CAERIUS003 — Type must declare a primary constructor
Severity: Error Category: CaeriusNet.Generator Applies to: [GenerateDto], [GenerateTvp]
Cause
A type decorated with [GenerateDto] or [GenerateTvp] does not declare a primary constructor. The generated mapper relies exclusively on the ordered parameters of the primary constructor to materialise instances — initialisers, properties or secondary constructors are ignored on purpose to keep the SQL column / object-graph mapping deterministic.
How to fix
Declare a primary constructor whose parameters mirror the SQL result-set columns (DTO) or the TVP column ordering (TVP):
csharp
[GenerateDto]
public sealed partial record FooDto(int Id, string Name, DateTime CreatedAt);