Adds ImportFailedError for non-serializable types

pfbudget/core/command.py

@@ -51,10 +51,18 @@ class ImportCommand(Command):
         match self.format:
             case ExportFormat.JSON:
                 with open(self.fn, "r") as f:
-                    values = json.load(f)
-                    values = [self.what.deserialize(v) for v in values]
+                    try:
+                        values = json.load(f)
+                        values = [self.what.deserialize(v) for v in values]
+                    except json.JSONDecodeError as e:
+                        raise ImportFailedError(e)
+
             case ExportFormat.pickle:
                 with open(self.fn, "rb") as f:
                     values = pickle.load(f)
 
         self.__client.insert(values)
+
+
+class ImportFailedError(Exception):
+    pass

pfbudget/db/model.py

@@ -158,7 +158,7 @@ class Transaction(Base, Serializable):
             case "money":
                 return MoneyTransaction.deserialize(map)
             case "split":
-                raise NotImplementedError
+                return SplitTransaction.deserialize(map)
             case _:
                 return cls._deserialize(map)
 
@@ -193,7 +193,7 @@ idfk = Annotated[
 ]
 
 
-class BankTransaction(Transaction, Serializable):
+class BankTransaction(Transaction):
     bank: Mapped[Optional[bankfk]] = mapped_column(default=None)
 
     __mapper_args__ = {"polymorphic_identity": "bank", "polymorphic_load": "inline"}
@@ -210,7 +210,7 @@ class BankTransaction(Transaction, Serializable):
         return transaction
 
 
-class MoneyTransaction(Transaction, Serializable):
+class MoneyTransaction(Transaction):
     __mapper_args__ = {"polymorphic_identity": "money"}
 
     def serialize(self) -> Mapping[str, Any]:
@@ -226,6 +226,13 @@ class SplitTransaction(Transaction):
 
     __mapper_args__ = {"polymorphic_identity": "split", "polymorphic_load": "inline"}
 
+    def serialize(self) -> Mapping[str, Any]:
+        raise AttributeError
+
+    @classmethod
+    def deserialize(cls, map: Mapping[str, Any]) -> Self:
+        raise AttributeError
+
 
 class CategoryGroup(Base, Serializable):
     __tablename__ = "category_groups"

tests/mocks/transactions.py

@@ -5,9 +5,11 @@ from pfbudget.db.model import (
     BankTransaction,
     CategorySelector,
     MoneyTransaction,
+    Note,
     SplitTransaction,
     Transaction,
     TransactionCategory,
+    TransactionTag,
 )
 
 simple = [
@@ -48,3 +50,21 @@ split = [
     SplitTransaction(date(2023, 1, 1), "", Decimal("-5"), original=__original.id),
     SplitTransaction(date(2023, 1, 1), "", Decimal("-5"), original=__original.id),
 ]
+
+tagged = [
+    Transaction(
+        date(2023, 1, 1),
+        "",
+        Decimal("-10"),
+        tags={TransactionTag("tag#1"), TransactionTag("tag#1")},
+    )
+]
+
+noted = [
+    Transaction(
+        date(2023, 1, 1),
+        "",
+        Decimal("-10"),
+        note=Note("note#1"),
+    )
+]

tests/test_backup.py

@@ -6,9 +6,21 @@ from mocks import banks, categories, transactions
 from mocks.client import MockClient
 
 from pfbudget.common.types import ExportFormat
-from pfbudget.core.command import ExportCommand, ImportCommand
+from pfbudget.core.command import ExportCommand, ImportCommand, ImportFailedError
 from pfbudget.db.client import Client
-from pfbudget.db.model import Bank, Category, CategoryGroup, Tag, Transaction
+from pfbudget.db.model import (
+    Bank,
+    BankTransaction,
+    Category,
+    CategoryGroup,
+    MoneyTransaction,
+    Note,
+    SplitTransaction,
+    Tag,
+    Transaction,
+    TransactionCategory,
+    TransactionTag,
+)
 
 
 @pytest.fixture
@@ -20,8 +32,9 @@ params = [
     (transactions.simple, Transaction),
     (transactions.simple_transformed, Transaction),
     (transactions.bank, Transaction),
+    (transactions.bank, BankTransaction),
     (transactions.money, Transaction),
-    # (transactions.split, Transaction),  NotImplemented
+    (transactions.money, MoneyTransaction),
     ([banks.checking, banks.cc], Bank),
     ([categories.category_null, categories.category1, categories.category2], Category),
     (
@@ -36,6 +49,13 @@ params = [
     ([categories.tag_1], Tag),
 ]
 
+not_serializable = [
+    (transactions.split, SplitTransaction),
+    (transactions.simple_transformed, TransactionCategory),
+    (transactions.tagged, TransactionTag),
+    (transactions.noted, Note),
+]
+
 
 class TestBackup:
     @pytest.mark.parametrize("input, what", params)
@@ -58,3 +78,28 @@ class TestBackup:
         imported = other.select(what)
 
         assert originals == imported
+
+    @pytest.mark.parametrize("input, what", not_serializable)
+    def test_try_backup_not_serializable(
+        self, tmp_path: Path, input: Sequence[Any], what: Type[Any]
+    ):
+        file = tmp_path / "test.json"
+
+        client = MockClient()
+        client.insert(input)
+        originals = client.select(what)
+        assert originals
+
+        command = ExportCommand(client, what, file, ExportFormat.JSON)
+
+        with pytest.raises(AttributeError):
+            command.execute()
+
+        other = MockClient()
+        command = ImportCommand(other, what, file, ExportFormat.JSON)
+
+        with pytest.raises(ImportFailedError):
+            command.execute()
+
+        imported = other.select(what)
+        assert not imported