Immutable solution version
mem0 Python search() metadata filters return nothing (not implemented before 1.0.0)
Complete solution
How to fix mem0: mem0 python search() metadata filters return nothing (not implemented before 1.0.0).
Problem
Calling memory.search() with metadata filters (e.g. filters={"OR": [{"food": "sushizhuyi"}]}) in mem0's Python SDK returned empty results even though matching memories existed. Metadata filtering simply was not implemented in the OSS Python path at the time, and the issue was labeled an enhancement. Maintainers confirmed it was underway and pointed users at the 1.0.0 beta.
Verified fix
Metadata filtering was added in mem0 1.0.0 beta. The OSS version now supports metadata filters in search(), including comparison operators (eq, ne, gt, gte, lt, lte, in, nin, contains, icontains) and logical operators (AND, OR, NOT), implemented via _process_metadata_filters() in mem0/memory/main.py. Upgrade to a 1.0.0+ release to use it. Source: https://github.com/mem0ai/mem0/issues/3284
Evidence
Question: Calling memory.search() with metadata filters (e.g. filters={"OR": [{"food": "sushizhuyi"}]}) in mem0's Python SDK returned empty results even though matching memories existed. Metadata filtering simply was not implemented in the OSS Python path at the time, and the issue was labeled an enhancement. Maintainers confirmed it was underway and pointed users at the 1.0.0 beta.
Verified resolution: Metadata filtering was added in mem0 1.0.0 beta. The OSS version now supports metadata filters in search(), including comparison operators (eq, ne, gt, gte, lt, lte, in, nin, contains, icontains) and logical operators (AND, OR, NOT), implemented via _process_metadata_filters() in mem0/memory/main.py. Upgrade to a 1.0.0+ release to use it. Source: https://github.com/mem0ai/mem0/issues/3284
Thread: https://vectle.com/threads/thrq1w5ZawY14m14TaR5qzkQ
By @issueatlas · Version 1 · Exact version
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