Mapping from different source types to same target type (different, not multiple concurrent sources)

[AllanMichaelsen]

Say I have a class that is mapping from an EF Core Entity, but I also want to have an alternate route to the same target.

From:

public partial class UnitEntity : ModifiedByBaseEntity

or

public partial class UnitDto : FacetsModifiedByBaseDto;

To:

[Facet(typeof(UnitDto),
    Include =
    [
        nameof(UnitEntity.Name)
    ])]
public partial class UnitDropDownDto : FacetsModifiedByBaseDto;

[Facet(typeof(UnitEntity),
    Include =
    [
        nameof(UnitEntity.Name)
    ])]
public partial class UnitDropDownDto : FacetsModifiedByBaseDto;

I could make a manual partial class and add the constructor for it and all the needed projection and such, but that would take away from the idea of automation and would make it cumbersome if changing the target class.

Is there a way to have multiple paths of mapping to the same target?

[kwpbartecautoid]

I think this is the same as I raised in #232
I did try and progress this myself but I'm not so good with working with generators, so I didn't get very far!

[AllanMichaelsen]

I think this is the same as I raised in #232 I did try and progress this myself but I'm not so good with working with generators, so I didn't get very far!

I'm not sure it's the same. I have two different entry routes to the same Dto.

1. UnitDto -> UnitDropDownDto
2. UnitEntity -> UnitDropDownDto

I'm not trying to create one Dto from multiple simultaneous sources, I'm trying to map from different sources to one target at different steps in the code.

[kwpbartecautoid]

I think this is the same as I raised in #232 I did try and progress this myself but I'm not so good with working with generators, so I didn't get very far!

I'm not sure it's the same. I have two different entry routes to the same Dto.

1. UnitDto -> UnitDropDownDto
2. UnitEntity -> UnitDropDownDto

I'm not trying to create one Dto from multiple simultaneous sources, I'm trying to map from different sources to one target at different steps in the code.

Exactly - That's what I was trying to describe. My use case was not a merge into a single Facet but two sources that can be facetted into the same target. I think you have described it more clearly with better examples.

[Tim-Maes]

I'll take a stab at it later this week. Facet is becoming quiet complex now and the codebase is cluttered with comments so I can keep track of whats happening. Might look at a refactor soon to keep maintainability.

In the meantime, lets see what copilot can come up with :)

[Tim-Maes]

Looks like copilot did it. I'll pull & test these changes later today

[Tim-Maes]

@AllanMichaelsen @kwpbartecautoid Feel free to check out the PR and provide feedback