OrmLite removal failed

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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?


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.