feat: render local artist images with no foreign key

server/db/migrations.go

@@ -37,6 +37,8 @@ func (db *DB) Migrate(ctx MigrationContext) error {
 		construct(ctx, "202102191448", migratePodcastAutoDownload),
 		construct(ctx, "202110041330", migrateAlbumCreatedAt),
 		construct(ctx, "202111021951", migrateAlbumRootDir),
+		construct(ctx, "202201042236", migrateArtistGuessedFolder),
+		construct(ctx, "202202092013", migrateArtistCover),
 	}
 
 	return gormigrate.
@@ -306,3 +308,28 @@ func migrateAlbumRootDir(tx *gorm.DB, ctx MigrationContext) error {
 	}
 	return nil
 }
+
+func migrateArtistGuessedFolder(tx *gorm.DB, ctx MigrationContext) error {
+	return tx.AutoMigrate(Artist{}).Error
+}
+
+func migrateArtistCover(tx *gorm.DB, ctx MigrationContext) error {
+	step := tx.AutoMigrate(
+		Artist{},
+	)
+	if err := step.Error; err != nil {
+		return fmt.Errorf("step auto migrate: %w", err)
+	}
+
+	if !tx.Dialect().HasColumn("artists", "guessed_folder_id") {
+		return nil
+	}
+
+	step = tx.Exec(`
+		ALTER TABLE artists DROP COLUMN guessed_folder_id
+	`)
+	if err := step.Error; err != nil {
+		return fmt.Errorf("step drop column: %w", err)
+	}
+	return nil
+}

server/db/model.go

@@ -48,6 +48,7 @@ type Artist struct {
 	NameUDec   string   `sql:"default: null"`
 	Albums     []*Album `gorm:"foreignkey:TagArtistID"`
 	AlbumCount int      `sql:"-"`
+	Cover      string   `sql:"default: null"`
 }
 
 func (a *Artist) SID() *specid.ID {