Connor Johnstone
26 lines
827 B
Rust
26 lines
827 B
Rust
use sea_orm_migration::prelude::*;
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#[derive(DeriveMigrationName)]
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pub struct Migration;
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#[async_trait::async_trait]
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impl MigrationTrait for Migration {
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async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
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let conn = manager.get_connection();
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conn.execute_unprepared(
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"DELETE FROM artists WHERE id NOT IN (
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SELECT DISTINCT artist_id FROM tracks WHERE artist_id IS NOT NULL
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UNION SELECT DISTINCT artist_id FROM wanted_items WHERE artist_id IS NOT NULL
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UNION SELECT DISTINCT artist_id FROM albums WHERE artist_id IS NOT NULL
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)",
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)
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.await?;
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Ok(())
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}
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async fn down(&self, _manager: &SchemaManager) -> Result<(), DbErr> {
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// Orphaned artists cannot be restored
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Ok(())
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}
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}
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