ORMLite错误不存在数据库字段注释

Question

当我运行 Android 应用程序时出现此错误：

没有字段具有 DatabaseField 类中的注释 [[Lmodel.Vak;

我的 Vak 类有注释，所以我真的不明白为什么它仍然给我这个错误。

package model;
import com.j256.ormlite.field.DatabaseField;
import com.j256.ormlite.table.DatabaseTable;
@DatabaseTable(tableName = "vak")
public class Vak {
    @DatabaseField(generatedId = true, columnName = "vakID", id=true) Long id;
    @DatabaseField int rij;
    @DatabaseField
    int kolom;
...
}

我有一个名为 Databasehelper.java 的文件，其中扩展了 OrmLiteSqLiteOpenHelper，该文件如下所示：

public class DatabaseHelper extends OrmLiteSqliteOpenHelper {
// name of the database file for your application -- change to something
// appropriate for your app
private static final String DATABASE_NAME = "project56.db";
// any time you make changes to your database objects, you may have to
// increase the database version
private static final int DATABASE_VERSION = 1;

private DatabaseType databaseType = new SqliteAndroidDatabaseType();

// the DAO object we use to access the tables
private Dao<Vleugel, Long> vleugelDao = null;
private Dao<Verdieping, Long> verdiepingDao = null;
private Dao<NavigatiePunt, Long> navigatiePuntDao = null;
private Dao<Lokaal, Long> lokaalDao = null;
private Dao<Raster, Long> rasterDao = null;
private Dao<Vak, Long> vakDao = null;
private Dao<Graaf, Long> graafDao = null;
private Dao<Vertex, Long> vertexDao = null;
private Dao<Edge, Long> edgeDao = null;

public DatabaseHelper(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}

/**
 * This is called when the database is first created. Usually you should
 * call createTable statements here to create the tables that will store
 * your data.
 */
@Override
public void onCreate(SQLiteDatabase db, ConnectionSource connectionSource) {
    try {
        Log.i(DatabaseHelper.class.getName(), "onCreate");
        TableUtils.createTable(connectionSource, Vleugel.class);
        TableUtils.createTable(connectionSource, Verdieping.class);
        TableUtils.createTable(connectionSource, NavigatiePunt.class);
        TableUtils.createTable(connectionSource, Lokaal.class);
        TableUtils.createTable(connectionSource, Raster.class);
        TableUtils.createTable(connectionSource, Vak.class);
        TableUtils.createTable(connectionSource, Graaf.class);
        TableUtils.createTable(connectionSource, Vertex.class);
        TableUtils.createTable(connectionSource, Edge.class);

    } catch (SQLException e) {
        Log.e(DatabaseHelper.class.getName(), "Can't create database", e);
        throw new RuntimeException(e);
    }
}

/**
 * This is called when your application is upgraded and it has a higher
 * version number. This allows you to adjust the various data to match the
 * new version number.
 */
@Override
public void onUpgrade(SQLiteDatabase db, ConnectionSource connectionSource,
        int oldVersion, int newVersion) {
    try {
        Log.i(DatabaseHelper.class.getName(), "onUpgrade");
        TableUtils.dropTable(connectionSource, Vleugel.class, true);
        TableUtils.dropTable(connectionSource, Verdieping.class, true);
        TableUtils.dropTable(connectionSource, NavigatiePunt.class, true);
        TableUtils.dropTable(connectionSource, Lokaal.class, true);
        TableUtils.dropTable(connectionSource, Raster.class, true);
        TableUtils.dropTable(connectionSource, Vak.class, true);
        TableUtils.dropTable(connectionSource, Graaf.class, true);
        TableUtils.dropTable(connectionSource, Vertex.class, true);
        TableUtils.dropTable(connectionSource, Edge.class, true);

        // after we drop the old databases, we create the new ones
        onCreate(db, connectionSource);
    } catch (SQLException e) {
        Log.e(DatabaseHelper.class.getName(), "Can't drop databases", e);
        throw new RuntimeException(e);
    }
}

/**
 * Returns the Database Access Object (DAO) for the classes It will create
 * it or just give the cached value.
 */
public Dao<Vleugel, Long> getVleugelDao() throws SQLException {
    if (vleugelDao == null) {
        vleugelDao = getDao(Vleugel.class);
    }
    return vleugelDao;
}

public Dao<Verdieping, Long> getVerdiepingDao() throws SQLException {
    if (verdiepingDao == null) {
        verdiepingDao = getDao(Verdieping.class);
    }
    return verdiepingDao;
}

public Dao<NavigatiePunt, Long> getNavigatiePuntDao() throws SQLException {
    if (navigatiePuntDao == null) {
        navigatiePuntDao = getDao(NavigatiePunt.class);
    }
    return navigatiePuntDao;
}

public Dao<Lokaal, Long> getLokaalDao() throws SQLException {
    if (lokaalDao == null) {
        lokaalDao = getDao(Lokaal.class);
    }
    return lokaalDao;
}

public Dao<Raster, Long> getRasterDao() throws SQLException {
    if (rasterDao == null) {
        rasterDao = getDao(Raster.class);
    }
    return rasterDao;
}

public Dao<Vak, Long> getVakDao() throws SQLException {
    if (vakDao == null) {
        vakDao = getDao(Vak.class);
    }
    return vakDao;
}

public Dao<Graaf, Long> getGraafDao() throws SQLException {
    if (graafDao == null) {
        graafDao = getDao(Graaf.class);
    }
    return graafDao;
}

public Dao<Vertex, Long> getVertexDao() throws SQLException {
    if (vertexDao == null) {
        vertexDao = getDao(Vertex.class);
    }
    return vertexDao;
}

public Dao<Edge, Long> getEdgeDao() throws SQLException {
    if (edgeDao == null) {
        edgeDao = getDao(Edge.class);
    }
    return edgeDao;
}

/**
 * Close the database connections and clear any cached DAOs.
 */
@Override
public void close() {
    super.close();
    vleugelDao = null;
    verdiepingDao = null;
    navigatiePuntDao = null;
    lokaalDao = null;
    rasterDao = null;
    vakDao = null;
    graafDao = null;
    vertexDao = null;
    edgeDao = null;
}
}

我还有一个扩展 OrmLiteBaseActivity 的文件控制器：

public class Controller extends OrmLiteBaseActivity<DatabaseHelper> {

Dao<Vleugel, Long> vleugelDao;
Dao<Verdieping, Long> verdiepingDao;
Dao<NavigatiePunt, Long> navigatiePuntDao;
Dao<Lokaal, Long> lokaalDao;
Dao<Raster, Long> rasterDao;
Dao<Graaf, Long> graafDao;
Dao<Vertex, Long> vertexDao;
Dao<Edge, Long> edgeDao;
Dao<Vak, Long> vakDao;

// Databasehelper is benodigd voor ORMLite
static {
    OpenHelperManager.setOpenHelperFactory(new SqliteOpenHelperFactory() {
        public OrmLiteSqliteOpenHelper getHelper(Context context) {
            return new DatabaseHelper(context);
        }
    });
}

public Controller() throws SQLException {
    /** initialiseren van dao */
    vleugelDao = getHelper().getVleugelDao();
    verdiepingDao = getHelper().getVerdiepingDao();
    navigatiePuntDao = getHelper().getNavigatiePuntDao();
    lokaalDao = getHelper().getLokaalDao();
    rasterDao = getHelper().getRasterDao();
    graafDao = getHelper().getGraafDao();
    vertexDao = getHelper().getVertexDao();
    edgeDao = getHelper().getEdgeDao();
    vakDao = getHelper().getVakDao();
}

/**
 * Haalt vleugel idNaam op uit dao object bijv. K1
 * 
 * @return Vleugel
 * @throws java.sql.SQLException
 */

public Vleugel getVleugel(String vleugelIDNaam)
        throws java.sql.SQLException {
    // select * from vleugel where idNaam='{vleugelIDNaam}'
    QueryBuilder<Vleugel, Long> qb = vleugelDao.queryBuilder();
    Where where = qb.where();
    // the name field must be equal to "foo"
    where.eq("idNaam", vleugelIDNaam);
    PreparedQuery<Vleugel> preparedQuery = qb.prepare();
    List<Vleugel> vleugelList = vleugelDao.query(preparedQuery);
    Log.v("Getvleugel", vleugelList.size() + "");
    if (vleugelList.size() == 1) {
        return vleugelList.get(0);
    }
    return null;
}

public Verdieping getVerdieping(int nummer) throws java.sql.SQLException {
    // TODO: Met querybuilder query naar db om verdieping te pakken
    return null;
}

/**
 * Haalt navigatiepunt op
 * 
 * @param naam
 * @return
 * @throws java.sql.SQLException
 */
public NavigatiePunt getNavigatiePunt(String naam)
        throws java.sql.SQLException {
    // select * from navigatiepunt where naam='{naam}'
    QueryBuilder<NavigatiePunt, Long> qb = navigatiePuntDao.queryBuilder();
    Where where = qb.where();
    where.eq("naam", naam);
    PreparedQuery<NavigatiePunt> preparedQuery = qb.prepare();
    List<NavigatiePunt> navigatieList = navigatiePuntDao
            .query(preparedQuery);
    Log.v("GetLokaal", navigatieList.size() + "");
    if (navigatieList.size() == 1) {
        return navigatieList.get(0);
    }
    return null;
}

/**
 * Get lokaal object op basis van lokaalcode
 * 
 * @param lokaalcode
 * @return
 * @throws java.sql.SQLException
 */
public Lokaal getLokaal(String lokaalcode) throws java.sql.SQLException {
    // select * from lokaal where lokaalcode='{lokaalcode}'
    QueryBuilder<Lokaal, Long> qb = lokaalDao.queryBuilder();
    Where where = qb.where();
    where.eq("lokaalcode", lokaalcode);
    PreparedQuery<Lokaal> preparedQuery = qb.prepare();
    List<Lokaal> lokaalList = lokaalDao.query(preparedQuery);
    Log.v("GetLokaal", lokaalList.size() + "");
    if (lokaalList.size() == 1) {
        return lokaalList.get(0);
    }
    return null;
}
}

那么您对此有什么建议吗？我应该检查什么？

Answer 1

提供解决方案可能已经晚了，但这是我的解决方案：
你会看到 proguard 试图混淆代码，如果你深入阅读 proguard 或简介

http://proguard.sourceforge.net/FAQ.html

what Shrinking in proguard -> Shrinking programs such as ProGuard can analyze bytecode and remove unused classes, fields, and methods.
so from this we can presume that it is removing your objects since it's not used by anywhere...

so wt you probably need?
you need to stop proguard from shirking that methods or objects from process
so this is the line for that..:
-keep class com.j256.**<br>
-keepclassmembers class com.j256.** { *; }<br>
-keep enum com.j256.**<br>
-keepclassmembers enum com.j256.** { *; }<br>
-keep interface com.j256.**<br>
-keepclassmembers interface com.j256.** { *; }

this line will keep proguard from removing my public methods and variables..

-keepclassmembers class classpath.** {
public *;
}

you need to write column name for atlest id... because it will search for it and will proguard change it's name... so you need to define column name id for primary key..

Answer 2

事实证明，这是 ORMLite 中围绕外来对象循环的一个错误，该错误已在 4.22 版本中修复。 ORMLite 没有正确处理 A 有一个外部字段 B 有一个外部字段给 C，而 C 有一个外部字段返回 A 的情况。

http://ormlite.com/releases/

请直接给我发一些邮件@Yanny 如果这有效或无效'不起作用，我会相应地调整这个答案。

Answer 3

您能检查一下您的数据库中是否创建了表 Vak 吗？缺少此表可能是导致此崩溃的原因。