from typing import Any
from sqlite3 import Row
from plomtask.db import DatabaseConnection, BaseModel
-from plomtask.misc import VersionedAttribute
+from plomtask.versioned_attributes import VersionedAttribute
+from plomtask.exceptions import HandledException
class Condition(BaseModel[int]):
- """Non Process-dependency for ProcessSteps and Todos."""
+ """Non-Process dependency for ProcessSteps and Todos."""
table_name = 'conditions'
to_save = ['is_active']
self.description = VersionedAttribute(self, 'condition_descriptions',
'')
+ def __lt__(self, other: Condition) -> bool:
+ assert isinstance(self.id_, int)
+ assert isinstance(other.id_, int)
+ return self.id_ < other.id_
+
@classmethod
def from_table_row(cls, db_conn: DatabaseConnection,
row: Row | list[Any]) -> Condition:
self.title.save(db_conn)
self.description.save(db_conn)
+ def remove(self, db_conn: DatabaseConnection) -> None:
+ """Remove from DB, with VersionedAttributes.
+
+ Checks for Todos and Processes that depend on Condition, prohibits
+ deletion if found.
+ """
+ if self.id_ is None:
+ raise HandledException('cannot remove unsaved item')
+ 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')
+ db_conn.delete_where('condition_titles', 'parent', self.id_)
+ db_conn.delete_where('condition_descriptions', 'parent', self.id_)
+ super().remove(db_conn)
+
class ConditionsRelations:
"""Methods for handling relations to Conditions, for Todo and Process."""