Module base_query (2.18.0)

Version 2.18.0

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Classes for representing queries for the Google Cloud Firestore API.

A Query can be created directly from a Collection and that can be a more common way to create a query than direct usage of the constructor.

Classes

And

And(filters)

Class representation of an AND Filter.

BaseCollectionGroup

BaseCollectionGroup(
    parent,
    projection=None,
    field_filters=(),
    orders=(),
    limit=None,
    limit_to_last=False,
    offset=None,
    start_at=None,
    end_at=None,
    all_descendants=True,
    recursive=False,
)

Represents a Collection Group in the Firestore API.

This is a specialization of .Query that includes all documents in the database that are contained in a collection or subcollection of the given parent.

Parameter
Name	Description
parent	CollectionReference The collection that this query applies to.

BaseCompositeFilter

BaseCompositeFilter(operator=Operator.OPERATOR_UNSPECIFIED, filters=None)

Base class for a Composite Filter. (either OR or AND).

BaseFilter

BaseFilter()

Base class for Filters

BaseQuery

BaseQuery(
    parent,
    projection=None,
    field_filters=(),
    orders=(),
    limit=None,
    limit_to_last=False,
    offset=None,
    start_at=None,
    end_at=None,
    all_descendants=False,
    recursive=False,
)

Represents a query to the Firestore API.

Instances of this class are considered immutable: all methods that would modify an instance instead return a new instance.

Parameters
Name	Description
parent	CollectionReference The collection that this query applies to.
projection	Optional[Projection] A projection of document fields to limit the query results to.
field_filters	Optional[Tuple[FieldFilter, ...]] The filters to be applied in the query.
orders	Optional[Tuple[Order, ...]] The "order by" entries to use in the query.
limit	Optional[int] The maximum number of documents the query is allowed to return.
limit_to_last	Optional[bool] Denotes whether a provided limit is applied to the end of the result set.
offset	Optional[int] The number of results to skip.
start_at	Optional[Tuple[dict, bool]] Two-tuple of : * a mapping of fields. Any field that is present in this mapping must also be present in orders * an after flag The fields and the flag combine to form a cursor used as a starting point in a query result set. If the after flag is :data:True, the results will start just after any documents which have fields matching the cursor, otherwise any matching documents will be included in the result set. When the query is formed, the document values will be used in the order given by orders.
end_at	Optional[Tuple[dict, bool]] Two-tuple of: * a mapping of fields. Any field that is present in this mapping must also be present in orders * a before flag The fields and the flag combine to form a cursor used as an ending point in a query result set. If the before flag is :data:True, the results will end just before any documents which have fields matching the cursor, otherwise any matching documents will be included in the result set. When the query is formed, the document values will be used in the order given by orders.
all_descendants	Optional[bool] When false, selects only collections that are immediate children of the parent specified in the containing RunQueryRequest. When true, selects all descendant collections.
recursive	Optional[bool] When true, returns all documents and all documents in any subcollections below them. Defaults to false.

FieldFilter

FieldFilter(field_path, op_string, value=None)

Class representation of a Field Filter.

Or

Or(filters)

Class representation of an OR Filter.

QueryPartition

QueryPartition(query, start_at, end_at)

Represents a bounded partition of a collection group query.

Contains cursors that can be used in a query as a starting and/or end point for the collection group query. The cursors may only be used in a query that matches the constraints of the query that produced this partition.

Parameters
Name	Description
query	BaseQuery The original query that this is a partition of.
start_at	Optional[DocumentSnapshot] Cursor for first query result to include. If None, the partition starts at the beginning of the result set.
end_at	Optional[DocumentSnapshot] Cursor for first query result after the last result included in the partition. If None, the partition runs to the end of the result set.