Add songCount column to Artist table

db/migration/20200508093059_add_artist_song_count.go

@@ -0,0 +1,27 @@
+package migration
+
+import (
+	"database/sql"
+
+	"github.com/pressly/goose"
+)
+
+func init() {
+	goose.AddMigration(Up20200508093059, Down20200508093059)
+}
+
+func Up20200508093059(tx *sql.Tx) error {
+	_, err := tx.Exec(`
+alter table artist
+	add song_count integer default 0 not null;
+`)
+	if err != nil {
+		return err
+	}
+	notice(tx, "A full rescan will be performed to calculate artists' song counts")
+	return forceFullRescan(tx)
+}
+
+func Down20200508093059(tx *sql.Tx) error {
+	return nil
+}