X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=plomtask%2Fconditions.py;h=337970924ab25305d64abef13afe24148b0209b1;hb=23012cd370777b60a25839788d131173d2abee91;hp=a45260092fdc6c75a94846eb0893b775eb9316dd;hpb=ee18435127ad396c24dbee2c7efcdbe6810d5a91;p=plomtask

diff --git a/plomtask/conditions.py b/plomtask/conditions.py
index a452600..3379709 100644
--- a/plomtask/conditions.py
+++ b/plomtask/conditions.py
@@ -4,6 +4,7 @@ from typing import Any
 from sqlite3 import Row
 from plomtask.db import DatabaseConnection, BaseModel
 from plomtask.misc import VersionedAttribute
+from plomtask.exceptions import HandledException
 
 
 class Condition(BaseModel[int]):
@@ -35,6 +36,16 @@ class Condition(BaseModel[int]):
         self.title.save(db_conn)
         self.description.save(db_conn)
 
+    def remove(self, db_conn: DatabaseConnection) -> None:
+        """Remove from DB, with dependencies."""
+        assert isinstance(self.id_, int)
+        for item in ('process', 'todo'):
+            for attr in ('conditions', 'enables', 'disables'):
+                table_name = f'{item}_{attr}'
+                for _ in db_conn.row_where(table_name, 'condition', self.id_):
+                    raise HandledException('cannot remove Condition in use')
+        super().remove(db_conn)
+
 
 class ConditionsRelations:
     """Methods for handling relations to Conditions, for Todo and Process."""