Query class - firebase_database library

Properties

hashCode → int: The hash code for this object.
no setterinherited
onChildAdded → Stream<DatabaseEvent>: Fires when children are added.
no setter
onChildChanged → Stream<DatabaseEvent>: Fires when children are changed.
no setter
onChildMoved → Stream<DatabaseEvent>: Fires when children are moved.
no setter
onChildRemoved → Stream<DatabaseEvent>: Fires when children are removed. previousChildKey is null.
no setter
onValue → Stream<DatabaseEvent>: Fires when the data at this location is updated. previousChildKey is null.
no setter
path → String: Slash-delimited path representing the database location of this query.
no setter
ref → DatabaseReference: Obtains a DatabaseReference corresponding to this query's location.
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

endAt(Object? value, {String? key}) → Query: Create a query constrained to only return child nodes with a value less than or equal to the given value, using the given orderBy directive or priority as default, and optionally only child nodes with a key less than or equal to the given key.
endBefore(Object? value, {String? key}) → Query: Creates a Query with the specified ending point (exclusive) The ending point is exclusive. If only a value is provided, children with a value less than the specified value will be included in the query. If a key is specified, then children must have a value lesss than or equal to the specified value and a key name less than the specified key.
equalTo(Object? value, {String? key}) → Query: Create a query constrained to only return child nodes with the given value (and key, if provided).
get() → Future<DataSnapshot>: Gets the most up-to-date result for this query.
keepSynced(bool value) → Future<void>: By calling keepSynced(true) on a location, the data for that location will automatically be downloaded and kept in sync, even when no listeners are attached for that location. Additionally, while a location is kept synced, it will not be evicted from the persistent disk cache.
limitToFirst(int limit) → Query: Create a query with limit and anchor it to the start of the window.
limitToLast(int limit) → Query: Create a query with limit and anchor it to the end of the window.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
once([DatabaseEventType eventType = DatabaseEventType.value]) → Future<DatabaseEvent>: Listens for exactly one event of the specified event type, and then stops listening. Defaults to DatabaseEventType.value if no eventType provided.
orderByChild(String path) → Query: Generate a view of the data sorted by values of a particular child path.
orderByKey() → Query: Generate a view of the data sorted by key.
orderByPriority() → Query: Generate a view of the data sorted by priority.
orderByValue() → Query: Generate a view of the data sorted by value.
startAfter(Object? value, {String? key}) → Query: Creates a Query with the specified starting point (exclusive). Using startAt, startAfter, endBefore, endAt and equalTo allows you to choose arbitrary starting and ending points for your queries.
startAt(Object? value, {String? key}) → Query: Create a query constrained to only return child nodes with a value greater than or equal to the given value, using the given orderBy directive or priority as default, and optionally only child nodes with a key greater than or equal to the given key.
toString() → String: A string representation of this object.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited