Create SearchIndexer from JSON fails

[thulard]

• Package Name: azure-search-documents
• Package Version: 11.6.0
• Operating System: Windows Server 2025
• Python Version: 3.12.10

Describe the bug
SearchIndexer.from_dict() failed with error:

azure.core.exceptions.DeserializationError: Unable to deserialize {} into model <class 'azure.search.documents.indexes.models._models.SearchIndexer'>. SearchIndexer.__init__() missing 3 required keyword-only arguments: 'name', 'data_source_name', and 'target_index_name'

To Reproduce
Steps to reproduce the behavior:

1. create a json definition of the indexer
2. load the json
3. call SearchIndexer.from_dict()

import json
from azure.search.documents.indexes.models import SearchIndexer

# Define path to index definition
indexer_json_path = "indexer.json"

# Load JSON definition
with open(indexer_json_path, "r", encoding="utf-8") as f:
    indexer_json = json.load(f)

# Convert JSON to SearchIndexer object
indexer = SearchIndexer.from_dict(indexer_json)

Expected behavior
The SearchIndexer object should be create without error.

Additional context
Workaround is to call the internal function as follow:

indexer = SearchIndexer._from_generated(_SearchIndexer.from_dict(indexer_json))

[github-actions]

Hi @thulard, I'm an AI Support assistant here to help with your issue. While the Azure SDK team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

• The error indicates that the JSON dictionary is missing the required keys ("name", "data_source_name", and "target_index_name") needed by the SearchIndexer model.
• Check that the JSON definition exactly matches the property names expected by the SDK (in snake_case) before calling from_dict().
• If the JSON was generated by a previous version of the service or library, consider updating the JSON structure so that these required fields are included.
• For details on object construction and required fields, refer to the Azure.Search.Documents API documentation: https://github.com/Azure/azure-sdk-for-net/tree/main/sdk/search/Azure.Search.Documents

The Azure SDK team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!