Module query (2.7.2)

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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

CollectionGroup

CollectionGroup(
    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
NameDescription
parent CollectionReference

The collection that this query applies to.

Query

Query(
    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
NameDescription
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.

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.