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Add section about projection modification after loading.

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Gerrit Meier
2022-10-14 11:05:39 +02:00
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src/main/asciidoc/object-mapping/projections.adoc
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@@ -62,6 +62,14 @@ the projection logic will not follow those cycles but only create cycle-free que
Multi-level projections are bounded to the entities they should project.
`RelationshipProperties` fall into the category of entities in this case and needs to get respected if projections get applied.
[[projections.sdn.manipulation]]
== Data manipulation of projections
If you have fetched the projection as a DTO, you can modify its values.
But in case you are using the interface-based projection, you cannot just update the interface.
A typical pattern that can be used is to provide a method in your domain entity class that consumes the interface and creates a domain entity with the copied values from the interface.
This way, you can then update the entity and persist it again with the projection blueprint/mask as described in the next section.
[[projections.sdn.persistence]]
== Persistence of projections