Android活躍Select查詢

Question

new Select("id") 
.From(customer) 
.where("lastName=?","John") 
.execute(); 

錯誤

E/CursorWindow: Failed to read row 0, column -1 from a CursorWindow which has 1 rows, 1 columns. 

主要查詢（請從客戶id其中的lastName = 「約翰」）

Answer 1

嘗試

List<Customer> results = new Select().from(Customer.class).where("lastName=?","John").execute(); 

if(results.size() > 0) { 
    long id = results.get(0).getId(); 
}