Refactor get_field_info method to include max_digits and decimal_plac…

…es attributes in SimpleMetadata class (#8943)

* Refactor get_field_info method to include max_digits and decimal_places attributes in SimpleMetadata class

* Add new test to check decimal_field_info_type

* Update rest_framework/metadata.py

---------

Co-authored-by: Mahdi <mahdi@Mahdis-MacBook-Pro.local>
Co-authored-by: Asif Saif Uddin <auvipy@gmail.com>

rest_framework/metadata.py

@@ -124,7 +124,8 @@ def get_field_info(self, field):
         attrs = [
             'read_only', 'label', 'help_text',
             'min_length', 'max_length',
-            'min_value', 'max_value'
+            'min_value', 'max_value',
+            'max_digits', 'decimal_places'
         ]
 
         for attr in attrs:

tests/test_metadata.py

@@ -324,6 +324,13 @@ def test_related_field_choices(self):
             )
         assert 'choices' not in field_info
 
+    def test_decimal_field_info_type(self):
+        options = metadata.SimpleMetadata()
+        field_info = options.get_field_info(serializers.DecimalField(max_digits=18, decimal_places=4))
+        assert field_info['type'] == 'decimal'
+        assert field_info['max_digits'] == 18
+        assert field_info['decimal_places'] == 4
+
 
 class TestModelSerializerMetadata(TestCase):
     def test_read_only_primary_key_related_field(self):