X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;ds=sidebyside;f=plomtask%2Fdb.py;h=34b5887c0204532ea6a32ade0eed6ccea92fbbaa;hb=704c00a101fc1922158a3a71a043562d34b696ad;hp=ebd8c6c544fd9dd3aca7e040bccb3d354629806d;hpb=8570f4ce4d44b813a1f02b72c5c45a57d2003bae;p=plomtask

diff --git a/plomtask/db.py b/plomtask/db.py
index ebd8c6c..34b5887 100644
--- a/plomtask/db.py
+++ b/plomtask/db.py
@@ -102,7 +102,8 @@ class DatabaseConnection:
         return [row[0] for row in
                 self.exec(f'SELECT {column} FROM {table_name}')]
 
-    def delete_where(self, table_name: str, key: str, target: int) -> None:
+    def delete_where(self, table_name: str, key: str,
+                     target: int | str) -> None:
         """Delete from table where key == target."""
         self.exec(f'DELETE FROM {table_name} WHERE {key} = ?', (target,))
 
@@ -222,15 +223,39 @@ class BaseModel(Generic[BaseModelId]):
                 items[item.id_] = item
         return list(items.values())
 
-    def save_core(self, db_conn: DatabaseConnection,
-                  update_with_lastrowid: bool = True) -> None:
-        """Write bare-bones self (sans connected items), ensuring self.id_."""
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, self.__class__):
+            msg = 'cannot compare to object of different class'
+            raise HandledException(msg)
+        to_hash_me = tuple([self.id_] +
+                           [getattr(self, name) for name in self.to_save])
+        to_hash_other = tuple([other.id_] +
+                              [getattr(other, name) for name in other.to_save])
+        return hash(to_hash_me) == hash(to_hash_other)
+
+    def save_core(self, db_conn: DatabaseConnection) -> None:
+        """Write bare-bones self (sans connected items), ensuring self.id_.
+
+        Write both to DB, and to cache. To DB, write .id_ and attributes
+        listed in cls.to_save.
+
+        Ensure self.id_ by setting it to what the DB command returns as the
+        last saved row's ID (cursor.lastrowid), EXCEPT if self.id_ already
+        exists as a 'str', which implies we do our own ID creation (so far
+        only the case with the Day class, where it's to be a date string.
+        """
         values = tuple([self.id_] + [getattr(self, key)
                                      for key in self.to_save])
         q_marks = DatabaseConnection.q_marks_from_values(values)
         table_name = self.table_name
         cursor = db_conn.exec(f'REPLACE INTO {table_name} VALUES {q_marks}',
                               values)
-        if update_with_lastrowid:
+        if not isinstance(self.id_, str):
             self.id_ = cursor.lastrowid  # type: ignore[assignment]
         self.cache()
+
+    def remove(self, db_conn: DatabaseConnection) -> None:
+        """Remove from DB."""
+        assert isinstance(self.id_, int | str)
+        self.uncache()
+        db_conn.delete_where(self.table_name, 'id', self.id_)