From: Christian Heller <c.heller@plomlompom.de>
Date: Fri, 14 Jun 2024 21:06:09 +0000 (+0200)
Subject: Minor BaseModel code re-organization.
X-Git-Url: https://plomlompom.com/repos/%7B%7Bprefix%7D%7D/blog?a=commitdiff_plain;h=b4a34a415fb31a00ee1e092fcc2a6b5d97edd52a;p=plomtask

Minor BaseModel code re-organization.
---

diff --git a/plomtask/db.py b/plomtask/db.py
index a47dff1..df98dd0 100644
--- a/plomtask/db.py
+++ b/plomtask/db.py
@@ -272,9 +272,11 @@ class BaseModel(Generic[BaseModelId]):
         assert isinstance(other.id_, int)
         return self.id_ < other.id_
 
+    # cache management
+
     @classmethod
-    def get_cached(cls: type[BaseModelInstance],
-                   id_: BaseModelId) -> BaseModelInstance | None:
+    def _get_cached(cls: type[BaseModelInstance],
+                    id_: BaseModelId) -> BaseModelInstance | None:
         """Get object of id_ from class's cache, or None if not found."""
         # pylint: disable=consider-iterating-dictionary
         cache = cls.get_cache()
@@ -311,6 +313,8 @@ class BaseModel(Generic[BaseModelId]):
         cache = self.__class__.get_cache()
         del cache[self.id_]
 
+    # object retrieval and generation
+
     @classmethod
     def from_table_row(cls: type[BaseModelInstance],
                        # pylint: disable=unused-argument
@@ -335,7 +339,7 @@ class BaseModel(Generic[BaseModelId]):
         """
         obj = None
         if id_ is not None:
-            obj = cls.get_cached(id_)
+            obj = cls._get_cached(id_)
             if not obj:
                 for row in db_conn.row_where(cls.table_name, 'id', id_):
                     obj = cls.from_table_row(db_conn, row)
@@ -413,6 +417,8 @@ class BaseModel(Generic[BaseModelId]):
             return filtered
         return items
 
+    # database writing
+
     def save(self, db_conn: DatabaseConnection) -> None:
         """Write self to DB and cache and ensure .id_.
 
@@ -442,7 +448,9 @@ class BaseModel(Generic[BaseModelId]):
 
     def remove(self, db_conn: DatabaseConnection) -> None:
         """Remove from DB and cache, including dependencies."""
-        if self.id_ is None or self.__class__.get_cached(self.id_) is None:
+        # pylint: disable=protected-access
+        # (since we remain within class)
+        if self.id_ is None or self.__class__._get_cached(self.id_) is None:
             raise HandledException('cannot remove unsaved item')
         for attr_name in self.to_save_versioned:
             getattr(self, attr_name).remove(db_conn)