Auto-discover natural keys for FetchForWriting without explicit projection#4198
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jeremydmiller merged 1 commit intomasterfrom Mar 23, 2026
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…ction (#4197) When calling FetchForWriting<TDoc, TId> with a natural key type, Marten now auto-discovers [NaturalKey] attributes on the aggregate type and registers an Inline snapshot projection if none was explicitly configured. This enables FetchForWriting with natural keys on self-aggregating types without requiring an explicit Projections.Snapshot<T>() call. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This was referenced Mar 24, 2026
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Summary
InvalidOperationExceptionwhen usingFetchForWriting()with natural keys on self-aggregating types without explicit projection registrationFetchForWriting<TDoc, TId>is called with a natural key type (TIdis notGuid/string), Marten now auto-discovers[NaturalKey]attributes on the aggregate type and registers an Inline snapshot projection if none existsNaturalKeyFetchPlanner) to activate automaticallyTest plan
Bug_4197_fetch_for_writing_natural_keywith both auto-discovery and explicit registration tests🤖 Generated with Claude Code