Retrieve a value from the given object. If a callable is assembled on this object's attribute, and passive is False, the callable will be executed and the resulting value will be set as the new value for this attribute.
(
self,
state: InstanceState[Any],
dict_: _InstanceDict,
passive: PassiveFlag = PASSIVE_OFF,
)
| 1071 | return value |
| 1072 | |
| 1073 | def get( |
| 1074 | self, |
| 1075 | state: InstanceState[Any], |
| 1076 | dict_: _InstanceDict, |
| 1077 | passive: PassiveFlag = PASSIVE_OFF, |
| 1078 | ) -> Any: |
| 1079 | """Retrieve a value from the given object. |
| 1080 | If a callable is assembled on this object's attribute, and |
| 1081 | passive is False, the callable will be executed and the |
| 1082 | resulting value will be set as the new value for this attribute. |
| 1083 | """ |
| 1084 | if self.key in dict_: |
| 1085 | return dict_[self.key] |
| 1086 | else: |
| 1087 | # if history present, don't load |
| 1088 | key = self.key |
| 1089 | if ( |
| 1090 | key not in state.committed_state |
| 1091 | or state.committed_state[key] is NO_VALUE |
| 1092 | ): |
| 1093 | if not passive & CALLABLES_OK: |
| 1094 | return PASSIVE_NO_RESULT |
| 1095 | |
| 1096 | value = self._fire_loader_callables(state, key, passive) |
| 1097 | |
| 1098 | if value is PASSIVE_NO_RESULT or value is NO_VALUE: |
| 1099 | return value |
| 1100 | elif value is ATTR_WAS_SET: |
| 1101 | try: |
| 1102 | return dict_[key] |
| 1103 | except KeyError as err: |
| 1104 | # TODO: no test coverage here. |
| 1105 | raise KeyError( |
| 1106 | "Deferred loader for attribute " |
| 1107 | "%r failed to populate " |
| 1108 | "correctly" % key |
| 1109 | ) from err |
| 1110 | elif value is not ATTR_EMPTY: |
| 1111 | return self.set_committed_value(state, dict_, value) |
| 1112 | |
| 1113 | if not passive & INIT_OK: |
| 1114 | return NO_VALUE |
| 1115 | else: |
| 1116 | return self._default_value(state, dict_) |
| 1117 | |
| 1118 | def _fire_loader_callables( |
| 1119 | self, state: InstanceState[Any], key: str, passive: PassiveFlag |
no test coverage detected