QueryReduceOperation<T extends ManagedObject?> class
abstract
Executes aggregate functions like average, count, sum, etc.
See instance methods for available aggregate functions.
See Query.reduce for more details on usage.
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
average(
num? selector(T object)) → Future< double?> - Computes the average of some ManagedObject property.
-
count(
) → Future< int?> - Counts the number of ManagedObject instances in the database.
-
maximum<
U> (U selector(T object)) → Future< U> - Finds the maximum of some ManagedObject property.
-
minimum<
U> (U selector(T object)) → Future< U> - Finds the minimum of some ManagedObject property.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
sum<
U extends num> (U selector(T object)) → Future< U> - Finds the sum of some ManagedObject property.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited