Fixes: #20004, #18950

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Changelog Entry

Description

Optimizes /api/models endpoint performance by replacing sequential database queries with batch loading. The get_filtered_models() functions were calling Models.get_model_by_id() in a loop for each model, creating N database queries and loading heavy meta fields containing base64 profile images. This change reduces database queries from N to 1 and excludes unnecessary image data from access control checks.

Changed

• Added ModelAccessControl response model containing only id, user_id, and access_control fields
• Added get_models_access_control_by_ids() batch loading method to ModelsTable class
• Updated get_filtered_models() in backend/open_webui/utils/models.py to use batch loading
• Updated get_filtered_models() in backend/open_webui/routers/openai.py to use batch loading
• Updated get_filtered_models() in backend/open_webui/routers/ollama.py to use batch loading

Fixed

• Performance degradation in /api/models endpoint with increasing number of models (Base64 encoded images in models profile_img_url slow down model access filter #20004, issue: /api/models endpoint slow & very heavy with larger instances #18950)
• Sequential database queries loading base64 profile images during access control checks

Security

• [List any new or updated security-related changes, including vulnerability fixes]

Breaking Changes

• BREAKING CHANGE: [List any breaking changes affecting compatibility or functionality]

Additional Information

• Database queries reduced from N (number of models) to 1 batch query
• Meta field with base64 images excluded from access control queries
• Significantly faster response times for endpoints with many models

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