def value_node_from_pyvalue(val: object):
if isinstance(val, str):
val = val.replace('\\', '\\\\')
value = eql_quote.quote_literal(val)
return gql_ast.StringValue(value=value[1:-1])
elif isinstance(val, bool):
return gql_ast.BooleanValue(value=bool(val))
elif isinstance(val, int):
return gql_ast.IntValue(value=str(val))
elif isinstance(val, float):
return gql_ast.FloatValue(value=str(val))
elif isinstance(val, list):
return gql_ast.ListValue(
values=[value_node_from_pyvalue(v) for v in val])
elif isinstance(val, dict):
return gql_ast.ObjectValue(fields=[
gql_ast.ObjectField(name=n, value=value_node_from_pyvalue(v))
for n, v in val.items()
])
else:
raise ValueError(f'unexpected constant type: {type(val)!r}')
def get_schema_reflection_default(
self,
schema: s_schema.Schema,
) -> Optional[str]:
"""Return the default expression if this is a reflection of a
schema class field and the field has a defined default value.
"""
ptr = self.get_nearest_non_derived_parent(schema)
src = ptr.get_source(schema)
if src is None:
# This is an abstract pointer
return None
ptr_name = ptr.get_name(schema)
if ptr_name.module not in {'schema', 'sys', 'cfg'}:
# This isn't a reflection type
return None
if isinstance(src, Pointer):
# This is a link property
tgt = src.get_target(schema)
assert tgt is not None
schema_objtype = tgt
else:
assert isinstance(src, s_types.Type)
schema_objtype = src
assert isinstance(schema_objtype, so.QualifiedObject)
src_name = schema_objtype.get_name(schema)
mcls = so.ObjectMeta.get_schema_metaclass(src_name.name)
if mcls is None:
# This schema class is not (publicly) reflected.
return None
fname = ptr.get_shortname(schema).name
if not mcls.has_field(fname):
# This pointer is not a schema field.
return None
field = mcls.get_field(fname)
if not isinstance(field, so.SchemaField):
# Not a schema field, no default possible.
return None
f_default = field.default
if (f_default is None or f_default is so.NoDefault):
# No explicit default value.
return None
tgt = ptr.get_target(schema)
if f_default is so.DEFAULT_CONSTRUCTOR:
if (issubclass(
field.type,
(collections.abc.Set, collections.abc.Sequence),
) and not issubclass(field.type, (str, bytes))):
return f'<{tgt.get_displayname(schema)}>[]'
else:
return None
default = qlquote.quote_literal(json.dumps(f_default))
if tgt.is_enum(schema):
return f'<{tgt.get_displayname(schema)}><str>to_json({default})'
else:
return f'<{tgt.get_displayname(schema)}>to_json({default})'