android - 如何使用 Ollie 进行模式迁移？

Question

我目前在我的 Android 应用程序中使用 Ollie ORM。我想做一些架构迁移。

如果我查看 this ，我得出结论，我应该创建一个新类。我创建了如下迁移类:

import ollie.Migration; 

public class MigrateToVersionTwo extends Migration {
    @Override
    public int getVersion() {
        return 2;
    }

   @Override
    public String[] getStatements() {
        return new String[]{
                "ALTER TABLE events ADD COLUMN test INTEGER;"
        };
    }
}

我还将 database_version 从 1 更改为 2。

但是架构没有任何变化..我是不是遗漏了什么？

如果您需要更多信息，这里是 AdapterHolderImpl.java 类:

package ollie;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import ollie.adapter.BooleanAdapter;
import ollie.adapter.CalendarAdapter;
import ollie.adapter.SqlDateAdapter;
import ollie.adapter.UtilDateAdapter;
import ollie.internal.AdapterHolder;
import ollie.internal.ModelAdapter;

public final class AdapterHolderImpl
    implements AdapterHolder {
    private static final List<Migration> MIGRATIONS = new ArrayList<Migration>();
    private static final Map<Class<? extends Model>, ModelAdapter> MODEL_ADAPTERS = new HashMap<Class<? extends Model>, ModelAdapter>();
    private static final Map<Class, TypeAdapter> TYPE_ADAPTERS = new HashMap<Class, TypeAdapter>();

    static {
        MODEL_ADAPTERS.put(com.me.model.SafeZoneVO.class, new ollie.SafeZoneVO$$ModelAdapter());
        MODEL_ADAPTERS.put(com.me.model.EventVO.class, new ollie.EventVO$$ModelAdapter());
        MODEL_ADAPTERS.put(com.me.model.ContactVO.class, new ollie.ContactVO$$ModelAdapter());
        MODEL_ADAPTERS.put(com.me.model.User.class, new ollie.User$$ModelAdapter());
        MODEL_ADAPTERS.put(com.me.model.Place.class, new ollie.Place$$ModelAdapter());

        TYPE_ADAPTERS.put(java.util.Calendar.class, new CalendarAdapter());
        TYPE_ADAPTERS.put(java.util.Date.class, new UtilDateAdapter());
        TYPE_ADAPTERS.put(java.lang.Boolean.class, new BooleanAdapter());
        TYPE_ADAPTERS.put(java.sql.Date.class, new SqlDateAdapter());
    }

    public final List<? extends Migration> getMigrations() {
        return MIGRATIONS;
    }

    public final <T extends Model> ModelAdapter<T> getModelAdapter(Class<? extends Model> cls) {
        return MODEL_ADAPTERS.get(cls);
    }

    public final List<? extends ModelAdapter> getModelAdapters() {
        return new ArrayList(MODEL_ADAPTERS.values());
    }

    public final <D, S> TypeAdapter<D, S> getTypeAdapter(Class<D> cls) {
        return TYPE_ADAPTERS.get(cls);
    }
}

Answer 1

原来我得用最新的版本(目前是0.3.2-SNAPSHOT)。

因此，我将构建 gradle 更改为:

apt 'com.michaelpardo:ollie-compiler:0.3.2-SNAPSHOT'
compile 'com.michaelpardo:ollie:0.3.2-SNAPSHOT'

并为快照版本添加了存储库:

maven { url "https://oss.sonatype.org/content/repositories/snapshots/"}