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Fix for #3863: validators are not thread safe #3870

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Fix for #3863: validators are not thread safe #3870

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3 changes: 3 additions & 0 deletions rest_framework/fields.py
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Original file line number Diff line number Diff line change
Expand Up @@ -491,6 +491,9 @@ def run_validators(self, value):
errors = []
for validator in self.validators:
if hasattr(validator, 'set_context'):
# Need to make a copy, because validator instances often
# are initialised globally
validator = copy.deepcopy(validator)
validator.set_context(self)

try:
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