Question

I have 2 classes

List

@DatabaseTable(tableName = "loginsList")
public class LoginsList {

    @DatabaseField(columnName = "loginListID", generatedId = true)
    private int loginListID;
    @DatabaseField(columnName = "listName")
    private String listName;
    @DatabaseField(columnName = "listDescription")
    private String listDescription;
    @DatabaseField(columnName = "current")
    private boolean current;
    @DatabaseField(columnName = "sent")
    private boolean sent;

Login

@DatabaseTable(tableName = "login")
public class Login {
    @DatabaseField(columnName = "loginID", generatedId = true)
    private int loginID;
    @DatabaseField(columnName = "user", foreign=true)
    private User user;
    @DatabaseField(columnName = "loggedIn")
    private boolean loggedIn;
    @DatabaseField(columnName = "loginTime")
    private long loginTime;
    @DatabaseField(columnName = "logoutTime")
    private long logoutTime;
    @DatabaseField(columnName = "loginsList", foreign = true)
    private LoginsList loginsList;

I use ORMLite for the database. I want to know how can I get all logins for a list? I tried like this

tempLoginList = loginDao.queryForEq("loginsList", list);

where list is of type LoginsList and it is the list I want to get all the logins for, but it doesn’t work. How to do it with query builder?

Answer 1

tempLoginList = loginDao.queryForEq("loginsList", list);

That should work fine. Here’s a couple things to check for that may be getting in the way.

• ORMLite stores an int in Login which is the loginListID field from the LoginsList. When you associate a list with a Login, it must already have been created in the database so its id has already been generated.

• If you look at your query logs (turn on logging with something like the following log4j properties, you should see the associated query. You should be able to see the login id field being queried for. You need to make sure that it is correct.

  log4j.logger.com.j256.ormlite=DEBUG
  # to enable logging of arguments to all of the SQL calls
  # uncomment the following lines
  log4j.logger.com.j256.ormlite.stmt.mapped.BaseMappedStatement=TRACE
  #log4j.logger.com.j256.ormlite.stmt.mapped.MappedCreate=TRACE
  #log4j.logger.com.j256.ormlite.stmt.StatementExecutor=TRACE
  

I have a lot of unit tests but not specifically around dao.queryForEq(...) and foreign fields. I just added them to the code base and they work fine. Here’s my log output which might help:

[DEBUG] BaseMappedStatement insert data with statement 'INSERT INTO `foo` (`val` ,`equal` ,`null` ) VALUES (?,?,?)' and 3 args, changed 1 rows
[TRACE] BaseMappedStatement insert arguments: [1231231, 0, null]
[DEBUG] BaseMappedStatement assigned id '1' from keyholder to 'id' in Foo object
[DEBUG] BaseMappedStatement insert data with statement 'INSERT INTO `foreign` (`foo_id` ) VALUES (?)' and 1 args, changed 1 rows
[TRACE] BaseMappedStatement insert arguments: [1]
[DEBUG] BaseMappedStatement assigned id '1' from keyholder to 'id' in Foreign object
[DEBUG] StatementBuilder built statement SELECT * FROM `foreign` WHERE `foo_id` = 1 
[DEBUG] BaseMappedStatement prepared statement 'SELECT * FROM `foreign` WHERE `foo_id` = 1 ' with 0 args
[DEBUG] SelectIterator starting iterator @1781793025 for 'SELECT * FROM `foreign` WHERE `foo_id` = 1 '
[DEBUG] SelectIterator closed iterator @1781793025 after 1 rows
[DEBUG] StatementExecutor query of 'SELECT * FROM `foreign` WHERE `foo_id` = 1 ' returned 1 results