{"record":{"id":"4427b5b2a8d191c4","repo":"iflytek/astron-agent","slug":"file-s-is-null","errorCode":null,"errorMessage":"file %s is null","messagePattern":"file (.+?) is null","errorType":"validation","errorClass":"Exception","httpStatus":null,"severity":"error","filePath":"core/plugin/link/utils/json_schemas/read_json_schemas.py","lineNumber":176,"sourceCode":"        :param dir_path:\n        \"\"\"\n        self.path = dir_path\n\n    def __call__(self, file: str) -> str:\n        \"\"\"\n        description: Synchronous call, read file information\n        :return:\n        \"\"\"\n        if not file.endswith(\".json\"):\n            raise Exception(\"file %s suffix not .json\" % file)\n        schema_info = None\n        if not os.path.exists(os.path.join(self.path, file)):\n            raise Exception(\"file %s not exit in dir %s\" % (file, self.path))\n        with open(os.path.join(self.path, file), encoding=\"utf8\") as file_handle:\n            schema_info = file_handle.read()\n\n        if not schema_info:\n            raise Exception(\"file %s is null\" % file)\n        return schema_info\n\n\nif __name__ == \"__main__\":\n    import jsonschema\n\n    # validate_data = {\n    #     \"header\": {\n    #         \"app_id\": \"xxxx\",\n    #         \"uid\": \"xxxxx\"\n    #     },\n    #     \"parameter\": {\n    #         \"chat\": {\n    #             \"domain\": \"generalv3.5\",\n    #             \"temperature\": 0.1,\n    #             \"max_tokens\": 1024,\n    #             \"top_k\": 3,\n    #             \"question_type\": \"not_knowledge\",","sourceCodeStart":158,"sourceCodeEnd":194,"githubUrl":"https://github.com/iflytek/astron-agent/blob/5e758547a83371a5a4b29dadf4ac03e8dd527635/core/plugin/link/utils/json_schemas/read_json_schemas.py#L158-L194","documentation":"After successfully opening and reading the file, __call__ checks the read content is non-empty. If the file exists but contains zero bytes (or only whitespace yields a falsy string), an Exception 'file %s is null' is raised.","triggerScenarios":"Calling the reader with a .json file that exists in the directory but is empty (0 bytes), e.g. a placeholder committed to the repo or a file truncated by a failed write.","commonSituations":"Empty placeholder schema files committed accidentally; interrupted writes/truncated files from bad deploys; files emptied by a build step; creating the file with touch and forgetting to fill it.","solutions":["Open the file and paste/restore the correct JSON schema content","Restore the file from version control (git checkout -- <file>) or re-download it","Delete the empty file if it is not needed, then ensure it is regenerated at build time"],"exampleFix":"// before (file exists but is empty)\n$ touch user_schema.json\n// after\n$ echo '{\"type\":\"object\"}' > user_schema.json","handlingStrategy":"validation","validationCode":"import os\np = os.path.join(schemas_dir, \"my_schema.json\")\nif os.path.getsize(p) == 0:\n    raise ValueError(f\"schema file is empty: {p}\")","typeGuard":null,"tryCatchPattern":"try:\n    schema = reader(\"my_schema.json\")\nexcept Exception as e:\n    logger.error(\"schema file empty or unreadable: %s\", e)\n    raise","preventionTips":["Never commit empty placeholder schema files; validate JSON content in CI","Restore schema files from VCS rather than recreating them by hand","Check file sizes after build steps that transform schemas"],"tags":["python","file","empty-content"],"backgroundTag":"empty-required-field","analyzedSha":"5e758547a83371a5a4b29dadf4ac03e8dd527635","analyzedAt":"2026-09-12T08:03:51.356Z","contentChangedAt":"2026-09-12T08:03:51.356Z","schemaVersion":2},"datasetVersion":"2026-09-19T12:17:13.211Z"}