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import inspect
from collections import OrderedDict
from functools import partial
from six import string_types
from ..utils.module_loading import import_string
from .mountedtype import MountedType
from .unmountedtype import UnmountedType
def get_field_as(value, _as=None):
"""
Get type mounted
"""
if isinstance(value, MountedType):
return value
elif isinstance(value, UnmountedType):
if _as is None:
return value
return _as.mounted(value)
def yank_fields_from_attrs(attrs, _as=None, sort=True):
"""
Extract all the fields in given attributes (dict)
and return them ordered
"""
fields_with_names = []
for attname, value in list(attrs.items()):
field = get_field_as(value, _as)
if not field:
continue
fields_with_names.append((attname, field))
if sort:
fields_with_names = sorted(fields_with_names, key=lambda f: f[1])
return OrderedDict(fields_with_names)
def get_type(_type):
if isinstance(_type, string_types):
return import_string(_type)
if inspect.isfunction(_type) or isinstance(_type, partial):
return _type()
return _type
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