/// <summary>
/// 异步根据条件查询数量
/// </summary>
/// <typeparam name="T">映射类型</typeparam>
/// <param name="repository">仓储类</param>
/// <param name="predicate">Lambda表达式</param>
/// <returns></returns>
public static Task <int> CountAsync <T>(this IRepository <T> repository, Expression <Func <T, bool> > predicate)
where T : class
{
Guard.ArgumentNotNull(predicate, nameof(predicate));
var filter = LambdaQueryParser.Where(predicate);
return(repository.CountAsync(filter));
}
/// <summary>
/// 根据条件查询
/// </summary>
/// <typeparam name="T">映射类型</typeparam>
/// <param name="repository">仓储类</param>
/// <param name="predicate">Lambda表达式</param>
/// <returns></returns>
public static IEnumerable <T> Query <T>(this IRepository <T> repository, Expression <Func <T, bool> > predicate)
where T : class
{
Guard.ArgumentNotNull(predicate, nameof(predicate));
var filter = LambdaQueryParser.Where(predicate);
return(repository.Query(filter));
}
/// <summary>
/// 异步根据条件分页
/// </summary>
/// <typeparam name="T">映射类型</typeparam>
/// <param name="repository">仓储类</param>
/// <param name="pageIndex">页码</param>
/// <param name="pageSize">每页条数</param>
/// <param name="predicate">Lambda表达式</param>
/// <param name="sortOptions">排序配置</param>
/// <returns></returns>
public static Task <IEnumerable <T> > QueryPageAsync <T>(this IRepository <T> repository, int pageIndex, int pageSize,
Expression <Func <T, bool> > predicate, SortOptions sortOptions = null)
where T : class
{
Guard.ArgumentNotNull(predicate, nameof(predicate));
var filter = LambdaQueryParser.Where(predicate);
return(repository.QueryPageAsync(pageIndex, pageSize, filter, sortOptions));
}