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Add support for returning field choices for GET action.

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The enum-style field choices can be useful as query parameters to GET requests, so it can be useful to be able to determine what they are via an OPTIONS request.
This commit is contained in:
Alexander Kinneer 2020-11-19 15:49:34 -06:00
parent 96993d817a
commit 8889c85125
1 changed files with 16 additions and 4 deletions
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20
rest_framework/metadata.py
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@ -73,10 +73,13 @@ class SimpleMetadata(BaseMetadata):
def determine_actions(self, request, view): def determine_actions(self, request, view):
""" """
For generic class based views we return information about For generic class based views we return information about
the fields that are accepted for 'PUT' and 'POST' methods. the fields that are accepted for 'PUT' and 'POST' methods,
or the choice fields that may be available for use as query
parameters with the 'GET' method.
""" """
actions = {} actions = {}
for method in {'PUT', 'POST'} & set(view.allowed_methods): metadata = None
for method in {'GET', 'PUT', 'POST'} & set(view.allowed_methods):
view.request = clone_request(request, method) view.request = clone_request(request, method)
try: try:
# Test global permissions # Test global permissions
@ -90,8 +93,17 @@ class SimpleMetadata(BaseMetadata):
else: else:
# If user has appropriate permissions for the view, include # If user has appropriate permissions for the view, include
# appropriate metadata about the fields that should be supplied. # appropriate metadata about the fields that should be supplied.
serializer = view.get_serializer() if not metadata:
actions[method] = self.get_serializer_info(serializer) serializer = view.get_serializer()
metadata = self.get_serializer_info(serializer)
if method == 'GET':
filtered_metadata = {}
for field_name, field_info in metadata.items():
if 'choices' in field_info:
filtered_metadata[field_name] = {'choices': field_info['choices']}
actions[method] = filtered_metadata
else:
actions[method] = metadata
finally: finally:
view.request = request view.request = request