Question

我为我的SQLite Db进行了DbFlow迁移。我添加了两列，构建成功问题是我无法在User表中的任何位置看到这些列，并且我无法插入或读取它们中的数据。可能是什么问题？

我的迁移代码。

package com.omnitech.elunda.mobile.database;

import com.raizlabs.android.dbflow.annotation.Database;
import com.raizlabs.android.dbflow.annotation.Migration;
import com.raizlabs.android.dbflow.sql.SQLiteType;
import com.raizlabs.android.dbflow.sql.migration.AlterTableMigration;

/**
 * Created by magicwand on 9/28/2017.
 * Database class to manage datastore
 */

@Database(name=ELundaDatabase.name , version=ELundaDatabase.VERSION)
public class ELundaDatabase {

    public static final String name ="ElundaDatabase";
    public static final int VERSION =1;

    @Migration(version = ELundaDatabase.VERSION +1, database=ELundaDatabase.class)
    public static class Migration1 extends AlterTableMigration<User> {


        public Migration1(Class<User> table) {
            super(table);
        }

        @Override
        public void onPreMigrate() {
            super.onPreMigrate();
            addColumn(SQLiteType.TEXT, "phoneNumber");
            addColumn(SQLiteType.TEXT, "password");
        }
    }



}

Answer 1

将数据库版本升级为可更改版本。在模型中使用相同的名称，否则使用列名注释

public static final String name ="ElundaDatabase";
public static final int VERSION = 2;


@Migration(version = 2, database=ELundaDatabase.class)
public static class Migration1 extends AlterTableMigration<User> {


    public Migration1(Class<User> table) {
        super(table);
    }

    @Override
    public void onPreMigrate() {
        super.onPreMigrate();
        addColumn(SQLiteType.TEXT, "phoneNumber");
        addColumn(SQLiteType.TEXT, "password");
    }
}

/// Model例如

@Column(name = "time_sent")
long timeSent;

无法看到Android DBFLOW迁移后的列

1 个答案: