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-rw-r--r--rest_framework/fields.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 500018f3..80eadf1e 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -769,7 +769,9 @@ class MultipleChoiceField(ChoiceField):
])
def to_representation(self, value):
- return [self.choice_strings_to_values[str(item)] for item in value]
+ return set([
+ self.choice_strings_to_values[str(item)] for item in value
+ ])
# File types...