Add missing className option to generated associations.

Child/Parent associations need to specify the className key or the
incorrect classname will be inferred at runtime causing errors.

We're using the alias as a proxy for classname, as we can't use the
actual classname as bake may be using a base class replacement.

Refs #3791

src/Console/Command/Task/ModelTask.php

@@ -228,6 +228,7 @@ public function findBelongsTo($model, array $associations) {
 			} elseif ($fieldName === 'parent_id') {
 				$associations['belongsTo'][] = [
 					'alias' => 'Parent' . $model->alias(),
+					'className' => $model->alias(),
 					'foreignKey' => $fieldName
 				];
 			}
@@ -269,6 +270,7 @@ public function findHasMany($model, array $associations) {
 				} elseif ($otherTable == $tableName && $fieldName === 'parent_id') {
 					$assoc = [
 						'alias' => 'Child' . $model->alias(),
+						'className' => $model->alias(),
 						'foreignKey' => $fieldName
 					];
 				}

tests/TestCase/Console/Command/Task/ModelTaskTest.php

@@ -292,6 +292,7 @@ public function testBelongsToGeneration() {
 			'belongsTo' => [
 				[
 					'alias' => 'ParentCategoryThreads',
+					'className' => 'CategoryThreads',
 					'foreignKey' => 'parent_id'
 				],
 			]
@@ -324,6 +325,7 @@ public function testHasManyGeneration() {
 			'hasMany' => [
 				[
 					'alias' => 'ChildCategoryThreads',
+					'className' => 'CategoryThreads',
 					'foreignKey' => 'parent_id',
 				],
 			]