, ignore_unknown_fields=False, **kwargs)

The projection of document's fields to return.

UnaryFilter

UnaryFilter(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A filter with a single operand.

.. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields