I am trying to create a Expense tracker application using SpringBoot, MonogDB and ReactJS

I have a collection called “userexpense” which as three fields “id”,”email” and “expenses”

``{
  "id":"123",
  "email":"[email protected]",
  "expenses":[
     {
          "taskid":"xyz",
         "amount" : "90",
        "description : "vada pav",
         "category" : "food"
     },
    {
          "taskid":"qpr", "amount" : "900","description : "train","category" : "transport"
     }
 ]
}`

“expenses” is an array of objects which holds expenses of individual users.
I want to perform update operation on element of expenses array.
updates like changing the amount and description of a particular expense based its taskid.

How can i do this?

github repo:
https://github.com/Sumit-Rodge/spring-boot-expense-api

This is what i have tried

`    Query query = new Query();
            Criteria criteria1 = Criteria.where("id").is(id);
            Criteria criteria2 = Criteria.where("expenses").elemMatch(Criteria.where("id").is(taskid));
            query.addCriteria(new Criteria().andOperator(criteria1, criteria2));

       Update update = new Update().pull("Expenses" , new BasicDBObject("id",taskid));

       mongoTemplate.update(query,update,UserExpense.class);

`