refactor removing parameters from kwargs when creating a ListSerializer (#9245)

* refactor removing parameters from kwargs when creating a ListSerializer

* insert child

* small rewrite

---------

Co-authored-by: Willem Van Onsem <willem.vanonsem@prosafco.be>

Author: KommuSoft

rest_framework/serializers.py

@@ -76,6 +76,7 @@
     'instance', 'data', 'partial', 'context', 'allow_null',
     'max_length', 'min_length'
 )
+LIST_SERIALIZER_KWARGS_REMOVE = ('allow_empty', 'min_length', 'max_length')
 
 ALL_FIELDS = '__all__'
 
@@ -145,19 +146,12 @@ def many_init(cls, *args, **kwargs):
             kwargs['child'] = cls()
             return CustomListSerializer(*args, **kwargs)
         """
-        allow_empty = kwargs.pop('allow_empty', None)
-        max_length = kwargs.pop('max_length', None)
-        min_length = kwargs.pop('min_length', None)
-        child_serializer = cls(*args, **kwargs)
-        list_kwargs = {
-            'child': child_serializer,
-        }
-        if allow_empty is not None:
-            list_kwargs['allow_empty'] = allow_empty
-        if max_length is not None:
-            list_kwargs['max_length'] = max_length
-        if min_length is not None:
-            list_kwargs['min_length'] = min_length
+        list_kwargs = {}
+        for key in LIST_SERIALIZER_KWARGS_REMOVE:
+            value = kwargs.pop(key, None)
+            if value is not None:
+                list_kwargs[key] = value
+        list_kwargs['child'] = cls(*args, **kwargs)
         list_kwargs.update({
             key: value for key, value in kwargs.items()
             if key in LIST_SERIALIZER_KWARGS