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Use faster CSafeDumper #1371

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Use faster CSafeDumper #1371

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6 changes: 4 additions & 2 deletions drf_spectacular/renderers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ class OpenApiYamlRenderer(BaseRenderer):

def render(self, data, accepted_media_type=None, renderer_context=None):
# disable yaml advanced feature 'alias' for clean, portable, and readable output
class Dumper(yaml.SafeDumper):
class Dumper(yaml.CSafeDumper):
def ignore_aliases(self, data):
return True

Expand Down Expand Up @@ -51,7 +51,9 @@ def uuid_representer(dumper, data):
Dumper.add_representer(UUID, uuid_representer)

def safestring_representer(dumper, data):
return dumper.represent_str(data)
# CSafeDumper needs actually a str instance, not a SafeString one.
# str(SafeString()) still returns SafeString.
return dumper.represent_str(super(SafeString, data).__str__())
Dumper.add_representer(SafeString, safestring_representer)

def ordereddict_representer(dumper, data):
Expand Down
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