412 PRECONDITION FAILED when _etag is correct

[xibriz]

Expected Behavior: 204 NO CONTENT

Actual Behavior: 412 PRECONDITION FAILED

If SOFT_DELETE is set to True on a global level and an endpoint is defined without a schema, it becomes impossible to delete.

Example endpoint:

my_endpoint = {
    'cache_control': 'no-store',
    'resource_methods': ['GET', 'POST'],
    'item_methods': ['DELETE'],
    'allow_unknown': True,
    'schema': {}
}

I found two work arounds:

1. Add 'soft_delete': False to the configuration
2. Set 'allow_unknown': False and define a schema

Either the response should be someting else becase the _etag is correct or the bug should be fixed.

Environment

• Python version: 3.8.10
• Eve version: 1.1.5

[ljluestc]

from eve import Eve

app = Eve()

@app.route('/<resource_name>/<item_id>', methods=['DELETE'])
def custom_delete(resource_name, item_id):
# Check if the resource allows soft delete and has no schema defined
if app.config.get('SOFT_DELETE', False) and resource_name in app.config['DOMAIN'] and 'schema' not in app.config['DOMAIN'][resource_name]:
# Return a custom error response for the 412 status code
response = {
'_status': 'ERR',
'_error': {
'code': 412,
'message': 'Soft delete is enabled, but resource has no schema defined. Please define a schema or disable soft delete.'
}
}
return response, 412

# Continue with regular item deletion logic
# ...

if name == 'main':
app.run()