JSON parse error: Cannot deserialize instance of 'com.asc.project.service.dto.TaskDataDTO' [duplicate]

Question

I have this error:

JSON parse error: Cannot deserialize instance of com.asc.skyalign.service.dto.TaskDataDTO out of START_ARRAY token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of com.asc.skyalign.service.dto.TaskDataDTO out of START_ARRAY token\n at [Source: (PushbackInputStream); line: 10, column: 21] (through reference chain: com.asc.skyalign.service.dto.WorkOrderDTO["taskDataList"])

When post Json API, this is my request :

 { "siteLocationLat": "35.123415", "workOrderID": "WO-1rmrud5gkdj4r0n6", "siteId": "NNA-12312312311", "siteAcessNotes": "No notes", "siteLocationLong": "128.910283984", "assignedTo": "[email protected]", "timeStamp": 1596738379102, "email": "[email protected]", "taskDataList": [ { "roll": "2.0", "azimuth": "120.0", "tilt": "9.0", "sectorLocationLat": "35.123451", "amtImei": "35800121213", "wakeuUpInterval": "1440", "sectorID": "NNA-12312312311-1", "sectorLocationLong": "128.123123", "taskName": "Install AMT Sector A", "taskDescription": "Install AMT on Back of the Antenna" } ] }

My WorkOrderDto is:

 public class WorkOrderDTO implements Serializable { private List<TaskDataDTO> taskDataList=new ArrayList<TaskDataDTO>(); public List<TaskDataDTO> getTaskDataList() { return taskDataList; } public void setTaskDataList(TaskDataDTO taskDataDTO) { this.taskDataList.add(taskDataDTO); } }

and my WorkOrder Entity is :

public class WorkOrder implements Serializable { private List<TaskData> taskDataList=new ArrayList<TaskData>(); public List<TaskData> getTaskDataList() { return taskDataList; } public void setTaskDataList(TaskData taskData) { taskDataList.add(taskData); } }

when run my application and request the api and before arrived my controller i see this Exception in postman body :

JSON parse error: Cannot deserialize instance of com.asc.skyalign.service.dto.TaskDataDTO out of START_ARRAY token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of com.asc.skyalign.service.dto.TaskDataDTO out of START_ARRAY token\n at [Source: (PushbackInputStream); line: 10, column: 21] (through reference chain: com.asc.skyalign.service.dto.WorkOrderDTO["taskDataList"])

and this error in Java Idea terminal :

Bad Request: JSON parse error: Cannot deserialize instance of com.asc.skyalign.service.dto.TaskDataDTO out of START_ARRAY token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of com.asc.skyalign.service.dto.TaskDataDTO out of START_ARRAY token at [Source: (PushbackInputStream); line: 10, column: 21] (through reference chain: com.asc.skyalign.service.dto.WorkOrderDTO["taskDataList"])

You will need to include the task data dto class here to be helpful - that’s where your error is — AlBlue
– AlBlue, Commented Feb 7, 2021 at 10:47

tomeszmh · Accepted Answer · 2021-02-07 11:10:43Z

public void setTaskDataList(TaskDataDTO taskDataDTO) { this.taskDataList.add(taskDataDTO); }

is strange for me, you say that you set the task data list, and you have a taskDataDto in parameter that you add it to the list. WorkOrderDto taskdatalist getter and setter should be something like this

@JsonProperty("taskDataList") public List<TaskDataList> getTaskDataList() { return taskDataList; } @JsonProperty("taskDataList") public void setTaskDataList(List<TaskDataList> value) { this.taskDataList = value; }

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JSON parse error: Cannot deserialize instance of 'com.asc.project.service.dto.TaskDataDTO' [duplicate]

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