Tiobon.Web.Core/Tiobon.Core.Repository/BASE/BaseRepository.cs

using System.Data;
using System.Linq.Expressions;
using System.Reflection;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using SqlSugar;
using Tiobon.Core.Common;
using Tiobon.Core.Common.DB;
using Tiobon.Core.IRepository.Base;
using Tiobon.Core.Model;
using Tiobon.Core.Model.Models;
using Tiobon.Core.Model.Tenants;
using Tiobon.Core.Repository.UnitOfWorks;

namespace Tiobon.Core.Repository.Base
{
    public class BaseRepository<TEntity> : IBaseRepository<TEntity> where TEntity : class, new()
    {
        private readonly IUnitOfWorkManage _unitOfWorkManage;
        private readonly SqlSugarScope _dbBase;

        private ISqlSugarClient _db
        {
            get
            {
                ISqlSugarClient db = _dbBase;

                //修改使用 model备注字段作为切换数据库条件，使用sqlsugar TenantAttribute存放数据库ConnId
                //参考 https://www.donet5.com/Home/Doc?typeId=2246
                var tenantAttr = typeof(TEntity).GetCustomAttribute<TenantAttribute>();
                if (tenantAttr != null)
                {
                    //统一处理 configId 小写
                    db = _dbBase.GetConnectionScope(tenantAttr.configId.ToString().ToLower());
                    return db;
                }

                //多租户
                var mta = typeof(TEntity).GetCustomAttribute<MultiTenantAttribute>();
                if (mta is { TenantType: TenantTypeEnum.Db })
                {
                    //获取租户信息 租户信息可以提前缓存下来 
                    if (App.User is { TenantId: > 0 })
                    {
                        var tenant = db.Queryable<SysTenant>().WithCache().Where(s => s.Id == App.User.TenantId).First();
                        if (tenant != null)
                        {
                            var iTenant = db.AsTenant();
                            if (!iTenant.IsAnyConnection(tenant.ConfigId))
                            {
                                iTenant.AddConnection(tenant.GetConnectionConfig());
                            }

                            return iTenant.GetConnectionScope(tenant.ConfigId);
                        }
                    }
                }

                return db;
            }
        }

        public ISqlSugarClient Db => _db;

        public BaseRepository(IUnitOfWorkManage unitOfWorkManage)
        {
            _unitOfWorkManage = unitOfWorkManage;
            _dbBase = unitOfWorkManage.GetDbClient();
        }


        public async Task<TEntity> QueryById(object objId)
        {
            //return await Task.Run(() => _db.Queryable<TEntity>().InSingle(objId));
            return await _db.Queryable<TEntity>().In(objId).SingleAsync();
        }
        /// <summary>
        /// 查询实体数据是否存在
        /// </summary>
        /// <param name="objId"></param>
        /// <returns></returns>
        public async Task<bool> AnyAsync(object objId)
        {
            return await _db.Queryable<TEntity>().In(objId).AnyAsync();
        }

        /// <summary>
        /// 查询实体数据是否存在
        /// </summary>
        /// <param name="objId"></param>
        /// <returns></returns>
        public bool Any(object objId)
        {
            return _db.Queryable<TEntity>().In(objId).Any();
        }

        /// <summary>
        /// 根据ID查询一条数据
        /// </summary>
        /// <param name="objId">id（必须指定主键特性 [SugarColumn(IsPrimaryKey=true)]），如果是联合主键，请使用Where条件</param>
        /// <param name="blnUseCache">是否使用缓存</param>
        /// <returns>数据实体</returns>
        public async Task<TEntity> QueryById(object objId, bool blnUseCache = false)
        {
            //return await Task.Run(() => _db.Queryable<TEntity>().WithCacheIF(blnUseCache).InSingle(objId));
            return await _db.Queryable<TEntity>().WithCacheIF(blnUseCache, 10).In(objId).SingleAsync();
        }

        /// <summary>
        /// 根据ID查询数据
        /// </summary>
        /// <param name="lstIds">id列表（必须指定主键特性 [SugarColumn(IsPrimaryKey=true)]），如果是联合主键，请使用Where条件</param>
        /// <returns>数据实体列表</returns>
        public async Task<List<TEntity>> QueryByIDs(object[] lstIds)
        {
            //return await Task.Run(() => _db.Queryable<TEntity>().In(lstIds).ToList());
            return await _db.Queryable<TEntity>().In(lstIds).ToListAsync();
        }

        /// <summary>
        /// 写入实体数据
        /// </summary>
        /// <param name="entity">博文实体类</param>
        /// <returns></returns>
        public async Task<long> Add(TEntity entity)
        {
            //var i = await Task.Run(() => _db.Insertable(entity).ExecuteReturnBigIdentity());
            ////返回的i是long类型,这里你可以根据你的业务需要进行处理
            //return (int)i;

            var insert = _db.Insertable(entity);

            //这里你可以返回TEntity，这样的话就可以获取id值，无论主键是什么类型
            //var return3 = await insert.ExecuteReturnEntityAsync();

            return await insert.ExecuteReturnSnowflakeIdAsync();
        }

        /// <summary>
        /// 写入实体数据
        /// </summary>
        /// <param name="entity">实体类</param>
        /// <param name="insertColumns">指定只插入列</param>
        /// <returns>返回自增量列</returns>
        public async Task<long> Add(TEntity entity, Expression<Func<TEntity, object>> insertColumns = null)
        {
            var insert = _db.Insertable(entity);
            if (insertColumns == null)
            {
                return await insert.ExecuteReturnSnowflakeIdAsync();
            }
            else
            {
                return await insert.InsertColumns(insertColumns).ExecuteReturnSnowflakeIdAsync();
            }
        }

        /// <summary>
        /// 批量插入实体(速度快)
        /// </summary>
        /// <param name="listEntity">实体集合</param>
        /// <returns>影响行数</returns>
        public async Task<List<long>> Add(List<TEntity> listEntity)
        {
            return await _db.Insertable(listEntity.ToArray()).ExecuteReturnSnowflakeIdListAsync();
        }

        /// <summary>
        /// 更新实体数据
        /// </summary>
        /// <param name="entity">博文实体类</param>
        /// <returns></returns>
        public async Task<bool> Update(TEntity entity)
        {
            ////这种方式会以主键为条件
            //var i = await Task.Run(() => _db.Updateable(entity).ExecuteCommand());
            //return i > 0;
            //这种方式会以主键为条件
            return await _db.Updateable(entity).ExecuteCommandHasChangeAsync();
        }
        /// <summary>
        /// 更新实体数据
        /// </summary>
        /// <param name="entity">博文实体类</param>
        /// <returns></returns>
        public async Task<bool> Update(List<TEntity> entity)
        {
            return await _db.Updateable(entity).ExecuteCommandHasChangeAsync();
        }

        public async Task<bool> Update(TEntity entity, string where)
        {
            return await _db.Updateable(entity).Where(where).ExecuteCommandHasChangeAsync();
        }

        public async Task<bool> Update(string sql, SugarParameter[] parameters = null)
        {
            return await _db.Ado.ExecuteCommandAsync(sql, parameters) > 0;
        }

        public async Task<bool> Update(object operateAnonymousObjects)
        {
            return await _db.Updateable<TEntity>(operateAnonymousObjects).ExecuteCommandAsync() > 0;
        }

        public async Task<bool> Update(TEntity entity, List<string> lstColumns = null, List<string> lstIgnoreColumns = null, string where = "")
        {
            IUpdateable<TEntity> up = _db.Updateable(entity);
            if (lstIgnoreColumns != null && lstIgnoreColumns.Count > 0)
            {
                up = up.IgnoreColumns(lstIgnoreColumns.ToArray());
            }

            if (lstColumns != null && lstColumns.Count > 0)
            {
                up = up.UpdateColumns(lstColumns.ToArray());
            }

            if (!string.IsNullOrEmpty(where))
            {
                up = up.Where(where);
            }

            return await up.ExecuteCommandHasChangeAsync();
        }

        /// <summary>
        /// 根据实体删除一条数据
        /// </summary>
        /// <param name="entity">博文实体类</param>
        /// <returns></returns>
        public async Task<bool> Delete(TEntity entity)
        {
            return await _db.Deleteable(entity).ExecuteCommandHasChangeAsync();
        }

        /// <summary>
        /// 删除指定ID的数据
        /// </summary>
        /// <param name="id">主键ID</param>
        /// <returns></returns>
        public async Task<bool> DeleteById(object id)
        {
            return await _db.Deleteable<TEntity>().In(id).ExecuteCommandHasChangeAsync();
        }

        /// <summary>
        /// 删除指定ID集合的数据(批量删除)
        /// </summary>
        /// <param name="ids">主键ID集合</param>
        /// <returns></returns>
        public async Task<bool> DeleteByIds(object[] ids)
        {
            return await _db.Deleteable<TEntity>().In(ids).ExecuteCommandHasChangeAsync();
        }

        /// <summary>
        /// 根据表达式，删除实体
        /// </summary>
        /// <param name="id">主键ID</param>
        /// <returns></returns>
        public async Task<bool> Delete(Expression<Func<TEntity, bool>> whereExpression)
        {
            return await _db.Deleteable<TEntity>().Where(whereExpression).ExecuteCommandHasChangeAsync();
        }

        /// <summary>
        /// 查询所有数据
        /// </summary>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query()
        {
            return await _db.Queryable<TEntity>().ToListAsync();
        }

        /// <summary>
        /// 查询数据列表
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query(string where)
        {
            return await _db.Queryable<TEntity>().WhereIF(!string.IsNullOrEmpty(where), where).ToListAsync();
        }

        /// <summary>
        /// 查询数据列表
        /// </summary>
        /// <param name="whereExpression">whereExpression</param>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query(Expression<Func<TEntity, bool>> whereExpression)
        {
            return await _db.Queryable<TEntity>().WhereIF(whereExpression != null, whereExpression).ToListAsync();
        }

        /// <summary>
        /// 按照特定列查询数据列表
        /// </summary>
        /// <typeparam name="TResult"></typeparam>
        /// <param name="expression"></param>
        /// <returns></returns>
        public async Task<List<TResult>> Query<TResult>(Expression<Func<TEntity, TResult>> expression)
        {
            return await _db.Queryable<TEntity>().Select(expression).ToListAsync();
        }

        /// <summary>
        /// 按照特定列查询数据列表带条件排序
        /// </summary>
        /// <typeparam name="TResult"></typeparam>
        /// <param name="whereExpression">过滤条件</param>
        /// <param name="expression">查询实体条件</param>
        /// <param name="orderByFields">排序条件</param>
        /// <returns></returns>
        public async Task<List<TResult>> Query<TResult>(Expression<Func<TEntity, TResult>> expression, Expression<Func<TEntity, bool>> whereExpression, string orderByFields)
        {
            return await _db.Queryable<TEntity>().OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields).WhereIF(whereExpression != null, whereExpression).Select(expression).ToListAsync();
        }

        /// <summary>
        /// 查询一个列表
        /// </summary>
        /// <param name="whereExpression">条件表达式</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query(Expression<Func<TEntity, bool>> whereExpression, string orderByFields)
        {
            return await _db.Queryable<TEntity>().WhereIF(whereExpression != null, whereExpression).OrderByIF(orderByFields != null, orderByFields).ToListAsync();
        }

        /// <summary>
        /// 查询一个列表
        /// </summary>
        /// <param name="whereExpression"></param>
        /// <param name="orderByExpression"></param>
        /// <param name="isAsc"></param>
        /// <returns></returns>
        public async Task<List<TEntity>> Query(Expression<Func<TEntity, bool>> whereExpression, Expression<Func<TEntity, object>> orderByExpression, bool isAsc = true)
        {
            //return await Task.Run(() => _db.Queryable<TEntity>().OrderByIF(orderByExpression != null, orderByExpression, isAsc ? OrderByType.Asc : OrderByType.Desc).WhereIF(whereExpression != null, whereExpression).ToList());
            return await _db.Queryable<TEntity>().OrderByIF(orderByExpression != null, orderByExpression, isAsc ? OrderByType.Asc : OrderByType.Desc).WhereIF(whereExpression != null, whereExpression).ToListAsync();
        }

        /// <summary>
        /// 查询一个列表
        /// </summary>
        /// <param name="where">条件</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query(string where, string orderByFields)
        {
            return await _db.Queryable<TEntity>().OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields).WhereIF(!string.IsNullOrEmpty(where), where).ToListAsync();
        }


        /// <summary>
        /// 查询前N条数据
        /// </summary>
        /// <param name="whereExpression">条件表达式</param>
        /// <param name="top">前N条</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query(
            Expression<Func<TEntity, bool>> whereExpression,
            int top,
            string orderByFields)
        {
            return await _db.Queryable<TEntity>().OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields).WhereIF(whereExpression != null, whereExpression).Take(top).ToListAsync();
        }

        /// <summary>
        /// 查询前N条数据
        /// </summary>
        /// <param name="where">条件</param>
        /// <param name="top">前N条</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query(
            string where,
            int top,
            string orderByFields)
        {
            return await _db.Queryable<TEntity>().OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields).WhereIF(!string.IsNullOrEmpty(where), where).Take(top).ToListAsync();
        }

        /// <summary>
        /// 根据sql语句查询
        /// </summary>
        /// <param name="sql">完整的sql语句</param>
        /// <param name="parameters">参数</param>
        /// <returns>泛型集合</returns>
        public async Task<List<TEntity>> QuerySql(string sql, SugarParameter[] parameters = null)
        {
            return await _db.Ado.SqlQueryAsync<TEntity>(sql, parameters);
        }

        /// <summary>
        /// 根据sql语句查询
        /// </summary>
        /// <param name="sql">完整的sql语句</param>
        /// <param name="parameters">参数</param>
        /// <returns>DataTable</returns>
        public async Task<DataTable> QueryTable(string sql, SugarParameter[] parameters = null)
        {
            return await _db.Ado.GetDataTableAsync(sql, parameters);
        }

        /// <summary>
        /// </summary>
        /// <param name="whereExpression">条件表达式</param>
        /// <param name="pageIndex">页码（下标0）</param>
        /// <param name="pageSize">页大小</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query(
            Expression<Func<TEntity, bool>> whereExpression,
            int pageIndex,
            int pageSize,
            string orderByFields)
        {
            return await _db.Queryable<TEntity>().OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields)
                .WhereIF(whereExpression != null, whereExpression).ToPageListAsync(pageIndex, pageSize);
        }

        /// <summary>
        /// 分页查询
        /// </summary>
        /// <param name="where">条件</param>
        /// <param name="pageIndex">页码（下标0）</param>
        /// <param name="pageSize">页大小</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns>数据列表</returns>
        public async Task<List<TEntity>> Query(
            string where,
            int pageIndex,
            int pageSize,
            string orderByFields)
        {
            return await _db.Queryable<TEntity>().OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields)
                .WhereIF(!string.IsNullOrEmpty(where), where).ToPageListAsync(pageIndex, pageSize);
        }


        /// <summary>
        /// 分页查询[使用版本，其他分页未测试]
        /// </summary>
        /// <param name="whereExpression">条件表达式</param>
        /// <param name="pageIndex">页码（下标0）</param>
        /// <param name="pageSize">页大小</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns></returns>
        public async Task<PageModel<TEntity>> QueryPage(Expression<Func<TEntity, bool>> whereExpression, int pageIndex = 1, int pageSize = 20, string orderByFields = null)
        {
            RefAsync<int> totalCount = 0;
            var list = await _db.Queryable<TEntity>()
                .OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields)
                .WhereIF(whereExpression != null, whereExpression)
                .ToPageListAsync(pageIndex, pageSize, totalCount);

            return new PageModel<TEntity>(pageIndex, totalCount, pageSize, list);
        }
        /// <summary>
        /// 分页查询[使用版本，其他分页未测试]
        /// </summary>
        /// <param name="whereExpression">条件表达式</param>
        /// <param name="pageIndex">页码（下标0）</param>
        /// <param name="pageSize">页大小</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns></returns>
        public async Task<ServicePageResult<TEntity>> QueryFilterPage(QueryBody filter)
        {
            RefAsync<int> totalCount = 0;
            var query = _db.Queryable<TEntity>();

            string conditions = "1=1";
            if (filter.jsonParam != null)
                foreach (JProperty jProperty in filter.jsonParam.Properties())
                {
                    var name = jProperty.Name;
                    var value = jProperty.Value.ToString();
                    if (!string.IsNullOrWhiteSpace(value))
                    {
                        var jsonParam = JsonConvert.DeserializeObject<JsonParam>(value);

                        switch (jsonParam.operationKey)
                        {
                            case "Include":
                                conditions += $" AND {name} LIKE '%{jsonParam.columnValue}%'";
                                break;
                            case "NotInclude":
                                conditions += $" AND {name} NOT LIKE '%{jsonParam.columnValue}%'";
                                break;
                            case "IsNull":
                                conditions += $" AND {name} IS NULL";
                                break;
                            case "NotNull":
                                conditions += $" AND {name} IS NOT NULL";
                                break;
                            case "Equal":
                                conditions += $" AND {name} ='{jsonParam.columnValue}'";
                                break;
                            case "NotEqual":
                                conditions += $" AND {name} !='{jsonParam.columnValue}'";
                                break;
                            default:
                                break;
                        }
                    }
                }
            if (filter.pageSize == 0)
                filter.pageSize = 10000;
            query = query.Where(conditions);
            var list = await query
                .OrderByIF(!string.IsNullOrEmpty(filter.Sorting), filter.Sorting)
                .ToPageListAsync(filter.pageNum, filter.pageSize, totalCount);

            return new ServicePageResult<TEntity>(filter.pageNum, totalCount, filter.pageSize, list);
        }


        /// <summary> 
        ///查询-多表查询
        /// </summary> 
        /// <typeparam name="T">实体1</typeparam> 
        /// <typeparam name="T2">实体2</typeparam> 
        /// <typeparam name="T3">实体3</typeparam>
        /// <typeparam name="TResult">返回对象</typeparam>
        /// <param name="joinExpression">关联表达式 (join1,join2) => new object[] {JoinType.Left,join1.UserNo==join2.UserNo}</param> 
        /// <param name="selectExpression">返回表达式 (s1, s2) => new { Id =s1.UserNo, Id1 = s2.UserNo}</param>
        /// <param name="whereLambda">查询表达式 (w1, w2) =>w1.UserNo == "")</param> 
        /// <returns>值</returns>
        public async Task<List<TResult>> QueryMuch<T, T2, T3, TResult>(
            Expression<Func<T, T2, T3, object[]>> joinExpression,
            Expression<Func<T, T2, T3, TResult>> selectExpression,
            Expression<Func<T, T2, T3, bool>> whereLambda = null) where T : class, new()
        {
            if (whereLambda == null)
            {
                return await _db.Queryable(joinExpression).Select(selectExpression).ToListAsync();
            }

            return await _db.Queryable(joinExpression).Where(whereLambda).Select(selectExpression).ToListAsync();
        }


        /// <summary>
        /// 两表联合查询-分页
        /// </summary>
        /// <typeparam name="T">实体1</typeparam>
        /// <typeparam name="T2">实体1</typeparam>
        /// <typeparam name="TResult">返回对象</typeparam>
        /// <param name="joinExpression">关联表达式</param>
        /// <param name="selectExpression">返回表达式</param>
        /// <param name="whereExpression">查询表达式</param>
        /// <param name="pageIndex">页码</param>
        /// <param name="pageSize">页大小</param>
        /// <param name="orderByFields">排序字段</param>
        /// <returns></returns>
        public async Task<PageModel<TResult>> QueryTabsPage<T, T2, TResult>(
            Expression<Func<T, T2, object[]>> joinExpression,
            Expression<Func<T, T2, TResult>> selectExpression,
            Expression<Func<TResult, bool>> whereExpression,
            int pageIndex = 1,
            int pageSize = 20,
            string orderByFields = null)
        {
            RefAsync<int> totalCount = 0;
            var list = await _db.Queryable<T, T2>(joinExpression)
                .Select(selectExpression)
                .OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields)
                .WhereIF(whereExpression != null, whereExpression)
                .ToPageListAsync(pageIndex, pageSize, totalCount);
            return new PageModel<TResult>(pageIndex, totalCount, pageSize, list);
        }

        /// <summary>
        /// 两表联合查询-分页-分组
        /// </summary>
        /// <typeparam name="T">实体1</typeparam>
        /// <typeparam name="T2">实体1</typeparam>
        /// <typeparam name="TResult">返回对象</typeparam>
        /// <param name="joinExpression">关联表达式</param>
        /// <param name="selectExpression">返回表达式</param>
        /// <param name="whereExpression">查询表达式</param>
        /// <param name="groupExpression">group表达式</param>
        /// <param name="pageIndex">页码</param>
        /// <param name="pageSize">页大小</param>
        /// <param name="orderByFields">排序字段</param>
        /// <returns></returns>
        public async Task<PageModel<TResult>> QueryTabsPage<T, T2, TResult>(
            Expression<Func<T, T2, object[]>> joinExpression,
            Expression<Func<T, T2, TResult>> selectExpression,
            Expression<Func<TResult, bool>> whereExpression,
            Expression<Func<T, object>> groupExpression,
            int pageIndex = 1,
            int pageSize = 20,
            string orderByFields = null)
        {
            RefAsync<int> totalCount = 0;
            var list = await _db.Queryable<T, T2>(joinExpression).GroupBy(groupExpression)
                .Select(selectExpression)
                .OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields)
                .WhereIF(whereExpression != null, whereExpression)
                .ToPageListAsync(pageIndex, pageSize, totalCount);
            return new PageModel<TResult>(pageIndex, totalCount, pageSize, list);
        }

        //var exp = Expressionable.Create<ProjectToUser>()
        //        .And(s => s.tdIsDelete != true)
        //        .And(p => p.IsDeleted != true)
        //        .And(p => p.pmId != null)
        //        .AndIF(!string.IsNullOrEmpty(model.paramCode1), (s) => s.uID == model.paramCode1.ObjToInt())
        //                .AndIF(!string.IsNullOrEmpty(model.searchText), (s) => (s.groupName != null && s.groupName.Contains(model.searchText))
        //                        || (s.jobName != null && s.jobName.Contains(model.searchText))
        //                        || (s.uRealName != null && s.uRealName.Contains(model.searchText)))
        //                .ToExpression();//拼接表达式
        //var data = await _projectMemberServices.QueryTabsPage<sysUserInfo, ProjectMember, ProjectToUser>(
        //    (s, p) => new object[] { JoinType.Left, s.uID == p.uId },
        //    (s, p) => new ProjectToUser
        //    {
        //        uID = s.uID,
        //        uRealName = s.uRealName,
        //        groupName = s.groupName,
        //        jobName = s.jobName
        //    }, exp, s => new { s.uID, s.uRealName, s.groupName, s.jobName }, model.currentPage, model.pageSize, model.orderField + " " + model.orderType);

        #region Split分表基础接口 （基础CRUD）

        /// <summary>
        /// 分页查询[使用版本，其他分页未测试]
        /// </summary>
        /// <param name="whereExpression">条件表达式</param>
        /// <param name="pageIndex">页码（下标0）</param>
        /// <param name="pageSize">页大小</param>
        /// <param name="orderByFields">排序字段，如name asc,age desc</param>
        /// <returns></returns>
        public async Task<PageModel<TEntity>> QueryPageSplit(Expression<Func<TEntity, bool>> whereExpression, DateTime beginTime, DateTime endTime, int pageIndex = 1, int pageSize = 20, string orderByFields = null)
        {
            RefAsync<int> totalCount = 0;
            var list = await _db.Queryable<TEntity>().SplitTable(beginTime, endTime)
                .OrderByIF(!string.IsNullOrEmpty(orderByFields), orderByFields)
                .WhereIF(whereExpression != null, whereExpression)
                .ToPageListAsync(pageIndex, pageSize, totalCount);
            var data = new PageModel<TEntity>(pageIndex, totalCount, pageSize, list);
            return data;
        }

        /// <summary>
        /// 写入实体数据
        /// </summary>
        /// <param name="entity">数据实体</param>
        /// <returns></returns>
        public async Task<List<long>> AddSplit(TEntity entity)
        {
            var insert = _db.Insertable(entity).SplitTable();
            //插入并返回雪花ID并且自动赋值ID　
            return await insert.ExecuteReturnSnowflakeIdListAsync();
        }

        /// <summary>
        /// 更新实体数据
        /// </summary>
        /// <param name="entity">数据实体</param>
        /// <returns></returns>
        public async Task<bool> UpdateSplit(TEntity entity, DateTime dateTime)
        {
            //直接根据实体集合更新 （全自动 找表更新）
            //return await _db.Updateable(entity).SplitTable().ExecuteCommandAsync();//,SplitTable不能少

            //精准找单个表
            var tableName = _db.SplitHelper<TEntity>().GetTableName(dateTime); //根据时间获取表名
            return await _db.Updateable(entity).AS(tableName).ExecuteCommandHasChangeAsync();
        }

        /// <summary>
        /// 删除数据
        /// </summary>
        /// <param name="entity"></param>
        /// <param name="dateTime"></param>
        /// <returns></returns>
        public async Task<bool> DeleteSplit(TEntity entity, DateTime dateTime)
        {
            ////直接根据实体集合删除 （全自动 找表插入）,返回受影响数
            //return await _db.Deleteable(entity).SplitTable().ExecuteCommandAsync();//,SplitTable不能少

            //精准找单个表
            var tableName = _db.SplitHelper<TEntity>().GetTableName(dateTime); //根据时间获取表名
            return await _db.Deleteable<TEntity>().AS(tableName).Where(entity).ExecuteCommandHasChangeAsync();
        }

        /// <summary>
        /// 根据ID查找数据
        /// </summary>
        /// <param name="objId"></param>
        /// <returns></returns>
        public async Task<TEntity> QueryByIdSplit(object objId)
        {
            return await _db.Queryable<TEntity>().In(objId).SplitTable(tabs => tabs).SingleAsync();
        }

        /// <summary>
        /// 数据过滤用的查询表达式构建
        /// </summary>
        /// <typeparam name="TEntity"></typeparam>
        /// <returns></returns>
        protected Expression<Func<TEntity, bool>> CreateFilterExpression<TEntity>()
            where TEntity : class
        {
            Expression<Func<TEntity, bool>> expression = null;

            //if (typeof(ISoftDelete).IsAssignableFrom(typeof(TEntity)))
            //{
            //    Expression<Func<TEntity, bool>> softDeleteFilter = e => !((ISoftDelete)e).IsDeleted;
            //    expression = expression == null ? softDeleteFilter : CombineExpressions(expression, softDeleteFilter);
            //}

            if (typeof(IMayHaveTenant).IsAssignableFrom(typeof(TEntity)))// && IsMayHaveTenantFilterEnabled)
            {
                Expression<Func<TEntity, bool>> mayHaveTenantFilter =
                    e => ((IMayHaveTenant)e).IsEnable == 1;
                expression = expression == null
                    ? mayHaveTenantFilter
                    : CombineExpressions(expression, mayHaveTenantFilter);
            }

            return expression;
        }
        protected Expression<Func<T, bool>> CombineExpressions<T>(
            Expression<Func<T, bool>> expression1, Expression<Func<T, bool>> expression2)
        {
            return Common.Helper.ExpressionCombiner.Combine(expression1, expression2);
        }

        #endregion
    }

    public interface IMayHaveTenant
    {
        int IsEnable { get; set; }
    }
}