I have a very complex set of relationships of a bu...

# exposed

[dave08]

I have a very complex set of relationships of a bunch of tables, and from table A, I want to be able to access A.B.C.D.name... it'd be a pity to have to create an entity for each one, load them all and traverse them all just to access that field's value...

[tapac]

Is there one-to-one relation between tables?
Do you need only read access?

[dave08]

They're all linked through foreign keys, and I need read, and preferrably write only if all the entities between exist... I wouldn't need that field to be initialized in new { } though.

[dave08]

It's a type of virtual field I'm looking for to be able to simplify my domain's model.

[tapac]

DAO supports updates only on the Entity table, but for read you can override dependsOnTable and dependsOnColumns in EnityClass:

override val dependsOnTables = ItemTable innerJoin CategoriesTable
override val dependsOnColumns = ItemTable.columns + CategoriesTable.name

Then just delegate to CategoriesTable.name:

val categoryName: String by CategoriesTable.name

[dave08]

That's already not bad! Just wondering why we need to let it know the dependencies if we already declare them in the Table, can't they be inferred? -- but this is probably liveable, until a ksp plugin to generate all the biolerplate code could be made...

[dave08]

--- Also, if there's already a join, would it be so hard to allow write access to it?