Condition class final

A conditional expression that can be evaluated at runtime.

Conditions are used to make dynamic decisions in the application based on the current state or user input. They can be used for:

• Navigation guards
• Content visibility
• Feature flags
• A/B testing

Example CMS schema:

export const condition = defineType({
  name: 'condition',
  fields: [
    {
      name: 'configuration',
      type: 'reference',
      to: [{type: 'condition.config'}],
    },
  ],
});

Example usage:

final condition = Condition(
  configuration: UserRoleCondition(
    allowedRoles: ['admin', 'editor'],
  ),
);

// Evaluate the condition
final result = await condition.execute(context);
if (result == null) {
  // Condition passed
} else {
  // Condition failed with error message
  print('Access denied: $result');
}

Annotations

• @JsonSerializable()

Constructors

Condition.new({ConditionConfiguration? configuration})

Creates a new condition with the given configuration.

Condition.fromJson(Map<String, dynamic> json)

Creates a condition from a JSON object.

factory

Properties

configuration → ConditionConfiguration?

The configuration that defines the condition's logic.

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

execute(BuildContext context) → Future<String?>

Evaluates the condition in the current context.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited