public Dictionary <string, ArgumentValue> CoerceArgumentValues(
ObjectType objectType,
FieldSelection fieldSelection,
VariableCollection variables)
{
Dictionary <string, ArgumentValue> coercedArgumentValues =
new Dictionary <string, ArgumentValue>();
Dictionary <string, IValueNode> argumentValues =
fieldSelection.Node.Arguments
.Where(t => t.Value != null)
.ToDictionary(t => t.Name.Value, t => t.Value);
foreach (InputField argument in fieldSelection.Field.Arguments.Values)
{
string argumentName = argument.Name;
IInputType argumentType = argument.Type;
IValueNode defaultValue = argument.DefaultValue;
object argumentValue = CoerceArgumentValue(
argumentName, argumentType, defaultValue,
variables, argumentValues);
if (argumentType is NonNullType && argumentValue == null)
{
throw new QueryException(new ArgumentError(
$"The argument type of '{argumentName}' is a non-null type.",
argumentName, fieldSelection.Node));
}
coercedArgumentValues[argumentName] = new ArgumentValue(
argumentType, argumentType.NativeType, argumentValue);
}
return(coercedArgumentValues);
}
private T ConvertArgumentValue <T>(string name, ArgumentValue argumentValue)
{
if (argumentValue.Value is T value)
{
return(value);
}
Type type = typeof(T);
if (argumentValue.Value == null)
{
return(default(T));
}
if (TryConvertValue(argumentValue, out value))
{
return(value);
}
throw new QueryException(
new FieldError(
$"Could not convert argument {name} from " +
$"{argumentValue.NativeType.FullName} to " +
$"{typeof(T).FullName}.",
_resolverTask.FieldSelection.Node));
}
public ArgumentValueSnapshot(
string name,
ArgumentValue argumentValue)
{
Name = name;
Type = TypeVisualizer.Visualize(argumentValue.Type);
Value = argumentValue.Value;
}
private T ConvertArgumentValue <T>(string name, ArgumentValue argumentValue)
{
if (argumentValue.Value is T value)
{
return(value);
}
if (argumentValue.Value == null)
{
return(default);
private bool TryConvertValue <T>(ArgumentValue argumentValue, out T value)
{
foreach (IInputValueConverter converter in _converters
.Where(t => t.CanConvert(argumentValue.Type)))
{
if (converter.TryConvert(argumentValue.NativeType, typeof(T),
argumentValue.Value, out object cv))
{
value = (T)cv;
return(true);
}
}
value = default(T);
return(false);
}
