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preview_url was assembled from a /api/view link whose type was chosen by matching the asset's tags against "input" then "output". Anything written anywhere else - temp above all, where preview nodes put their images - fell off the end of that chain and came back with no preview at all. Tags are user-editable, so removing one also silently destroyed the URL. Derive the URL from where the file actually sits instead. That covers every root /api/view serves, temp included, and no longer depends on tags or on a filename in user_metadata. A file outside those roots, or content no client can render from its own bytes, gets no preview URL rather than one that cannot work. Nominated previews are resolved a page at a time rather than per row, so a list costs one extra query however long it is. A preview that is soft-deleted or not visible to the caller drops out of that lookup and is no longer advertised. Co-authored-by: guill <jacob.e.segal@gmail.com>
Pytest Unit Tests
Install test dependencies
pip install -r tests-unit/requirements.txt
Run tests
pytest tests-unit/