Update mongodb

Src/Asp.NetCore2/MongoDbTest/UnitTest/QueryWhere.cs

@@ -9,17 +9,54 @@ namespace MongoDbTest
 {
     public class QueryWhere
     {
-        public static void Init() 
+        public static void Init()
         {
-            var db = DBHelper.DbHelper.GetNewDb(); 
-            db.CodeFirst.InitTables<Student>();
-            db.DbMaintenance.TruncateTable<Student>();
-            db.Insertable(new Student() { Name = "jack",Bool=true, SchoolId =2 }).ExecuteCommand();
-            db.Insertable(new Student() { Name = "tom_null", Bool = false,BoolNull=true, SchoolId =3 ,SchoolIdNull=4}).ExecuteCommand();
-            var list=db.Queryable<Student>().ToList();
+            //创建DB
+            var db = DBHelper.DbHelper.GetNewDb();
+
+            //初始化数据
+            InitializeStudentData(db);
+
+            //null类型测试
+            ValidateStudentData(db);
+
+            //函数
+            FilterStudentsByFunc(db);
+
+            //根据bool过滤
+            FilterStudentsByBool(db);
+        }
+
+        private static void FilterStudentsByBool(SqlSugar.SqlSugarClient db)
+        {
+            //bool类型测试
+
+            var list1 = db.Queryable<Student>().Where(it => it.Bool == true).ToList();
+            //var list2 = db.Queryable<Student>().Where(it => it.Bool).ToList();
+            //var list3 = db.Queryable<Student>().Where(it => !it.Bool).ToList();
+        }
+
+        private static void FilterStudentsByFunc(SqlSugar.SqlSugarClient db)
+        {
+            var list = db.Queryable<Student>().Where(it => it.Name.Contains("ck")).ToList();
+            if (!list.First().Name.Contains("ck")) Cases.ThrowUnitError();
+        }
+
+        private static void ValidateStudentData(SqlSugar.SqlSugarClient db)
+        {
+            var list = db.Queryable<Student>().ToList();
             if (list.First() is { } first && (first.BoolNull != null || first.SchoolIdNull != null)) Cases.ThrowUnitError();
             if (list.Last() is { } last && (last.BoolNull != true || last.SchoolIdNull != 4)) Cases.ThrowUnitError();
         }
+
+        private static void InitializeStudentData(SqlSugar.SqlSugarClient db)
+        {
+            db.CodeFirst.InitTables<Student>();
+            db.DbMaintenance.TruncateTable<Student>();
+            db.Insertable(new Student() { Name = "jack", Bool = true, SchoolId = 2 }).ExecuteCommand();
+            db.Insertable(new Student() { Name = "tom_null", Bool = false, BoolNull = true, SchoolId = 3, SchoolIdNull = 4 }).ExecuteCommand();
+        }
+
         [SqlSugar.SugarTable("UnitStudent1ssss23s131")]
         public class Student : MongoDbBase
         {

Src/Asp.NetCore2/SqlSugar.MongoDbCore/ExpToSql/VisitorItems/MethodCallExpressionTractor.cs

@@ -32,6 +32,7 @@ namespace SqlSugar.MongoDb
                     MethodCallExpressionModel model = new MethodCallExpressionModel();
                     var args= methodCallExpression.Arguments; 
                     model.Args = new List<MethodCallExpressionArgs>();
+                    model.DataObject = methodCallExpression.Object;
                     foreach (var item in args)
                     {
                         model.Args.Add(new MethodCallExpressionArgs() { MemberValue = item });

Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbExpressionContext.cs

@@ -239,6 +239,23 @@ namespace SqlSugar.MongoDb
             context.queryBuilder.GroupByValue += $"({UtilConstants.ReplaceCommaKey}({result}){UtilConstants.ReplaceCommaKey})";
             context.queryBuilder.LambdaExpressions.Index++;
             return name;
+        } 
+        public override string Contains(MethodCallExpressionModel model)
+        {
+            var item = model.Args.First().MemberValue;
+            BsonValue right = new ExpressionVisitor(context).Visit(item as Expression);
+            BsonValue left = new ExpressionVisitor(context).Visit(model.DataObject as Expression);
+            // 构造 $regex 匹配
+            var regexDoc = new BsonDocument
+            {
+                { "$regex", right },        // right 是普通字符串值，例如 "a"
+                { "$options", "i" }         // 忽略大小写
+            }; 
+            var match = new BsonDocument("$match", new BsonDocument
+                {
+                    { left.ToString(), regexDoc }
+                });
+            return match.ToJson(UtilMethods.GetJsonWriterSettings());
         }
     }
 }

Src/Asp.NetCore2/SqlSugar.MongoDbCore/MongoDb/SqlBuilder/MongoDbQueryBuilder.cs

@@ -64,8 +64,17 @@ namespace SqlSugar.MongoDb
                     trimmed = trimmed.Substring(5).TrimStart();
                 else if (trimmed.StartsWith("AND", StringComparison.OrdinalIgnoreCase))
                     trimmed = trimmed.Substring(3).TrimStart();
-                // item 是 JSON 格式字符串，直接包进 $match
-                operations.Add($"{{ \"$match\": {trimmed} }}");
+                if (IsFieldNameJson(trimmed))
+                {
+                    var outerDoc = BsonDocument.Parse(trimmed);
+                    trimmed = outerDoc["fieldName"].AsString;
+                    operations.Add(trimmed);
+                }
+                else
+                {
+                    // item 是 JSON 格式字符串，直接包进 $match
+                    operations.Add($"{{ \"$match\": {trimmed} }}");
+                }
             }
             #endregion
 
@@ -192,6 +201,12 @@ namespace SqlSugar.MongoDb
 
             return sb.ToString();
         }
+
+        private bool IsFieldNameJson(string trimmed)
+        {
+            return trimmed.StartsWith("{ \"fieldName\" : ");
+        }
+
         public override string ToCountSql(string sql)
         {
             sql=sql.TrimEnd(']');