/// <summary>
/// 分页查询
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="where">查询表达式</param>
/// <param name="orderby">排序</param>
/// <param name="pageIndex">页码</param>
/// <param name="pageSize">单页容量</param>
/// <param name="pageCount">总页数</param>
/// <param name="allCount">总条目数</param>
/// <returns></returns>
public static IQueryable <T> Select <T>(Expression <Func <T, bool> > where, Expression <Func <T, object> > orderby, int pageIndex, int pageSize, out int pageCount, out int allCount) where T : IEntity
{
pageCount = 0;
allCount = 0;
IsTypeCanBeUsed(typeof(T));
return(EntityOperationExtensions.DBSelect <T>(where, orderby, pageIndex, pageSize, out pageCount, out allCount));
}
public static List <T> RefPick <T>(this List <MongoDBRef> lst) where T : IEntity
{
if (lst == null)
{
return(new List <T>());
}
var ids = lst.Where(i => i.CollectionName == typeof(T).DBCollectionName()).Select(i => i.Id).ToArray();
return(EntityOperationExtensions.DBSelect <T>(i => ids.Contains(i.Id)).ToList());
}
public static bool RefExists <T>(this List <MongoDBRef> lst, Expression <Func <T, bool> > where) where T : IEntity
{
if (lst == null)
{
return(false);
}
var ids = lst.Where(i => i.CollectionName == typeof(T).DBCollectionName()).Select(i => i.Id).ToArray();
if (ids.Length == 0)
{
return(false);
}
return(EntityOperationExtensions.DBSelect <T>(i => ids.Contains(i.Id)).All(where));
}
/// <summary>
/// 查询
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="where">查询表达式</param>
/// <returns></returns>
public static IQueryable <T> Select <T>(Expression <Func <T, bool> > where) where T : IEntity
{
IsTypeCanBeUsed(typeof(T));
return(EntityOperationExtensions.DBSelect <T>(where));
}