Query<T> class abstract

Querying is how you find records that match certain conditions.

Available extensions

• QueryAggregation
• QueryDateAggregation

Constructors

Query()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

isar → Isar

The corresponding Isar instance.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

count() → Future<int>

Count how many objects match this query.

countSync() → int

Count how many objects match this query.

deleteAll() → Future<int>

Delete all objects that match this query. Returns the number of deleted objects.

deleteAllSync() → int

Delete all objects that match this query. Returns the number of deleted objects.

deleteFirst() → Future<bool>

Delete the first object that matches this query. Returns whether a object has been deleted.

deleteFirstSync() → bool

Delete the first object that matches this query. Returns whether a object has been deleted.

exportJson() → Future<List<Map<String, dynamic>>>

Export the results of this query as json.

exportJsonRaw<R>(R callback(Uint8List)) → Future<R>

Export the results of this query as json bytes.

exportJsonRawSync<R>(R callback(Uint8List)) → R

Export the results of this query as json bytes.

exportJsonSync() → List<Map<String, dynamic>>

Export the results of this query as json.

findAll() → Future<List<T>>

Find all objects that match this query.

findAllSync() → List<T>

Find all objects that match this query.

findFirst() → Future<T?>

Find the first object that matches this query or null if no object matches.

findFirstSync() → T?

Find the first object that matches this query or null if no object matches.

isEmpty() → Future<bool>

Returns true if there are no objects that match this query.

isEmptySync() → bool

Returns true if there are no objects that match this query.

isNotEmpty() → Future<bool>

Returns true if there are objects that match this query.

isNotEmptySync() → bool

Returns true if there are objects that match this query.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

watch({bool fireImmediately = false}) → Stream<List<T>>

Create a watcher that yields the results of this query whenever its results have (potentially) changed.

watchLazy({bool fireImmediately = false}) → Stream<void>

Watch the query for changes. If fireImmediately is true, an event will be fired immediately.

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

epsilon → const double

The default precision for floating point number queries.