public static T Instance <T>(this MongoDBRef instance) where T : IEntity
{
if (instance == null || null == instance.Id || string.IsNullOrEmpty(instance.CollectionName))
{
return(default(T));
}
return(EntityOperationExtensions.DBFind <T>(instance.Id.ToString()));
}
public static T RefPick <T>(this List <MongoDBRef> lst, string id) where T : IEntity
{
if (lst == null)
{
return(default(T));
}
if (!lst.Exists(l => l.Id == id && l.CollectionName == typeof(T).DBCollectionName()))
{
return(default(T));
}
return(EntityOperationExtensions.DBFind <T>(id));
}
/// <summary>
/// 获取一个实例
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="where">查询表达式</param>
/// <returns></returns>
public static T Get <T>(Expression <Func <T, bool> > where) where T : IEntity
{
IsTypeCanBeUsed(typeof(T));
return(EntityOperationExtensions.DBFind <T>(where));
}
/// <summary>
/// 获取一个实例
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="id">id</param>
/// <returns></returns>
public static T Get <T>(string id) where T : IEntity
{
IsTypeCanBeUsed(typeof(T));
return(EntityOperationExtensions.DBFind <T>(id));
}