ProjectTo ArgumentException "Argument types do not match" with dictionaries

[DaanWasscher]

https://gist.github.com/DaanWasscher/6a44c6843c6215f490e6c543108e0424

AutoMapper 10.1.1
net6.0

When the source and destination have a dictionary property for which the values need to be mapped it won't map with ProjectTo.

Calling Map results in a mapped result, all good.
Calling ProjectTo results in an argument exception from AutoMapper.

[lbargaoanu]

I don't know what EF provider supports that, but EF6 certainly doesn't.

[DaanWasscher]

In EF Core 6 entity configuration I have a valueconverter configured on the dictionary property that converts the dictionary to a json string when writing to database and back to dictionary upon reading from database.

I assumed that with EF Core's guidance for value-conversion in use that the projection with AutoMapper would work.

[lbargaoanu]

Drop all value converters and use Map. See #3763 for a similar case.

[DaanWasscher]

#3763 is about valueconversion in the mapping configuration. I use valueconversion inside ef core. Or do you see those as the same thing?

[lbargaoanu]

Pretty much, but he also used EF Core converters. It's the same situation and the same solution applies.