MissingPropertyException class final

The error for a property read as required that no source has.

getRequiredProperty and getRequiredPropertyAs throw it instead of returning null, so code that needs a value can read it in one line and fail with a clear message ("Required key 'db.url' not found") when it is missing.

try {
  environment.getRequiredProperty('db.url');
} on MissingPropertyException catch (error) {
  log.warning(error.key); // db.url
}

Spring (Java):

// Spring throws IllegalStateException
// ("Required key 'db.url' not found").
String url = environment.getRequiredProperty("db.url");

Implemented types

• Exception

Constructors

MissingPropertyException(String key)

Creates the exception for the missing key.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

key → String

The key that was read and not found.

final

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.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited