Allow optional max_digits on DecimalField (#4377)

encode · Aug 10, 2016 · 48f3db3 · 48f3db3
1 parent 2d43b17
commit 48f3db3
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/rest_framework/fields.py b/rest_framework/fields.py
@@ -1016,7 +1016,8 @@ def quantize(self, value):
             return value
 
         context = decimal.getcontext().copy()
-        context.prec = self.max_digits
+        if self.max_digits is not None:
+            context.prec = self.max_digits
         return value.quantize(
             decimal.Decimal('.1') ** self.decimal_places,
             context=context

diff --git a/tests/test_fields.py b/tests/test_fields.py
@@ -876,6 +876,18 @@ class TestMinMaxDecimalField(FieldValues):
     )
 
 
+class TestNoMaxDigitsDecimalField(FieldValues):
+    field = serializers.DecimalField(
+        max_value=100, min_value=0,
+        decimal_places=2, max_digits=None
+    )
+    valid_inputs = {
+        '10': Decimal('10.00')
+    }
+    invalid_inputs = {}
+    outputs = {}
+
+
 class TestNoStringCoercionDecimalField(FieldValues):
     """
     Output values for `DecimalField` with `coerce_to_string=False`.