private static async Task ImportApp(DesignHub ctx, AppPackage pkg)
{
//TODO:暂重用更新逻辑简单实现
//先创建应用,必须添加到设计树内，因保存实体模型时获取表名需要用到
var appRootNode = ctx.DesignTree.AppRootNode;
var appNode = new ApplicationNode(ctx.DesignTree, pkg.Application);
appRootNode.Nodes.Add(appNode);
await ModelStore.CreateApplicationAsync(pkg.Application);
await UpdateApp(ctx, pkg, pkg.Application);
}