Add ThenMapper

Src/Asp.Net/SqlServerTest/SqlServerTest.csproj

@@ -100,6 +100,7 @@
     <Compile Include="UnitTest\Models\UserEntity.cs" />
     <Compile Include="UnitTest\Models\UserRoleEntity.cs" />
     <Compile Include="UnitTest\UCustom01.cs" />
+    <Compile Include="UnitTest\UCustom012.cs" />
     <Compile Include="UnitTest\UCustom09.cs" />
     <Compile Include="UnitTest\UCustom011.cs" />
     <Compile Include="UnitTest\UCustom02.cs" />

Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableContext.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SqlSugar 
+{
+    public class MapperContext<T>
+    {
+        public ISqlSugarClient context { get; set; }
+
+        public List<T> list { get; set; }
+        public Dictionary<string,object> TempChildLists { get; set; }
+    }
+}

Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs

@@ -1300,6 +1300,67 @@ namespace SqlSugar
             InitMapping();
             return _ToList<T>();
         }
+        public List<T> SetContext<ParameterT>(Expression<Func<T, object>> thisFiled, Expression<Func<object>> mappingFiled, ParameterT parameter) 
+        {
+            List<T> result = new List<T>();
+            var entity = this.Context.EntityMaintenance.GetEntityInfo<ParameterT>();
+            var queryableContext = this.Context.TempItems["Queryable_To_Context"] as MapperContext<ParameterT>;
+            var list = queryableContext.list;
+            var pkName = (((mappingFiled as LambdaExpression).Body as UnaryExpression).Operand as MemberExpression).Member.Name;
+            var key = thisFiled.ToString() +typeof(ParameterT).FullName + typeof(T).FullName;
+            var ids = list.Select(it => it.GetType().GetProperty(pkName).GetValue(it)).ToArray();
+            if (queryableContext.TempChildLists == null)
+                queryableContext.TempChildLists = new Dictionary<string, object>();
+            if (list != null &&  queryableContext.TempChildLists.ContainsKey(key))
+            {
+                result = (List<T>)queryableContext.TempChildLists[key];
+            }
+            else
+            {
+                if (queryableContext.TempChildLists == null)
+                    queryableContext.TempChildLists = new Dictionary<string, object>();
+                this.Context.Utilities.PageEach(ids, 200, pageIds =>
+                {
+                     result.AddRange(this.Clone().In(thisFiled, pageIds).ToList());
+                });
+                queryableContext.TempChildLists[key]= result;
+            }
+            var name = (((thisFiled as LambdaExpression).Body as UnaryExpression).Operand as MemberExpression).Member.Name;
+            var pkValue = parameter.GetType().GetProperty(pkName).GetValue(parameter);
+            result = result.Where(it => it.GetType().GetProperty(name).GetValue(it).ObjToString() == pkValue.ObjToString()).ToList();
+            return result;
+        }
+
+        public async Task<List<T>> SetContextAsync<ParameterT>(Expression<Func<T, object>> thisFiled, Expression<Func<object>> mappingFiled, ParameterT parameter)
+        {
+            List<T> result = new List<T>();
+            var entity = this.Context.EntityMaintenance.GetEntityInfo<ParameterT>();
+            var queryableContext = this.Context.TempItems["Queryable_To_Context"] as MapperContext<ParameterT>;
+            var list = queryableContext.list;
+            var pkName = (((mappingFiled as LambdaExpression).Body as UnaryExpression).Operand as MemberExpression).Member.Name;
+            var key = thisFiled.ToString() + typeof(ParameterT).FullName + typeof(T).FullName;
+            var ids = list.Select(it => it.GetType().GetProperty(pkName).GetValue(it)).ToArray();
+            if (queryableContext.TempChildLists == null)
+                queryableContext.TempChildLists = new Dictionary<string, object>();
+            if (list != null && queryableContext.TempChildLists.ContainsKey(key))
+            {
+                result = (List<T>)queryableContext.TempChildLists[key];
+            }
+            else
+            {
+                if (queryableContext.TempChildLists == null)
+                    queryableContext.TempChildLists = new Dictionary<string, object>();
+                await this.Context.Utilities.PageEachAsync(ids, 200, async pageIds =>
+                {
+                    result.AddRange(await this.Clone().In(thisFiled, pageIds).ToListAsync());
+                });
+                queryableContext.TempChildLists[key] = result;
+            }
+            var name = (((thisFiled as LambdaExpression).Body as UnaryExpression).Operand as MemberExpression).Member.Name;
+            var pkValue = parameter.GetType().GetProperty(pkName).GetValue(parameter);
+            result = result.Where(it => it.GetType().GetProperty(name).GetValue(it).ObjToString() == pkValue.ObjToString()).ToList();
+            return result;
+        }
         public virtual void ForEach(Action<T> action, int singleMaxReads = 300,System.Threading.CancellationTokenSource cancellationTokenSource = null) 
         {
             Check.Exception(this.QueryBuilder.Skip > 0 || this.QueryBuilder.Take > 0, ErrorMessage.GetThrowMessage("no support Skip take, use PageForEach", "不支持Skip Take,请使用 Queryale.PageForEach"));

Src/Asp.Net/SqlSugar/Abstract/SugarProvider/SqlSugarProvider.cs

@@ -1271,5 +1271,42 @@ namespace SqlSugar
             return new FastestProvider<T>(this);
         }
         #endregion
+
+        #region
+        public void ThenMapper<T>(IEnumerable<T> list, Action<T> action)
+        {
+            MapperContext<T> result = new MapperContext<T>();
+            result.context = this.Context;
+            if (result.context.TempItems == null)
+            {
+                result.context.TempItems = new Dictionary<string, object>();
+            }
+            var key = "Queryable_To_Context";
+            result.context.TempItems.Add(key, result);
+            result.list = list.ToList();
+            foreach (var item in list)
+            {
+                action.Invoke(item);
+            }
+            result.context.TempItems.Remove(key);
+        }
+        public async Task ThenMapperAsync<T>(IEnumerable<T> list, Func<T, Task> action)
+        {
+            MapperContext<T> result = new MapperContext<T>();
+            result.context = this.Context;
+            if (result.context.TempItems == null)
+            {
+                result.context.TempItems = new Dictionary<string, object>();
+            }
+            var key = "Queryable_To_Context";
+            result.context.TempItems.Add(key, result);
+            result.list = list.ToList();
+            foreach (var item in list)
+            {
+                await action.Invoke(item);
+            }
+            result.context.TempItems.Remove(key);
+        }
+        #endregion
     }
 }

Src/Asp.Net/SqlSugar/Interface/IQueryable.cs

@@ -132,7 +132,8 @@ namespace SqlSugar
         Task<TResult> AvgAsync<TResult>(Expression<Func<T, TResult>> expression);
 
         List<T> ToList();
-
+        List<T> SetContext<ParameterT>(Expression<Func<T,object>> thisFiled, Expression<Func<object>> mappingFiled, ParameterT parameter);
+        Task <List<T>> SetContextAsync<ParameterT>(Expression<Func<T, object>> thisFiled, Expression<Func<object>> mappingFiled, ParameterT parameter);
         Dictionary<string, object> ToDictionary(Expression<Func<T, object>> key, Expression<Func<T, object>> value);
         Task<Dictionary<string, object>> ToDictionaryAsync(Expression<Func<T, object>> key, Expression<Func<T, object>> value);
         List<Dictionary<string, object>> ToDictionaryList();

Src/Asp.Net/SqlSugar/Interface/ISqlSugarClient.cs

@@ -193,5 +193,10 @@ namespace SqlSugar
         IFastest<T> Fastest<T>() where T : class, new();
         #endregion
 
+        #region ThenMapper
+        void ThenMapper<T>(IEnumerable<T> list, Action<T> action);
+        Task ThenMapperAsync<T>(IEnumerable<T> list, Func<T,Task> action);
+        #endregion
+
     }
 }

Src/Asp.Net/SqlSugar/SqlSugar.csproj

@@ -101,6 +101,7 @@
     <Compile Include="Entities\SugarConnection.cs" />
     <Compile Include="ExpressionsToSql\Subquery\SubTemplate.cs" />
     <Compile Include="ExpressionsToSql\Subquery\SubqueryableN.cs" />
+    <Compile Include="Abstract\QueryableProvider\QueryableContext.cs" />
     <Compile Include="Infrastructure\StaticConfig.cs" />
     <Compile Include="Interface\IFastBuilder.cs" />
     <Compile Include="Interface\IFastest.cs" />

Src/Asp.Net/SqlSugar/SqlSugarClient.cs

@@ -25,6 +25,8 @@ namespace SqlSugar
         private MappingColumnList _MappingColumns;
         private IgnoreColumnList _IgnoreColumns;
         private IgnoreColumnList _IgnoreInsertColumns;
+
+
         internal Guid? AsyncId { get; set; }
         internal bool? IsSingleInstance { get; set; }
 
@@ -591,6 +593,17 @@ namespace SqlSugar
         }
         #endregion
 
+        #region ThenMapper
+        public void ThenMapper<T>(IEnumerable<T> list, Action<T> action)
+        {
+            this.Context.ThenMapper(list, action);
+        }
+        public  Task ThenMapperAsync<T>(IEnumerable<T> list, Func<T, Task> action)
+        {
+            return this.Context.ThenMapperAsync(list,action);
+        }
+        #endregion
+
         #region More api
         public IContextMethods Utilities { get { return this.Context.Utilities; } set { this.Context.Utilities = value; } }
         public AopProvider Aop => this.Context.Aop;

Src/Asp.Net/SqlSugar/SqlSugarScope.cs

@@ -662,5 +662,15 @@ namespace SqlSugar
         {
             return ScopedContext.Fastest<T>();
         }
+
+        public void ThenMapper<T>(IEnumerable<T> list, Action<T> action)
+        {
+            ScopedContext.ThenMapper(list, action);
+        }
+
+        public Task ThenMapperAsync<T>(IEnumerable<T> list, Func<T, Task> action)
+        {
+            return ScopedContext.ThenMapperAsync(list, action);
+        }
     }
 }