OrmLite delete failed

Question

I am performing a simple delete of a ormlite object. The code is below. But no matter what, the object never get deleted.

Dao<Subscription, Object> dao = helper.getSubscriptionDataDao();

dao = helper.getSubscriptionDataDao();
QueryBuilder<Subscription, Object> query = dao.queryBuilder();
query.where().eq("key", subKey);
Subscription sub = dao.queryForFirst(query.prepare());
int r = dao.delete(sub); // r is 1

Am I missing anything here?

Answer 1

This is how I solve the problem: Make sure the object have primary key. Setting the field as ID does not mean the ID will be auto generated. Without the ID, delete will fail.

Answer 2

You must create DeleteBuilder for Delete.QueryBuilder just for get Query for Select .

public int deleteByObjectId(int objectId) throws SQLException, java.sql.SQLException 
{
    DAL<T> helper= new DAL<T>(_context, type);
    RuntimeExceptionDao<T, Integer> dao =helper.getSimpleDataDao2();
    DeleteBuilder<T, Integer> delBuilder =dao.deleteBuilder();    
    delBuilder.where().eq("ObjId", objectId);
    PreparedDelete<T> prepareQery=delBuilder.prepare();
    int i=dao.delete(prepareQery);
    return i;
 }