[FIXED] Using Object class as wrapper for input in spring boot RestController

Issue

I am bit new to spring boot and I am trying to design a search on user history which will provide 3 attributes to search user history {userId, searchKey, SearchValue}.

The search value datatype may differ based on search.

E.g

1. Userid=100, SearchKey=userAddress, searchValue='10 Downing Street'
2. Userid=100, SearchKey=external, searchValue=true
3. Userid=100, SearchKey=companyId, searchValue=25

I am trying to design a rest endpoint as below. This endpoint will integrate with react front end.

@GetMapping(value = "/searchUserHistoryByKeyValue")
public ResponseEntity<Object> searchUserHistoryByKeyValue(
      @RequestParam(value = "userId") int userId,
      @RequestParam(value = "searchKey") String searchKey,
      @RequestBody Object searchValue) {

          List<org.json.simple.JSONObject> entities =
              userHistoryService.searchUserHisotryByKeyValue(userId, searchKey, searchValue);
          return new ResponseEntity<>(entities, HttpStatus.OK);
}

I have implemented a dynamodb search on userhistory object which takes input as generic searchValue object as search filter as below. Dynamo DB Querying - https://www.tutorialspoint.com/dynamodb/dynamodb_querying.htm

 public List<JSONObject> searchUserHistoryByKeyValue(
      int userId, String searchKey, Object searchValue) throws DataAccessException {

  Table table = dynamoDB.getTable(userHistoryTable.getName());

  Map<String, String> expressionAttributeNames =
      DEFAULT_USER_FILTERS.stream()
          .collect(
              Collectors.toMap(attrib -> attrib, attrib -> attrib.substring(1), (a, b) -> b));

Optional<String> projectionExpression =
          createProjectionExpression(
              Collections.singletonList(searchKey), expressionAttributeNames);

      Optional<String> filterProjectionExpression =
          buildCustomProjectionExpression(
              Collections.singletonList(searchKey), expressionAttributeNames);

      QuerySpec querySpec =
          new QuerySpec()
              .withProjectionExpression(projectionExpression.orElse(StringUtils.EMPTY))
              .withKeyConditionExpression("#userId = :userId")
              .withFilterExpression(
                  String.format(
                      "%s = :searchValue",
                      filterProjectionExpression.orElseThrow(
                          () -> new IllegalArgumentException("Invalid Search Attributes"))))
              .withNameMap(expressionAttributeNames)
              .withValueMap(Map.of(":userId", userId, ":searchValue", searchValue))
              .withScanIndexForward(false);

When I am trying use swagger or postman to test this endpoint , I am not able to pass in @RequestBody Object searchValue . it just shows as empty braces - {}

Also it shows below error as -

'TypeError: Failed to execute 'fetch' on 'Window': Request with GET/HEAD method cannot have body. '

I am not able to make this work? Appreciate your insights on this.

Solution

It's HTTP protocol. You cannot pass any body object with the Get method. You have to use Post or Put method for using a body in HTTP request.

Answered By - sixrandanes
Answer Checked By - Cary Denson (JavaFixing Admin)