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From AutoMapper Profiles to Mapster: Centralizing your mapping logic

Due to the licensing changes for AutoMapper, we decided to make the switch to Mapster. Although most changes where rather obvious and easy to achieve, there was one question we couldn’t answer immediatelly: 

"How do I organize my mapping configurations like I did with AutoMapper Profiles?"

While Mapster doesn't have a direct equivalent to AutoMapper's Profile class, it offers enough flexibility to create your own alternative.

The AutoMapper Profile pattern

In AutoMapper, we organized our mappings like this:

We can add the profiles by automatically scanning for profiles:

Mapster's Approach: Configuration classes

Mapster allows you to specify the mapping configuration through the TypeAdapterConfig class. Here is the same mapping as shown above:

But using this approach doesn’t allow us to scan for configuration classes automatically. 

An approach that does work is by creating a class that implements the Mapster IRegistration interface:

Now we can use the Scan method to find and register IRegistration instances:

More information

MapsterMapper/Mapster: A fast, fun and stimulating object to object Mapper

Getting Started With Mapster in ASP.NET Core - Code Maze

AutoMapper and MediatR Licensing Update

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