Add demo

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

@@ -30,6 +30,7 @@ namespace MongoDbTest
             //The primary key is not an ObjectId type use case
             LongPrimaryKey.Init();
             GuidPrimaryKey.Init();
+            StringPrimaryKey.Init();
         } 
         public static void ThrowUnitError()
         {

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

@@ -44,7 +44,7 @@ namespace MongoDbTest
         }
 
         [SqlSugar.SugarTable("UnitStutsdsdfr5fazzz1")]
-        public class Student: MongoDbBaseLong
+        public class Student: MongoDbBaseLong//继承long主键
         { 
             public string Name { get; set; }
         }

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

@@ -0,0 +1,49 @@
+using SqlSugar.MongoDb;
+namespace MongoDbTest
+{
+    internal class StringPrimaryKey
+    {
+        public static void Init()
+        {
+            var db = DbHelper.GetNewDb();
+            db.DbMaintenance.TruncateTable<Student>();
+            var id = Guid.NewGuid().ToString();
+            db.Insertable(new Student()
+            {
+                Name = "a",
+                Id = id
+
+            }).ExecuteCommand();
+
+            var data = db.Queryable<Student>().Where(it => it.Id == id).ToList();
+            if (data.First().Id != id) Cases.ThrowUnitError();
+            data.First().Name = "a2";
+            db.Updateable(data).ExecuteCommand();
+            var data2 = db.Queryable<Student>().Where(it => it.Id == id).ToList();
+            if (data.First().Name != "a2") Cases.ThrowUnitError();
+            Console.WriteLine(db.Queryable<Student>().Count());
+            db.Deleteable<Student>().Where(it => it.Id == id).ExecuteCommand();
+            if (db.Queryable<Student>().Count() != 0) Cases.ThrowUnitError();
+            db.Insertable(new Student()
+            {
+                Name = "a",
+                Id = id
+            }).ExecuteCommand();
+            var rows = db.Deleteable<Student>().Where(it => new string[] { id }.Contains(it.Id)).ExecuteCommand();
+            if (db.Queryable<Student>().Count() != 0) Cases.ThrowUnitError();
+            db.Insertable(new Student()
+            {
+                Name = "a",
+                Id = id
+            }).ExecuteCommand();
+            var row2 = db.Deleteable<Student>(new Student() { Id = id }).ExecuteCommand();
+            if (db.Queryable<Student>().Count() != 0) Cases.ThrowUnitError();
+        }
+
+        [SqlSugar.SugarTable("UnitStutsdsdfr5fazzz1")]
+        public class Student : MongoDbBaseString //继承string主键
+        {
+            public string Name { get; set; }
+        }
+    }
+}