CAERIUS005 — CLR type has no faithful SQL Server mapping
Severity: Error Category: CaeriusNet.Analyzer Applies to: [GenerateDto], [GenerateTvp]
Cause
A parameter on a [GenerateDto] or [GenerateTvp] type uses a CLR type that the generator cannot map faithfully to a native SQL Server type. Emission for that input stops; CaeriusNet never falls back to SqlDbType.Variant (sql_variant).
Common offenders: System.Uri, System.Version, custom value objects, System.Net.IPAddress, arbitrary reference types, etc.
Why it matters
The fallback was unsafe because it silently changed the stored-procedure boundary, boxed values and lost faithful SQL facets. v12 requires an explicit, supported contract instead.
How to fix
Replace the offending property with a natively-mapped CLR type, or expose a conversion at the DTO/TVP boundary:
// Before — unsupported and no source is emitted.
[GenerateDto]
public sealed partial record EndpointDto(int Id, System.Uri Endpoint);
// After — explicit string mapping; SQL nvarchar works with all features.
[GenerateDto]
public sealed partial record EndpointDto(int Id, string Endpoint);Use a supported CLR/SQL boundary type or write a dedicated stored-procedure boundary conversion outside generated DTO/ TVP code. CAERIUS005 is a blocking contract diagnostic; suppressing it does not enable sql_variant generation.