Add Todo/Process.blockers for Conditions that block rather than enable.

[plomtask] / plomtask / conditions.py

diff --git a/plomtask/conditions.py b/plomtask/conditions.py
index a6e9c97c6bdc05acf654ecda21317df1fbe04e85..8ab4282080b4898f8d08da4e443f8ac3d64131ee 100644 (file)
--- a/plomtask/conditions.py
+++ b/plomtask/conditions.py
@@ -40,7 +40,7 @@ class Condition(BaseModel[int]):
         if self.id_ is None:
             raise HandledException('cannot remove unsaved item')
         for item in ('process', 'todo'):
-            for attr in ('conditions', 'enables', 'disables'):
+            for attr in ('conditions', 'blockers', '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')
@@ -50,6 +50,12 @@ class Condition(BaseModel[int]):
 class ConditionsRelations:
     """Methods for handling relations to Conditions, for Todo and Process."""
 
+    def __init__(self) -> None:
+        self.conditions: list[Condition] = []
+        self.blockers: list[Condition] = []
+        self.enables: list[Condition] = []
+        self.disables: list[Condition] = []
+
     def set_conditions(self, db_conn: DatabaseConnection, ids: list[int],
                        target: str = 'conditions') -> None:
         """Set self.[target] to Conditions identified by ids."""
@@ -59,6 +65,11 @@ class ConditionsRelations:
         for id_ in ids:
             target_list += [Condition.by_id(db_conn, id_)]
 
+    def set_blockers(self, db_conn: DatabaseConnection,
+                     ids: list[int]) -> None:
+        """Set self.enables to Conditions identified by ids."""
+        self.set_conditions(db_conn, ids, 'blockers')
+
     def set_enables(self, db_conn: DatabaseConnection,
                     ids: list[int]) -> None:
         """Set self.enables to Conditions identified by ids."""