Show all root albums instead of the single path

Improve sql connection error messages

api/database/mysql.go

@@ -25,6 +25,10 @@ func SetupDatabase() *sql.DB {
 		log.Fatalf("Could not parse mysql url: %s\n", err)
 	}
 
+	if address.String() == "" {
+		log.Fatalln("ERROR: Environment variable MYSQL_URL missing, exiting")
+	}
+
 	queryValues := address.Query()
 	queryValues.Add("multiStatements", "true")
 	queryValues.Add("parseTime", "true")

api/example.env

@@ -1,6 +1,6 @@
 # Copy this file to .env
 
-MYSQL_URL=user:password@/dbname
+MYSQL_URL=user:password@tcp(localhost)/dbname
 
 API_ENDPOINT=http://localhost:4001/
 API_LISTEN_PORT=4001

api/graphql/resolvers/album.go

@@ -20,7 +20,11 @@ func (r *queryResolver) MyAlbums(ctx context.Context, filter *models.Filter) ([]
 		return nil, err
 	}
 
-	rows, err := r.Database.Query("SELECT * FROM album WHERE owner_id = ? AND parent_album IS NULL"+filterSQL, user.UserID)
+	rows, err := r.Database.Query(`
+		SELECT * FROM album WHERE owner_id = ? AND parent_album = (
+			SELECT album_id FROM album WHERE parent_album IS NULL
+		)
+	`+filterSQL, user.UserID)
 	if err != nil {
 		return nil, err
 	}