Update mongodb

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

@@ -1,4 +1,5 @@
-using SqlSugar.MongoDb;
+using SqlSugar;
+using SqlSugar.MongoDb;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -22,6 +23,8 @@ namespace MongoDbTest
             db.Updateable(data1).ExecuteCommand();
             var data2 = db.Queryable<Student>().ToList(); 
             if (data2.First().Book.First().Price != 100) Cases.ThrowUnitError();
+            var exp=Expressionable.Create<Student>().ToExpression();
+            var data3 = db.Queryable<Student>().Where(exp).ToList();
         }
 
         [SqlSugar.SugarTable("UnitStudentdfsds3zzz1")]

Src/Asp.NetCore2/SqlSugar.MongoDbCore/ExpToSql/MongoNestedTranslator.cs

@@ -17,10 +17,30 @@ namespace SqlSugar.MongoDb
         {
             var result = new ExpressionVisitor(context).Visit(expr);
             if (result is BsonString bs)
-            {
+                result = TranslateStringToBson(bs);
-                result = new BsonDocument(UtilConstants.FieldName, bs);
+            else if (result is BsonBoolean bb)
-            }
+                result = TranslateBooleanToBson(bb);
             return (BsonDocument)result;
         }
+
+        private static BsonValue TranslateStringToBson(BsonString bs)
+        {
+            return new BsonDocument(UtilConstants.FieldName, bs);
+        }
+
+        private static BsonValue TranslateBooleanToBson(BsonBoolean bb)
+        {
+            BsonValue result;
+            if (bb == true)
+            {
+                result = new BsonDocument("$expr", new BsonDocument("$eq", new BsonArray { 1, 1 }));
+            }
+            else
+            {
+                result = new BsonDocument("$expr", new BsonDocument("$eq", new BsonArray { 1, 0 }));
+            }
+
+            return result;
+        }
     }
 }