protected function resolveField(FieldInterface $field, AstFieldInterface $ast, $parentValue = null, $fromObject = false)
{
try {
/** @var AbstractObjectType $type */
$type = $field->getType();
$nonNullType = $type->getNullableType();
if (self::TYPE_NAME_QUERY == $ast->getName()) {
return $nonNullType->getName();
}
$this->resolveValidator->assetTypeHasField($nonNullType, $ast);
$targetField = $nonNullType->getField($ast->getName());
$this->prepareAstArguments($targetField, $ast, $this->executionContext->getRequest());
$this->resolveValidator->assertValidArguments($targetField, $ast, $this->executionContext->getRequest());
switch ($kind = $targetField->getType()->getNullableType()->getKind()) {
case TypeMap::KIND_ENUM:
case TypeMap::KIND_SCALAR:
if ($ast instanceof AstQuery && $ast->hasFields()) {
throw new ResolveException(sprintf('You can\'t specify fields for scalar type "%s"', $targetField->getType()->getNullableType()->getName()), $ast->getLocation());
}
return $this->resolveScalar($targetField, $ast, $parentValue);
case TypeMap::KIND_OBJECT:
/** @var $type AbstractObjectType */
if (!$ast instanceof AstQuery) {
throw new ResolveException(sprintf('You have to specify fields for "%s"', $ast->getName()), $ast->getLocation());
}
return $this->resolveObject($targetField, $ast, $parentValue);
case TypeMap::KIND_LIST:
return $this->resolveList($targetField, $ast, $parentValue);
case TypeMap::KIND_UNION:
case TypeMap::KIND_INTERFACE:
if (!$ast instanceof AstQuery) {
throw new ResolveException(sprintf('You have to specify fields for "%s"', $ast->getName()), $ast->getLocation());
}
return $this->resolveComposite($targetField, $ast, $parentValue);
default:
throw new ResolveException(sprintf('Resolving type with kind "%s" not supported', $kind));
}
} catch (\Exception $e) {
$this->executionContext->addError($e);
if ($fromObject) {
throw $e;
}
return null;
}
}
