I m designing the app model not necessarily the ` Entity` ie kotlinlang #android

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Title

b

Bruno_

03/28/2020, 3:21 PM

I'm designing the app model (not necessarily the

@Entity

-ies) with the help of the room docs. The thing is that in

one-to-many

scenario the parent knows nothing about the children plus every child has only an ID of the parent. However I absolutely have to have an

Ad

as well as the list of application results (not just ids, whole objects) in

AdEntry

. Is it possible to do so in Room?

every example I've seen out there have just primitives (I mean string, int etc) in the

@Entity

One solution would be to separate my

model

classess (diagram) from the actual

@Entity

-ies and just convert stuff on the go, but I would have to make a couple of additional database calls so this approach isn't very scalable

if it comes to the app architecture, it looks like this: (still working on it tho, it's not complete and may contain some bugs)

also I can't just annotate stuff with

@Embedded

as I need these things to be in separate tables

uhh so thanks to this blog now I know that I can just use

@Relation

in case of

AdEntry -- ApplicationResult

relation, still don't know what about the

AdEntry -- Ad

in other words, I want

Ad

to be embedded but in a separate table

j

jean pokou

03/29/2020, 7:46 PM

I think you need to create a table Ad like you diagram shows.

I mean at the end of the day Room is just a ORM so it does convert to SQLite and its impossible to include a table as a row in a relational db. There is a concept of virtual table in SQLite but its different from table. It behaves like View

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