Propogate 'default' from model_field to serializer field

Fix #7469.

Co-authored-by: Nikhil Benesch <[email protected]>

Author: john-parton

rest_framework/utils/field_mapping.py

@@ -101,6 +101,9 @@ def get_field_kwargs(field_name, model_field):
         kwargs['read_only'] = True
         return kwargs
 
+    if model_field.has_default():
+        kwargs['default'] = model_field.default
+
     if model_field.has_default() or model_field.blank or model_field.null:
         kwargs['required'] = False
 

tests/test_model_serializer.py

@@ -173,7 +173,7 @@ class Meta:
             TestSerializer():
                 auto_field = IntegerField(read_only=True)
                 big_integer_field = IntegerField()
-                boolean_field = BooleanField(required=False)
+                boolean_field = BooleanField(default=False, required=False)
                 char_field = CharField(max_length=100)
                 comma_separated_integer_field = CharField(max_length=100, validators=[<django.core.validators.RegexValidator object>])
                 date_field = DateField()
@@ -182,7 +182,7 @@ class Meta:
                 email_field = EmailField(max_length=100)
                 float_field = FloatField()
                 integer_field = IntegerField()
-                null_boolean_field = BooleanField(allow_null=True, required=False)
+                null_boolean_field = BooleanField(allow_null=True, default=False, required=False)
                 positive_integer_field = IntegerField()
                 positive_small_integer_field = IntegerField()
                 slug_field = SlugField(allow_unicode=False, max_length=100)
@@ -210,7 +210,7 @@ class Meta:
                 length_limit_field = CharField(max_length=12, min_length=3)
                 blank_field = CharField(allow_blank=True, max_length=10, required=False)
                 null_field = IntegerField(allow_null=True, required=False)
-                default_field = IntegerField(required=False)
+                default_field = IntegerField(default=0, required=False)
                 descriptive_field = IntegerField(help_text='Some help text', label='A label')
                 choices_field = ChoiceField(choices=(('red', 'Red'), ('blue', 'Blue'), ('green', 'Green')))
                 text_choices_field = ChoiceField(choices=(('red', 'Red'), ('blue', 'Blue'), ('green', 'Green')))