背景

通過(guò)多個(gè)部門id獲取所有用戶，部門和用戶是多對(duì)多。

已知部門id，獲取該部門包括該部門下的所有子部門的所有用戶。

關(guān)系如下：

public class Entity:IEntity{public Guid Id { get; set; }public string CreateUser { get; set; }public DateTime CreateTime { get; set; }public string ModifyUser { get; set; }public DateTime? ModifyTime { get; set; }1701270254public Byte[] RowVersion { get; set; }} //組織架構(gòu) public class WMS_Org : Entity{public WMS_Org() { }public string OrgName { get; set; }public string OrgDesc { get; set; }public int OrgOrder { get; set; }public string OrgFatherId { get; set; }public virtual ICollection<WMS_OrgUser> OrgUserIds { get; set; }} //用戶public class WMS_User : Entity{public WMS_User() { }public string UserName { get; set; }public string NickName { get; set; }public string UserPwd { get; set; }public string Sex { get; set; }public string Phone { get; set; }public string Email { get; set; }public string QQ { get; set; }public string Address { get; set; }public string Remark { get; set; }public virtual ICollection<WMS_OrgUser> UserOrgIds { get; set; }} //組織架構(gòu)和用戶的關(guān)聯(lián) public class WMS_OrgUser : Entity{public WMS_OrgUser() { }public Guid OrgId { get; set; }[ForeignKey("OrgId")]public virtual WMS_Org Org { get; set; }public Guid UserId { get; set; }[ForeignKey("UserId")]public virtual WMS_User User { get; set; }}

已知組織的id

如上圖，我單擊0100組織架構(gòu)，要獲取該組織架構(gòu)下的所有用戶，首先由于用戶是掛載到每個(gè)節(jié)點(diǎn)上的，所有需要事先遍歷獲取所有的子節(jié)點(diǎn)獲取節(jié)點(diǎn)的id

放到Guid[]數(shù)組里

提交后臺(tái)查詢

//DBSET=DbSet<WMS_User>，ids=Guid[] ids參數(shù) //第一種方式All DBSET.Where(p => p.UserOrgIds.All(o=>ids.Contains(o.OrgId)));//第二種方式Any DBSET.Where(p => p.UserOrgIds.Any(o=>ids.Contains(o.OrgId)));

注意EF采用Contains構(gòu)造in的sql語(yǔ)句

很直觀的可以看出兩個(gè)區(qū)別，一個(gè)是All，一個(gè)Any，那么產(chǎn)生的sql有什么區(qū)別呢？

//All，EF產(chǎn)生的是inner Join SELECT [Extent1].[Id] AS [Id], [Extent1].[UserName] AS [UserName], [Extent1].[NickName] AS [NickName], [Extent1].[UserPwd] AS [UserPwd], [Extent1].[Sex] AS [Sex], [Extent1].[Phone] AS [Phone], [Extent1].[Email] AS [Email], [Extent1].[QQ] AS [QQ], [Extent1].[Address] AS [Address], [Extent1].[Remark] AS [Remark], [Extent1].[Disable] AS [Disable], [Extent1].[CreateUser] AS [CreateUser], [Extent1].[CreateTime] AS [CreateTime], [Extent1].[ModifyUser] AS [ModifyUser], [Extent1].[ModifyTime] AS [ModifyTime], [Extent1].[RowVersion] AS [RowVersion] FROM [dbo].[WMS_User] AS [Extent1] WHERE NOT EXISTS ( SELECT 1 AS [C1] FROM [dbo].[WMS_OrgUser] AS [Extent2] WHERE ([Extent1].[Id] = [Extent2].[UserId]) AND ( ( NOT ( [Extent2].[OrgId] IN (CAST('4e108b91-be3c-4cf4-a074-3767b9b8c7dc' AS UNIQUEIDENTIFIER), CAST('1cc15f8c-3758-47d3-862a-5287ab5d0651' AS UNIQUEIDENTIFIER), CAST('e1bf6f5a-800a-4fd4-9309-576c1d84ba2f' AS UNIQUEIDENTIFIER), CAST('a436b8a9-4b3a-4bf9-bbdd-839571e03915' AS UNIQUEIDENTIFIER), CAST('b0d6aead-e72f-4fd5-b2cd-e575454d3a4c' AS UNIQUEIDENTIFIER)) ) ) OR ( CASE WHEN ( [Extent2].[OrgId] IN ( CAST('4e108b91-be3c-4cf4-a074-3767b9b8c7dc' AS UNIQUEIDENTIFIER), CAST('1cc15f8c-3758-47d3-862a-5287ab5d0651' AS UNIQUEIDENTIFIER), CAST('e1bf6f5a-800a-4fd4-9309-576c1d84ba2f' AS UNIQUEIDENTIFIER), CAST('a436b8a9-4b3a-4bf9-bbdd-839571e03915' AS UNIQUEIDENTIFIER), CAST('b0d6aead-e72f-4fd5-b2cd-e575454d3a4c' AS UNIQUEIDENTIFIER)) ) THEN CAST(1 AS BIT) WHEN ( NOT ( [Extent2].[OrgId] IN ( CAST('4e108b91-be3c-4cf4-a074-3767b9b8c7dc' AS UNIQUEIDENTIFIER), CAST('1cc15f8c-3758-47d3-862a-5287ab5d0651' AS UNIQUEIDENTIFIER), CAST('e1bf6f5a-800a-4fd4-9309-576c1d84ba2f' AS UNIQUEIDENTIFIER), CAST('a436b8a9-4b3a-4bf9-bbdd-839571e03915' AS UNIQUEIDENTIFIER), CAST('b0d6aead-e72f-4fd5-b2cd-e575454d3a4c' AS UNIQUEIDENTIFIER)) ) ) THEN CAST(0 AS BIT) END IS NULL ) ) ) //Any方式,EF生成的Exists SELECT [Extent1].[Id] AS [Id], [Extent1].[UserName] AS [UserName], [Extent1].[NickName] AS [NickName], [Extent1].[UserPwd] AS [UserPwd], [Extent1].[Sex] AS [Sex], [Extent1].[Phone] AS [Phone], [Extent1].[Email] AS [Email], [Extent1].[QQ] AS [QQ], [Extent1].[Address] AS [Address], [Extent1].[Remark] AS [Remark], [Extent1].[CreateUser] AS [CreateUser], [Extent1].[CreateTime] AS [CreateTime], [Extent1].[ModifyUser] AS [ModifyUser], [Extent1].[ModifyTime] AS [ModifyTime], [Extent1].[RowVersion] AS [RowVersion] FROM [dbo].[WMS_User] AS [Extent1] WHERE EXISTS (SELECT 1 AS [C1]FROM [dbo].[WMS_OrgUser] AS [Extent2]WHERE ([Extent1].[Id] = [Extent2].[UserId]) AND ([Extent2].[OrgId] IN (cast('bd3c010c-476f-45e6-8d83-ad741cc55309' as uniqueidentifier),cast('4e108b91-be3c-4cf4-a074-3767b9b8c7dc' as uniqueidentifier),cast('1cc15f8c-3758-47d3-862a-5287ab5d0651' as uniqueidentifier),cast('e1bf6f5a-800a-4fd4-9309-576c1d84ba2f' as uniqueidentifier),cast('a436b8a9-4b3a-4bf9-bbdd-839571e03915' as uniqueidentifier),cast('b0d6aead-e72f-4fd5-b2cd-e575454d3a4c' as uniqueidentifier),cast('79ddb55a-1587-4928-a312-58da0c091459' as uniqueidentifier),cast('618de87e-2d97-4c0a-b6c1-acd072c305e2' as uniqueidentifier))) )

也就是說(shuō)All是包括條件和不在條件之內(nèi)的任何值，而Any是嚴(yán)格在條件之內(nèi)的值，但其實(shí)我們想要的是Inner Join的方式，相當(dāng)于是懶加載方式，那么需要加上Include，也就是

IQueryable<WMS_OrgUser> test5 = _db.wmsOrgUser.Include("User").Where(p => ids.Contains(p.OrgId)); SELECT 1 AS [C1], [Extent1].[Id] AS [Id], [Extent1].[OrgId] AS [OrgId], [Extent1].[UserId] AS [UserId], [Extent1].[CreateUser] AS [CreateUser], [Extent1].[CreateTime] AS [CreateTime], [Extent1].[ModifyUser] AS [ModifyUser], [Extent1].[ModifyTime] AS [ModifyTime], [Extent1].[RowVersion] AS [RowVersion], [Extent2].[Id] AS [Id1], [Extent2].[UserName] AS [UserName], [Extent2].[NickName] AS [NickName], [Extent2].[UserPwd] AS [UserPwd], [Extent2].[Sex] AS [Sex], [Extent2].[Phone] AS [Phone], [Extent2].[Email] AS [Email], [Extent2].[QQ] AS [QQ], [Extent2].[Address] AS [Address], [Extent2].[Remark] AS [Remark], [Extent2].[Disable] AS [Disable], [Extent2].[CreateUser] AS [CreateUser1], [Extent2].[CreateTime] AS [CreateTime1], [Extent2].[ModifyUser] AS [ModifyUser1], [Extent2].[ModifyTime] AS [ModifyTime1], [Extent2].[RowVersion] AS [RowVersion1] FROM [dbo].[WMS_OrgUser] AS [Extent1] INNER JOIN [dbo].[WMS_User] AS [Extent2] ON [Extent1].[UserId] = [Extent2].[Id] WHERE [Extent1].[OrgId] IN (cast('4e108b91-be3c-4cf4-a074-3767b9b8c7dc' as uniqueidentifier),cast('1cc15f8c-3758-47d3-862a-5287ab5d0651' as uniqueidentifier),cast('e1bf6f5a-800a-4fd4-9309-576c1d84ba2f' as uniqueidentifier),cast('a436b8a9-4b3a-4bf9-bbdd-839571e03915' as uniqueidentifier),cast('b0d6aead-e72f-4fd5-b2cd-e575454d3a4c' as uniqueidentifier) )

　　

條件關(guān)聯(lián)查詢，并實(shí)現(xiàn)分頁(yè)

var list = dal.FindByPage(start, pageSize, u => u.OrderByDescending(c => c.CreateTime), u => u.UserOrgIds.All(o => ids.Contains(o.OrgId)), out total);//防止轉(zhuǎn)json時(shí)候嵌套異常var result = from f in listselect new{Id = f.Id,UserName = f.UserName,Address = f.Address,Email = f.Email,Sex = f.Sex,CreateUser = f.CreateUser,CreateTime = f.CreateTime,NickName = f.NickName,Phone = f.Phone,QQ = f.QQ,Remark = f.Remark,UserPwd = f.UserPwd};return result;

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public virtual IEnumerable<T> FindByPage(int startIndex, int pageSize, Func<IQueryable<T>, IOrderedQueryable<T>> order, Expression<Func<T, bool>> filters, out int Total){try{IQueryable<T> rs = order(DBSET.Where(filters));Total = rs.Count();if (startIndex < 0 || pageSize < 1){return null;// rs.ToList(); }else{return rs.Skip(startIndex * pageSize).Take(pageSize).ToList();}}catch (Exception e){Total = 0;log.Error("FindByPage:" + order.ToString() + " " + filters.ToString() + " " + e.Message);return null;}}

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