A special dict so we can watch any changes.
| 39 | |
| 40 | |
| 41 | class BaseDict(dict): |
| 42 | """A special dict so we can watch any changes.""" |
| 43 | |
| 44 | _dereferenced = False |
| 45 | _instance = None |
| 46 | _name = None |
| 47 | |
| 48 | def __init__(self, dict_items, instance, name): |
| 49 | BaseDocument = _import_class("BaseDocument") |
| 50 | |
| 51 | if isinstance(instance, BaseDocument): |
| 52 | self._instance = weakref.proxy(instance) |
| 53 | self._name = name |
| 54 | super().__init__(dict_items) |
| 55 | |
| 56 | def get(self, key, default=None): |
| 57 | # get does not use __getitem__ by default so we must override it as well |
| 58 | try: |
| 59 | return self.__getitem__(key) |
| 60 | except KeyError: |
| 61 | return default |
| 62 | |
| 63 | def __getitem__(self, key): |
| 64 | value = super().__getitem__(key) |
| 65 | |
| 66 | EmbeddedDocument = _import_class("EmbeddedDocument") |
| 67 | if isinstance(value, EmbeddedDocument) and value._instance is None: |
| 68 | value._instance = self._instance |
| 69 | elif isinstance(value, dict) and not isinstance(value, BaseDict): |
| 70 | value = BaseDict(value, None, f"{self._name}.{key}") |
| 71 | super().__setitem__(key, value) |
| 72 | value._instance = self._instance |
| 73 | elif isinstance(value, list) and not isinstance(value, BaseList): |
| 74 | value = BaseList(value, None, f"{self._name}.{key}") |
| 75 | super().__setitem__(key, value) |
| 76 | value._instance = self._instance |
| 77 | return value |
| 78 | |
| 79 | def __getstate__(self): |
| 80 | self.instance = None |
| 81 | self._dereferenced = False |
| 82 | return self |
| 83 | |
| 84 | def __setstate__(self, state): |
| 85 | self = state |
| 86 | return self |
| 87 | |
| 88 | __setitem__ = mark_key_as_changed_wrapper(dict.__setitem__) |
| 89 | __delattr__ = mark_key_as_changed_wrapper(dict.__delattr__) |
| 90 | __delitem__ = mark_key_as_changed_wrapper(dict.__delitem__) |
| 91 | pop = mark_as_changed_wrapper(dict.pop) |
| 92 | clear = mark_as_changed_wrapper(dict.clear) |
| 93 | update = mark_as_changed_wrapper(dict.update) |
| 94 | popitem = mark_as_changed_wrapper(dict.popitem) |
| 95 | setdefault = mark_as_changed_wrapper(dict.setdefault) |
| 96 | |
| 97 | def _mark_as_changed(self, key=None): |
| 98 | if hasattr(self._instance, "_mark_as_changed"): |