Throw custom error when a mapping error occurs with Automapper in a ASP.NET Core 6 Web API project

Question

I have an ASP.NET Core 6 Web API project and I am using AutoMapper. This is how I am configuring it in my Startup class:

services.AddAutoMapper(Assembly.GetExecutingAssembly());

Is there a way to configure AutoMapper to throw a custom exception when 2 types cannot be mapped? I have more than 10 mapping profiles in my project and I would like a certain error to be thrown when the types cannot be mapped.

I am using .NET 6.0

Automapper doesn't let an exception escape directly from the mapping process,but you could try and wrap it in its own Exception follow this issue :stackoverflow.com/questions/22409895/… — Ruikai Feng
– Ruikai Feng, Commented Sep 27, 2023 at 2:47
I mentioned that I have more mapping profiles in the project and I am mapping in many places, so I would prefer a solution where I configure this exception in one place — Buda Gavril
– Buda Gavril, Commented Sep 27, 2023 at 6:17

Mahdi · Accepted Answer · 2023-10-16 17:21:24Z

0

AutoMapper throws an AutoMapperMappingException on missed mapping errors.

You can a use middleware to handle the exceptions of type AutoMapperMappingException and do any on it and return specific messages when this error rises.

answered Oct 16, 2023 at 17:21

Mahdi

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