Improvements upon columns definition

columns.py

@@ -9,13 +9,21 @@ class ColumnDefinition:
     def sql(self):
         raise NotImplementedError
 
+    def serialize(self):
+        raise NotImplementedError
 
+
+# TODO: Not so good implementation (maybe)
 class UniqueColumnDefinition(ColumnDefinition):
-    def __init__(self, name: str):
+    def __init__(self, wrapped: ColumnDefinition):
-        super().__init__(name)
+        super().__init__(wrapped.name)
+        self.wrapped = wrapped
 
     def sql(self):
-        return SQL("{} UNIQUE").format(Identifier(self.name))
+        return SQL("{} UNIQUE").format(self.wrapped.sql())
+
+    def serialize(self):
+        return self.wrapped.serialize()
 
 
 def make_column_unique(column) -> UniqueColumnDefinition:
@@ -29,6 +37,9 @@ class PrimarySerialColumnDefinition(ColumnDefinition):
     def sql(self):
         return SQL("{} SERIAL PRIMARY KEY").format(Identifier(self.name))
 
+    def serialize(self):
+        return f"{self.name}:int"
+
 
 class PrimaryUUIDColumnDefinition(ColumnDefinition):
     def __init__(self, name: str):
@@ -39,6 +50,9 @@ class PrimaryUUIDColumnDefinition(ColumnDefinition):
             Identifier(self.name)
         )
 
+    def serialize(self):
+        return f"{self.name}:uuid"
+
 
 class TextColumnDefinition(ColumnDefinition):
     def __init__(self, name: str, default: str | None = None):
@@ -53,6 +67,9 @@ class TextColumnDefinition(ColumnDefinition):
                 Identifier(self.name), Literal(self.default)
             )
 
+    def serialize(self):
+        return f"{self.name}:str"
+
 
 class BigintColumnDefinition(ColumnDefinition):
     def __init__(self, name: str, default: int | None = None):
@@ -67,6 +84,9 @@ class BigintColumnDefinition(ColumnDefinition):
                 Identifier(self.name), Literal(self.default)
             )
 
+    def serialize(self):
+        return f"{self.name}:bigint"
+
 
 class BooleanColumnDefinition(ColumnDefinition):
     def __init__(self, name: str, default: bool | None = None):
@@ -81,6 +101,9 @@ class BooleanColumnDefinition(ColumnDefinition):
                 Identifier(self.name), Literal(self.default)
             )
 
+    def serialize(self):
+        return f"{self.name}:bool"
+
 
 class DateColumnDefinition(ColumnDefinition):
     def __init__(self, name: str, default: date | None = None):
@@ -95,6 +118,9 @@ class DateColumnDefinition(ColumnDefinition):
                 Identifier(self.name), Literal(self.default)
             )
 
+    def serialize(self):
+        return f"{self.name}:date"
+
 
 class TimestampColumnDefinition(ColumnDefinition):
     def __init__(self, name: str, default: date | None = None):
@@ -109,6 +135,9 @@ class TimestampColumnDefinition(ColumnDefinition):
                 Identifier(self.name), Literal(self.default)
             )
 
+    def serialize(self):
+        return f"{self.name}:datetime"
+
 
 class DoubleColumnDefinition(ColumnDefinition):
     def __init__(self, name: str, default: float | None = None):
@@ -123,6 +152,9 @@ class DoubleColumnDefinition(ColumnDefinition):
                 Identifier(self.name), Literal(self.default)
             )
 
+    def serialize(self):
+        return f"{self.name}:float"
+
 
 class IntegerColumnDefinition(ColumnDefinition):
     def __init__(self, name: str, default: int | None = None):
@@ -137,6 +169,9 @@ class IntegerColumnDefinition(ColumnDefinition):
                 Identifier(self.name), Literal(self.default)
             )
 
+    def serialize(self):
+        return f"{self.name}:int"
+
 
 class UUIDColumnDefinition(ColumnDefinition):
     def __init__(self, name: str, default: str | None = None):
@@ -150,3 +185,6 @@ class UUIDColumnDefinition(ColumnDefinition):
             return SQL("{} UUID DEFAULT {}").format(
                 Identifier(self.name), Literal(self.default)
             )
+
+    def serialize(self):
+        return f"{self.name}:uuid"