Query extension type
A Query
refers to a Query which you can read or listen to. You can also
construct refined Query
objects by adding filters and ordering.
- on
- Implemented types
- Implementers
- Available extensions
Properties
Methods
-
aggregate(
JSObject aggregateSpec) → AggregateQuery - Returns a query that can perform the given aggregations.
-
count(
) → AggregateQuery - Returns a query that counts the documents in the result set of this query.
-
endAt(
DocumentSnapshot snapshot) → Query - Creates and returns a new Query that ends before the provided fields relative to the order of the query. The order of the field values must match the order of the order by clauses of the query.
-
endBefore(
DocumentSnapshot snapshot) → Query - Creates and returns a new Query that starts after the provided fields relative to the order of the query. The order of the field values must match the order of the order by clauses of the query.
-
explain(
ExplainOptions options) → JSPromise< ExplainResults< QuerySnapshot> > - Plans and optionally executes this query. Returns a Promise that will be resolved with the planner information, statistics from the query execution (if any), and the query results (if any).
-
findNearest(
JSAny vectorField, JSObject queryVector, JSObject options) → VectorQuery - Returns a query that can perform vector distance (similarity) search with given parameters.
-
get(
) → JSPromise< QuerySnapshot> - Creates and returns a new Query that ends at the provided fields relative to the order of the query. The order of the field values must match the order of the order by clauses of the query.
-
isEqual(
Query other) → bool -
Returns true if this
Query
is equal to the provided one. -
limit(
int limit) → Query - Creates and returns a new Query that only returns the first matching documents.
-
limitToLast(
int limit) → Query - Creates and returns a new Query that only returns the last matching documents.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
offset(
int offset) → Query - Specifies the offset of the returned results.
-
onSnapshot(
JSFunction onNext, [JSFunction onError]) → void - Executes the query and returns the results as Node Stream.
-
orderBy(
JSAny fieldPath, [String directionStr]) → Query - Creates and returns a new Query that's additionally sorted by the specified field, optionally in descending order instead of ascending.
-
startAfter(
DocumentSnapshot snapshot) → Query - Creates and returns a new Query that starts at the provided fields relative to the order of the query. The order of the field values must match the order of the order by clauses of the query.
-
startAt(
DocumentSnapshot snapshot) → Query - Creates and returns a new Query instance that applies a field mask to the result and returns only the specified subset of fields. You can specify a list of field paths to return, or use an empty list to only return the references of matching documents.
-
toString(
) → String -
A string representation of this object.
inherited
-
where(
Filter filter) → Query - Creates and returns a new Query{@link Query} with the additional filter that documents should satisfy the relation constraint provided. Documents must contain the field specified in the filter.
-
whereFieldPath(
JSAny fieldPath, String opStr, JSAny value) → Query - Creates and returns a new Query with the additional filter that documents must contain the specified field and that its value should satisfy the relation constraint provided.
-
withConverter(
FirestoreDataConverter? converter) → Query -
Applies a custom data converter to this Query, allowing you to use your
own custom model objects with Firestore. When you call get() on the
returned Query, the provided converter will convert between Firestore
data of type
NewDbModelType
and your custom typeNewAppModelType
.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited