[FIX] Add monkey-patch for flask-restx swagger multipart form support #713
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This change introduces a monkey-patch for the flask-restx `Swagger.serialize_operation` method to force Swagger to use "multipart/form-data" content type for multi-file uploads instead of "application/x-www-form-urlencoded", as required by our application. The patch applies the proposed changes from PR #542 in the flask-restx repository (python-restx/flask-restx#542), which is unlikely to be accepted into the main branch. The monkey-patch includes the following safety measures: - A hash verification system that checks the source code of `flask_restx.Swagger.serialize_operation` before applying the patch. This prevents potential issues if the underlying library code changes. - Early exit logic that detects if the patch has already been applied, preventing double-patching scenarios that were causing issues during pytest execution (where imports remain in memory but fixtures are re-run). - Logging to document whether the patch is successfully applied or skipped because it was already present. The patch is applied during application initialization through a new `monkey_patch_flask_restx()` function, which is called in the `create_app()` setup process. While this is not an ideal solution, the safeguards should sufficiently minimize risk in the absence of upstream support for this behavior.
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This change introduces a monkey-patch for the flask-restx
Swagger.serialize_operationmethod to force Swagger to use "multipart/form-data" content type for multi-file uploads instead of "application/x-www-form-urlencoded", as required by our application. The patch applies the proposed changes from PR 542 in the flask-restx repository (python-restx/flask-restx#542), which is unlikely to be accepted into the main branch.The monkey-patch includes the following safety measures:
flask_restx.Swagger.serialize_operationbefore applying the patch. This prevents potential issues if the underlying library code changes.The patch is applied during application initialization through a new
monkey_patch_flask_restx()function, which is called in thecreate_app()setup process. While this is not an ideal solution, the safeguards should sufficiently minimize risk in the absence of upstream support for this behavior.