Nested mapping with array as a source about automapper-plus HOT 4 CLOSED

Hey, are you in control of how your source data looks? The $source data doesn't resemble the structure of the parent-child relation you are trying to map. This makes the mapping a bit difficult. I'd expect the input data to look like this:

$source = [
    "id" => 1,
    'child' => ["name" => "Super name"]
];

This way you could just define your mapping like this:

$config = new AutoMapperConfig();
$config->registerMapping(DataType::ARRAY, ChildClass::class);
$config->registerMapping(DataType::ARRAY, ParentClass::class)
    ->forMember('child', Operation::mapTo(ChildClass::class, true));

(You need the true in your mapTo, see the comment just below here in the docs).

So if you can change the source structure, that would be the easiest solution. Otherwise you can try the following config. This is assuming your child class has a setter for the name property, or maybe a constructor:

$config->registerMapping(DataType::ARRAY, ParentClass::class)
    ->forMember('child', function ($source) {
        // Just manually map the name string to an instance of the child class.
        $child = new ChildClass();
        $child->setName($source['name']);
        return $child;
    });

If your child class doesn't provide any way to set the private name property, you can abuse the fact that the mapper has no problems with setting private properties. The mapper itself is passed as the second parameter of the mapping function, so you could construct an array and map that, basically recreating the first solution on the fly. Something like this:

$config->registerMapping(DataType::ARRAY, ParentClass::class)
    ->forMember('child', function ($source, AutoMapperInterface $mapper) {
        $child = ['name' => $source['name']];
        return $mapper->map($child, ChildClass::class);
    });

Let me know if this helped you, or if you have any other problems!

from automapper-plus.

That's an amazing explanation. I was thinking about these ways and you are right that they are perfectly valid and my example is too unintuitive.
Thank you again for the explanation!

from automapper-plus.

@mark-gerarts Sorry for bump this old issue. For the solution above it is great for mapping a new object for the destination class.

How about mapping an existing entity object to destination class?

$source = [
    'child' => ["id" => "1"]
];

$config->registerMapping(DataType::ARRAY, ParentClass::class)
    ->forMember('child', function ($source) {
         // fetch entity from doctrine by "id" and return the child?
        return $child;
    });

from automapper-plus.

No problem! You should be able to just fetch your entity from the repository where you indicate it. Unless I'm missing something, then please explain the issue some more.

The code could look something like this:

$config->registerMapping(DataType::ARRAY, ParentClass::class)
    ->forMember('child', function ($source) use ($repository) {
        return $repository->find($source['child']['id']);
    });

from automapper-plus.