diff --git a/.coverage b/.coverage
index 5fd9217..367e452 100644
Binary files a/.coverage and b/.coverage differ
diff --git a/orm/models/fakepydantic.py b/orm/models/fakepydantic.py
index 55fe51d..5e1d6b4 100644
--- a/orm/models/fakepydantic.py
+++ b/orm/models/fakepydantic.py
@@ -11,6 +11,7 @@ from typing import (
     TYPE_CHECKING,
     Type,
     TypeVar,
+    Union,
 )
 
 import databases
@@ -62,15 +63,10 @@ class FakePydantic(list, metaclass=ModelMetaclass):
 
     def __setattr__(self, key: str, value: Any) -> None:
         if key in self.__fields__:
-            if self._is_conversion_to_json_needed(key) and not isinstance(value, str):
-                try:
-                    value = json.dumps(value)
-                except TypeError:  # pragma no cover
-                    pass
-
+            value = self._convert_json(key, value, op="dumps")
             value = self.__model_fields__[key].expand_relationship(value, self)
 
-            relation_key = self.__class__.__name__.title() + "_" + key
+            relation_key = self.get_name(title=True) + "_" + key
             if not self._orm_relationship_manager.contains(relation_key, self):
                 setattr(self.values, key, value)
         else:
@@ -78,20 +74,12 @@ class FakePydantic(list, metaclass=ModelMetaclass):
 
     def __getattribute__(self, key: str) -> Any:
         if key != "__fields__" and key in self.__fields__:
-            relation_key = self.__class__.__name__.title() + "_" + key
+            relation_key = self.get_name(title=True) + "_" + key
             if self._orm_relationship_manager.contains(relation_key, self):
                 return self._orm_relationship_manager.get(relation_key, self)
 
             item = getattr(self.values, key, None)
-            if (
-                item is not None
-                and self._is_conversion_to_json_needed(key)
-                and isinstance(item, str)
-            ):
-                try:
-                    item = json.loads(item)
-                except TypeError:  # pragma no cover
-                    pass
+            item = self._convert_json(key, item, op="loads")
             return item
         return super().__getattribute__(key)
 
@@ -145,6 +133,23 @@ class FakePydantic(list, metaclass=ModelMetaclass):
         for key, value in value_dict.items():
             setattr(self, key, value)
 
+    def _convert_json(self, column_name: str, value: Any, op: str) -> Union[str, dict]:
+
+        if not self._is_conversion_to_json_needed(column_name):
+            return value
+
+        condition = (
+            isinstance(value, str) if op == "loads" else not isinstance(value, str)
+        )
+        operand = json.loads if op == "loads" else json.dumps
+
+        if condition:
+            try:
+                return operand(value)
+            except TypeError:  # pragma no cover
+                pass
+        return value
+
     def _is_conversion_to_json_needed(self, column_name: str) -> bool:
         return self.__model_fields__.get(column_name).__type__ == pydantic.Json
 
@@ -188,7 +193,6 @@ class FakePydantic(list, metaclass=ModelMetaclass):
     @classmethod
     def merge_two_instances(cls, one: "Model", other: "Model") -> "Model":
         for field in one.__model_fields__.keys():
-            # print(field, one.dict(), other.dict())
             if isinstance(getattr(one, field), list) and not isinstance(
                 getattr(one, field), orm.Model
             ):
diff --git a/orm/models/metaclass.py b/orm/models/metaclass.py
index 4ddb21e..d10806b 100644
--- a/orm/models/metaclass.py
+++ b/orm/models/metaclass.py
@@ -66,19 +66,21 @@ def register_reverse_model_fields(
 def sqlalchemy_columns_from_model_fields(
     name: str, object_dict: Dict, table_name: str
 ) -> Tuple[Optional[str], List[sqlalchemy.Column], Dict[str, BaseField]]:
-    pkname: Optional[str] = None
-    columns: List[sqlalchemy.Column] = []
-    model_fields: Dict[str, BaseField] = {}
+    columns = []
+    pkname = None
+    model_fields = {
+        field_name: field
+        for field_name, field in object_dict.items()
+        if isinstance(field, BaseField)
+    }
+    for field_name, field in model_fields.items():
+        if field.primary_key:
+            pkname = field_name
+        if not field.pydantic_only:
+            columns.append(field.get_column(field_name))
+        if isinstance(field, ForeignKey):
+            register_relation_on_build(table_name, field, name)
 
-    for field_name, field in object_dict.items():
-        if isinstance(field, BaseField):
-            model_fields[field_name] = field
-            if not field.pydantic_only:
-                if field.primary_key:
-                    pkname = field_name
-                if isinstance(field, ForeignKey):
-                    register_relation_on_build(table_name, field, name)
-                columns.append(field.get_column(field_name))
     return pkname, columns, model_fields
 
 
diff --git a/orm/relations.py b/orm/relations.py
index 7cf5ecf..c7ef8b6 100644
--- a/orm/relations.py
+++ b/orm/relations.py
@@ -49,9 +49,8 @@ class RelationshipManager:
             )
 
     def deregister(self, model: "FakePydantic") -> None:
-        # print(f'deregistering {model.__class__.__name__}, {model._orm_id}')
         for rel_type in self._relations.keys():
-            if model.__class__.__name__.lower() in rel_type.lower():
+            if model.get_name() in rel_type.lower():
                 if model._orm_id in self._relations[rel_type]:
                     del self._relations[rel_type][model._orm_id]