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Updated Database (markdown)

litetex 2022-03-26 22:03:42 +01:00
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Database.md

@ -8,6 +8,12 @@ Basically, stream information is used for feeds, playlists and watch history.
![NewPipe's database structure](https://user-images.githubusercontent.com/17365767/141841352-eefcd324-abfe-480b-9626-17db21f6c9de.png)
<details><summary><i>How to update this diagram?</i></summary>
TODO: Add procedure here.
</details>
### Modifying the database structure
When modifying the database structure, the [database version needs to be increased](https://github.com/TeamNewPipe/NewPipe/blob/dev/app/src/main/java/org/schabi/newpipe/database/AppDatabase.java#L41).
You also need to create a migration to update the structure on installations which run an old database version. This is done in the [`Migrations`](https://github.com/TeamNewPipe/NewPipe/blob/dev/app/src/main/java/org/schabi/newpipe/database/Migrations.java) class. After creating the migration, it needs to be [registered with the database](https://github.com/TeamNewPipe/NewPipe/blob/dev/app/src/main/java/org/schabi/newpipe/NewPipeDatabase.java#L26) to be executed if necessary.