def select_field(query, *, args):
if args.first < 0:
raise g.GraphError(
"first must be non-negative integer, was {}".format(
args.first))
else:
return ConnectionQuery(type_query=query,
first=args.first,
after=args.after)
def read_result(self, value):
if len(value) == 0:
return None
elif len(value) == 1:
return value[0]
else:
raise g.GraphError(
"expected exactly zero or one values but got {}".format(
len(value)))
def read_results(self, iterable):
result = collections.defaultdict(lambda: None)
for key, value in iterable:
if key in result:
raise g.GraphError("expected exactly zero or one values")
else:
result[key] = value
return result
def read_results(self, iterable):
result = {}
for key, value in iterable:
if key in result:
raise g.GraphError("expected exactly one value")
else:
result[key] = value
return result
def get_field(field_query):
if field_query.field == schema.typename_field and isinstance(
query.type, schema.ObjectType):
return _ConstantField(query.type.name)
else:
field = fields().get(field_query.field)
if field is None:
raise g.GraphError("Resolver missing for field {}".format(
field_query.field.name))
elif callable(field):
# TODO: test dependencies are injected
return injector.call_with_dependencies(
field, graph, field_query)
else:
return field
def root_resolve_value(graph, query, args):
raise g.GraphError("BAD")