update docs part 1

docs_src/models/docs003.py

@@ -8,26 +8,28 @@ metadata = sqlalchemy.MetaData()
 
 
 class Course(ormar.Model):
-    __database__ = database
-    __metadata__ = metadata
+    class Meta:
+        database = database
+        metadata = metadata
 
-    id = ormar.Integer(primary_key=True)
-    name = ormar.String(length=100)
-    completed = ormar.Boolean(default=False)
+    id: ormar.Integer(primary_key=True)
+    name: ormar.String(max_length=100)
+    completed: ormar.Boolean(default=False)
 
-print(Course.__pydantic_model__.__fields__)
+
+print(Course.__fields__)
 """
 Will produce:
-{'completed': ModelField(name='completed', 
-                         type=bool, 
-                         required=False, 
-                         default=False),
- 'id':        ModelField(name='id', 
+{'id':        ModelField(name='id', 
                          type=Optional[int], 
                          required=False, 
                          default=None),
  'name':      ModelField(name='name', 
                          type=Optional[str], 
                          required=False, 
-                         default=None)}
+                         default=None),
+'completed':  ModelField(name='completed', 
+                         type=bool, 
+                         required=False, 
+                         default=False)}
 """