diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ExpressionContext.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ExpressionContext.cs
index 52136e468..67eb27bda 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ExpressionContext.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ExpressionContext.cs
@@ -134,6 +134,7 @@ namespace SqlSugar
             copyContext.IsSingle = this.IsSingle;
             copyContext.RootExpression = this.RootExpression;
             copyContext.TableEnumIsString = this.TableEnumIsString;
+            copyContext.SugarContext = this.SugarContext;
             return copyContext;
         }
         public ExpressionContext GetCopyContextWithMapping()
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs
index 3ba2bd0bf..1469ccc71 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MemberExpressionResolve.cs
@@ -86,6 +86,12 @@ namespace SqlSugar
                         AppendValue(parameter, isLeft, value);
                     }
                 }
+                else if(expression.Expression is UnaryExpression&&(expression.Expression as UnaryExpression).Operand is ParameterExpression) 
+                {
+                    var memParameter = (expression.Expression as UnaryExpression).Operand as ParameterExpression;
+                    var name = ExpressionTool.GetMemberName(expression);
+                    this.Context.Result.Append(this.Context.GetTranslationColumnName(memParameter.Name+"."+name));
+                }
                 else
                 {
                     ResolveMemberValue(parameter, baseParameter, isLeft, isSetTempData, expression);
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
index 820457e8e..cce1dc9e6 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
@@ -280,9 +280,16 @@ namespace SqlSugar
                     base.AppendValue(parameter, isLeft, parameterName);
                 }
             }
-            catch
+            catch(Exception ex)
             {
-                Check.Exception(true, string.Format(ErrorMessage.MethodError, express.Method.Name));
+                if (ex is SqlSugarException)
+                {
+                    Check.Exception(true, string.Format(ex.Message, express.Method.Name));
+                }
+                else
+                {
+                    Check.Exception(true, string.Format(ErrorMessage.MethodError, express.Method.Name));
+                }
             }
         }
 
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/OneToManyNavgateExpression.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/OneToManyNavgateExpression.cs
index a8d7895cb..3cda36124 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/OneToManyNavgateExpression.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/OneToManyNavgateExpression.cs
@@ -135,7 +135,10 @@ namespace SqlSugar
         }
         private MapperSql GetOneToManySql()
         {
-            var pk = this.EntityInfo.Columns.First(it => it.IsPrimarykey == true).DbColumnName;
+            var pkColumn = this.EntityInfo.Columns.FirstOrDefault(it => it.IsPrimarykey == true);
+            Check.ExceptionEasy(pkColumn == null, $"{this.EntityInfo.EntityName} need primary key ",
+                $"导航属性 {this.EntityInfo.EntityName}需要主键");
+            var pk = pkColumn.DbColumnName;
             var name = this.ProPertyEntity.Columns.First(it => it.PropertyName == Navigat.Name).DbColumnName;
             //var selectName = this.ProPertyEntity.Columns.First(it => it.PropertyName == MemberName).DbColumnName;
             MapperSql mapper = new MapperSql();