/// <summary>
/// 向数据源中添加帖子。
/// </summary>
/// <param name="dataFacade">数据源的外观。</param>
/// <param name="indexEntity">帖子索引实体对象。</param>
/// <param name="contentEntity">帖子内容对象。</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="dataFacade"/>为null
/// 或
/// <paramref name="indexEntity"/>为null
/// 或
/// <paramref name="contentEntity"/>为null
/// </exception>
/// <exception cref="DataFacadeException">数据源抛出了未经处理的异常</exception>
public static async Task <int> AddPost(this IDataFacade dataFacade,
PostEntity indexEntity, PostContentEntity contentEntity)
{
if (dataFacade == null)
{
throw new ArgumentNullException(nameof(dataFacade));
}
if (indexEntity == null)
{
throw new ArgumentNullException(nameof(indexEntity));
}
if (contentEntity == null)
{
throw new ArgumentNullException(nameof(contentEntity));
}
// 将内容实体对象插入到数据源中。
await dataFacade.AddPostContentEntity(contentEntity);
// 将帖子索引实体对象插入到数据源中。
dataFacade.AddPostIndexEntity(indexEntity);
await dataFacade.CommitChanges();
return(indexEntity.Id);
}