Add support for min_length / max_length keywords

on basic ModelFields

1 files changed, 11 insertions, 0 deletions

diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index c68c39b5..01cf5ae3 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -215,8 +215,19 @@ class ModelField(WritableField):
             self.model_field = kwargs.pop('model_field')
         except:
             raise ValueError("ModelField requires 'model_field' kwarg")
+
+        self.min_length = kwargs.pop('min_length',
+                            getattr(self.model_field, 'min_length', None))
+        self.max_length = kwargs.pop('max_length',
+                            getattr(self.model_field, 'max_length', None))
+        
         super(ModelField, self).__init__(*args, **kwargs)
 
+        if self.min_length is not None:
+            self.validators.append(validators.MinLengthValidator(self.min_length))
+        if self.max_length is not None:
+            self.validators.append(validators.MaxLengthValidator(self.max_length))
+
     def from_native(self, value):
         rel = getattr(self.model_field, "rel", None)
         if rel is not None: