Reference documentation and code samples for the Cloud Firestore V1 API class Google::Cloud::Firestore::V1::StructuredQuery.
A Firestore query.
Inherits
- Object
Extended By
- Google::Protobuf::MessageExts::ClassMethods
Includes
- Google::Protobuf::MessageExts
Methods
#end_at
def end_at() -> ::Google::Cloud::Firestore::V1::Cursor
-
(::Google::Cloud::Firestore::V1::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.
- The number of values cannot be greater than the number of fields
specified in the
#end_at=
def end_at=(value) -> ::Google::Cloud::Firestore::V1::Cursor
-
value (::Google::Cloud::Firestore::V1::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.
- The number of values cannot be greater than the number of fields
specified in the
-
(::Google::Cloud::Firestore::V1::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.
- The number of values cannot be greater than the number of fields
specified in the
#from
def from() -> ::Array<::Google::Cloud::Firestore::V1::StructuredQuery::CollectionSelector>
- (::Array<::Google::Cloud::Firestore::V1::StructuredQuery::CollectionSelector>) — The collections to query.
#from=
def from=(value) -> ::Array<::Google::Cloud::Firestore::V1::StructuredQuery::CollectionSelector>
- value (::Array<::Google::Cloud::Firestore::V1::StructuredQuery::CollectionSelector>) — The collections to query.
- (::Array<::Google::Cloud::Firestore::V1::StructuredQuery::CollectionSelector>) — The collections to query.
#limit
def limit() -> ::Google::Protobuf::Int32Value
-
(::Google::Protobuf::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.
#limit=
def limit=(value) -> ::Google::Protobuf::Int32Value
-
value (::Google::Protobuf::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.
-
(::Google::Protobuf::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.
#offset
def offset() -> ::Integer
-
(::Integer) —
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 theLIMIT
clause.Requires:
- The value must be greater than or equal to zero if specified.
#offset=
def offset=(value) -> ::Integer
-
value (::Integer) —
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 theLIMIT
clause.Requires:
- The value must be greater than or equal to zero if specified.
-
(::Integer) —
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 theLIMIT
clause.Requires:
- The value must be greater than or equal to zero if specified.
#order_by
def order_by() -> ::Array<::Google::Cloud::Firestore::V1::StructuredQuery::Order>
-
(::Array<::Google::Cloud::Firestore::V1::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
becomesORDER BY a ASC, __name__ ASC
ORDER BY a DESC
becomesORDER BY a DESC, __name__ DESC
WHERE a > 1
becomesWHERE a > 1 ORDER BY a ASC, __name__ ASC
WHERE __name__ > ... AND a > 1
becomesWHERE __name__ > ... AND a > 1 ORDER BY a ASC, __name__ ASC
- The
#order_by=
def order_by=(value) -> ::Array<::Google::Cloud::Firestore::V1::StructuredQuery::Order>
-
value (::Array<::Google::Cloud::Firestore::V1::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
becomesORDER BY a ASC, __name__ ASC
ORDER BY a DESC
becomesORDER BY a DESC, __name__ DESC
WHERE a > 1
becomesWHERE a > 1 ORDER BY a ASC, __name__ ASC
WHERE __name__ > ... AND a > 1
becomesWHERE __name__ > ... AND a > 1 ORDER BY a ASC, __name__ ASC
- The
-
(::Array<::Google::Cloud::Firestore::V1::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
becomesORDER BY a ASC, __name__ ASC
ORDER BY a DESC
becomesORDER BY a DESC, __name__ DESC
WHERE a > 1
becomesWHERE a > 1 ORDER BY a ASC, __name__ ASC
WHERE __name__ > ... AND a > 1
becomesWHERE __name__ > ... AND a > 1 ORDER BY a ASC, __name__ ASC
- The
#select
def select() -> ::Google::Cloud::Firestore::V1::StructuredQuery::Projection
- (::Google::Cloud::Firestore::V1::StructuredQuery::Projection) — The projection to return.
#select=
def select=(value) -> ::Google::Cloud::Firestore::V1::StructuredQuery::Projection
- value (::Google::Cloud::Firestore::V1::StructuredQuery::Projection) — The projection to return.
- (::Google::Cloud::Firestore::V1::StructuredQuery::Projection) — The projection to return.
#start_at
def start_at() -> ::Google::Cloud::Firestore::V1::Cursor
-
(::Google::Cloud::Firestore::V1::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 beforea = 1 AND b > 2 AND __name__ > /k/123
.START AFTER (10)
: start the query right aftera = 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.
#start_at=
def start_at=(value) -> ::Google::Cloud::Firestore::V1::Cursor
-
value (::Google::Cloud::Firestore::V1::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 beforea = 1 AND b > 2 AND __name__ > /k/123
.START AFTER (10)
: start the query right aftera = 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.
-
(::Google::Cloud::Firestore::V1::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 beforea = 1 AND b > 2 AND __name__ > /k/123
.START AFTER (10)
: start the query right aftera = 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.
#where
def where() -> ::Google::Cloud::Firestore::V1::StructuredQuery::Filter
- (::Google::Cloud::Firestore::V1::StructuredQuery::Filter) — The filter to apply.
#where=
def where=(value) -> ::Google::Cloud::Firestore::V1::StructuredQuery::Filter
- value (::Google::Cloud::Firestore::V1::StructuredQuery::Filter) — The filter to apply.
- (::Google::Cloud::Firestore::V1::StructuredQuery::Filter) — The filter to apply.