Adding auto creation of opening transaction on create

api/app/core/types.py

@@ -7,8 +7,6 @@ from pydantic_core import core_schema
 
 @dataclass
 class MonetaryAmount:
-    amount: Decimal# = Field(decimal_places=2, default=0)
-
     @classmethod
     def __get_pydantic_core_schema__(
             cls, source: type[Any], handler: GetCoreSchemaHandler
@@ -16,26 +14,24 @@ class MonetaryAmount:
         assert source is MonetaryAmount
         return core_schema.no_info_after_validator_function(
             cls._validate,
-            core_schema.float_schema(multiple_of=0.01),
+            core_schema.decimal_schema(multiple_of=0.01),
             serialization=core_schema.plain_serializer_function_ser_schema(
                 cls._serialize,
                 info_arg=False,
-                return_schema=core_schema.float_schema(multiple_of=0.01),
+                return_schema=core_schema.decimal_schema(multiple_of=0.01),
             ),
         )
 
-    @staticmethod
-    def _validate(value: str) -> 'CompressedString':
-        inverse_dictionary: dict[str, int] = {}
-        text: list[int] = []
-        for word in value.split(' '):
-            if word not in inverse_dictionary:
-                inverse_dictionary[word] = len(inverse_dictionary)
-            text.append(inverse_dictionary[word])
-        return MonetaryAmount(
-            {v: k for k, v in inverse_dictionary.items()}, text
-        )
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
 
     @staticmethod
-    def _serialize(value: 'CompressedString') -> str:
+    def _validate(value: Decimal) -> 'MonetaryAmount':
+        if value.as_tuple()[2] < -2:
+            raise ValueError(f'{value} has more than two decimal places.')
+
+        return value
+
+    @staticmethod
+    def _serialize(value: 'MonetaryAmount') -> str:
         return value.amount