src/02_Data/Data.Abstractions/Queryable/Grouping/IGroupingQueryable2.cs

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using System;
using System.Linq.Expressions;
using Mkh.Data.Abstractions.Entities;

namespace Mkh.Data.Abstractions.Queryable.Grouping;

/// <summary>
/// 分组查询对象
/// </summary>
public interface IGroupingQueryable<TKey, TEntity, TEntity2> : IGroupingQueryable where TEntity : IEntity, new() where TEntity2 : IEntity, new()
{
    /// <summary>
    /// 聚合过滤
    /// </summary>
    /// <param name="expression"></param>
    /// <returns></returns>
    IGroupingQueryable<TKey, TEntity, TEntity2> Having(Expression<Func<IGrouping<TKey, TEntity, TEntity2>, bool>> expression);

    /// <summary>
    /// 聚合过滤
    /// </summary>
    /// <param name="havingSql">SQL语句</param>
    /// <returns></returns>
    IGroupingQueryable<TKey, TEntity, TEntity2> Having(string havingSql);

    /// <summary>
    /// 排序
    /// </summary>
    /// <param name="field">排序字段名称</param>
    /// <returns></returns>
    IGroupingQueryable<TKey, TEntity, TEntity2> OrderBy(string field);

    /// <summary>
    /// 排序
    /// </summary>
    /// <param name="field">排序字段名称</param>
    /// <returns></returns>
    IGroupingQueryable<TKey, TEntity, TEntity2> OrderByDescending(string field);

    /// <summary>
    /// 排序
    /// </summary>
    /// <param name="expression"></param>
    /// <returns></returns>
    IGroupingQueryable<TKey, TEntity, TEntity2> OrderBy<TResult>(Expression<Func<IGrouping<TKey, TEntity, TEntity2>, TResult>> expression);

    /// <summary>
    /// 倒序排序
    /// </summary>
    /// <param name="expression"></param>
    /// <returns></returns>
    IGroupingQueryable<TKey, TEntity, TEntity2> OrderByDescending<TResult>(Expression<Func<IGrouping<TKey, TEntity, TEntity2>, TResult>> expression);

    /// <summary>
    /// 查询列
    /// </summary>
    /// <typeparam name="TResult"></typeparam>
    /// <param name="expression"></param>
    /// <returns></returns>
    IGroupingQueryable<TKey, TEntity, TEntity2> Select<TResult>(Expression<Func<IGrouping<TKey, TEntity, TEntity2>, TResult>> expression);