QueryReduceOperation<T extends ManagedObject> class

Executes aggregate functions like average, count, sum, etc.

See instance methods for available aggregate functions.

See Query.reduce for more details on usage.

Constructors

QueryReduceOperation()

Properties

hashCode → int
The hash code for this object.
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

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. [...]
sum<U extends num>(U selector(T object)) → Future<U>
Finds the sum of some ManagedObject property. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toString() → String
Returns a string representation of this object.
inherited

Operators

operator ==(dynamic other) → bool
The equality operator.
inherited