X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;ds=inline;f=plomtask%2Fversioned_attributes.py;h=cc42bbc40f761c35715f11b0ca4f61ba67dbe579;hb=84ff28d055b785e5f205f942c68ece72136e5af1;hp=d3c364942e3d76edf0eb9618df8366866c603709;hpb=1a9178b2b7bb66e77f3df01a0c7b2812839637ba;p=plomtask

diff --git a/plomtask/versioned_attributes.py b/plomtask/versioned_attributes.py
index d3c3649..cc42bbc 100644
--- a/plomtask/versioned_attributes.py
+++ b/plomtask/versioned_attributes.py
@@ -19,6 +19,18 @@ class VersionedAttribute:
         self.default = default
         self.history: dict[str, str | float] = {}
 
+    def __hash__(self) -> int:
+        history_tuples = tuple((k, v) for k, v in self.history.items())
+        hashable = (self.parent.id_, self.table_name, self.default,
+                    history_tuples)
+        return hash(hashable)
+
+    @property
+    def as_dict(self) -> dict[str, object]:
+        """Return self as (json.dumps-coompatible) dict."""
+        d = {'parent_id': self.parent.id_, 'history': self.history}
+        return d
+
     @property
     def _newest_timestamp(self) -> str:
         """Return most recent timestamp."""