UniqueRule<T extends Model> class

Validation rule that ensures a field value is unique in persistent storage.

The rule queries the target model type T using the configured column and passes validation only when no existing record is found.

Example:

final rule = UniqueRule<User>(column: 'email');

Constructors

UniqueRule({required String column})

Creates a uniqueness rule for the given model column.

Properties

column → String

The database column to check for uniqueness.

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

validate({dynamic value}) → Future<bool>

Validates that value does not already exist for the configured column.

Operators

operator ==(Object other) → bool

The equality operator.

inherited