优化 ToString 方法

Author: lianggx

.vs/MyStaging/v15/.suo

@@ -21,6 +21,12 @@ public UpdateBuilderTest()
         public void Update()
         {
             string userid = "5b1b54bfd86b1b3bb0000009";
+            var user = User.Context.Where(f => f.Id == userid).ToOne();
+            var builder = user.UpdateBuilder;            
+            builder.SetMoney(2000);
+            var sql = builder.ToString();
+            builder.SaveChange();
+           
             var rows = User.UpdateBuilder.Where(f => f.Id == userid).SetMoney(2000).SetSex(false).SaveChange();
 
             Assert.Equal(1, rows);

MyStaging.xUnitTest/UpdateBuilderTest.cs

@@ -25,7 +25,6 @@ namespace MyStaging.Helpers
         /// <returns></returns>
         public int SaveChange()
         {
-            string tableName = MyStagingUtils.GetMapping(typeof(T));
             if (WhereExpressionList.Count > 0)
             {
                 foreach (var item in WhereExpressionList)
@@ -40,9 +39,21 @@ public int SaveChange()
             if (this.WhereList.Count == 0)
                 throw new ArgumentException("The delete operation must specify where conditions!");
 
+            this.ToString();
+
+            return base.ExecuteNonQuery(this.CommandText);
+        }
+
+        /// <summary>
+        ///  重写方法
+        /// </summary>
+        /// <returns></returns>
+        public override string ToString()
+        {
+            string tableName = MyStagingUtils.GetMapping(typeof(T));
+            this.CommandText = $"DELETE FROM {tableName} a {"WHERE " + string.Join("\nAND ", WhereList)}";
 
-            string cmdText = $"DELETE FROM {tableName} {"WHERE " + string.Join("\nAND ", WhereList)}";
-            return base.ExecuteNonQuery(cmdText);
+            return this.CommandText;
         }
     }
 }

MyStaging/Helpers/DeleteBuilder.cs

@@ -87,10 +87,6 @@ protected UpdateBuilder<T> SetArrayRemove(string field, NpgsqlDbType dbType, obj
         /// <returns></returns>
         public int SaveChange()
         {
-            if (this.setList.Count == 0)
-                throw new ArgumentException("fields to be updated must be provided!");
-
-            string tableName = MyStagingUtils.GetMapping(typeof(T));
             if (WhereExpressionList.Count > 0)
             {
                 foreach (var item in WhereExpressionList)
@@ -102,28 +98,43 @@ public int SaveChange()
                 }
             }
 
+            if (this.setList.Count == 0)
+                throw new ArgumentException("fields to be updated must be provided!");
+
             if (this.WhereList.Count == 0)
                 throw new ArgumentException("The update operation must specify where conditions!");
 
+            this.ToString();
 
-            string cmdText = $"UPDATE {tableName} SET {string.Join(",", this.setList)} {"WHERE " + string.Join("\nAND ", WhereList)}";
             int affrows = 0;
             if (OnChanged != null)
             {
-                cmdText += " RETURNING *;";
+                this.CommandText += " RETURNING *;";
 
-                var objList = base.ByMaster().ExecuteReader<T>(cmdText);
+                var objList = base.ByMaster().ExecuteReader<T>(this.CommandText);
                 affrows = objList.Count;
                 if (affrows > 0 && this.OnChanged != null)
                 {
                     OnChanged(objList[0]);
                 }
             }
             else
-                affrows = base.ExecuteNonQuery(cmdText);
+                affrows = base.ExecuteNonQuery(this.CommandText);
 
             return affrows;
         }
 
+        /// <summary>
+        ///  重写方法
+        /// </summary>
+        /// <returns></returns>
+        public override string ToString()
+        {
+            string tableName = MyStagingUtils.GetMapping(typeof(T));
+            this.CommandText = $"UPDATE {tableName} a SET {string.Join(",", this.setList)} {"WHERE " + string.Join("\nAND ", WhereList)}";
+
+            return this.CommandText;
+        }
+
     }
 }

MyStaging/Helpers/UpdateBuilder.cs

@@ -8,9 +8,9 @@
     <Copyright>MIT</Copyright>
     <PackageLicenseUrl>https://github.com/lianggx/mystaging/blob/master/LICENSE</PackageLicenseUrl>
     <PackageProjectUrl>https://github.com/lianggx/mystaging</PackageProjectUrl>
-    <Version>1.0.5</Version>
-    <AssemblyVersion>1.0.5.0</AssemblyVersion>
-    <FileVersion>1.0.5.0</FileVersion>
+    <Version>1.0.6</Version>
+    <AssemblyVersion>1.0.6.0</AssemblyVersion>
+    <FileVersion>1.0.6.0</FileVersion>
     <PackageReleaseNotes>增加 Update 和 Delete 操作的检查，当没有指定更新字段和 Where 条件时，将抛出异常，防止对整表的误操作</PackageReleaseNotes>
   </PropertyGroup>