Attempting to make a POST request with some missing data is causing errors in my angular form. Here is the payload I am using:
DeviceDetail{
deviceId:'332',
sideId: null,
deviceName:'test'
}Unfortunately, I encountered a 400 bad request error upon submission. The response preview displayed the following error message: 0: "Error converting value {null} to type 'System.Int32'. Path 'sideId'
C# Programming:
public class DeviceInfo {
public string DeviceCode;
public int StationId; -> This field does not accept null values
public int? StationId; -> This field can have null values
public string DeviceCategory;
}
If you encounter a scenario where you need to assign null to 0, you can do it like this:
Angular Framework:
const stationId = stationId ? stationId : 0;
After reviewing the details, I agree with Tartarus's response, however, I would like to delve deeper into this issue: in my perspective, handling the nullcheck inline just before sending the request may not be the most elegant solution.
If 'sideId' has the potential to be null, then it should be considered as an optional parameter. In JavaScript, undefined is the type for variables that are not defined or have no value assigned, which could lead to unexpected behavior in the code provided by the question giver. A more proactive approach would be to address this issue at the point of creating the DeviceDetail object, where a default value can be set in the class constructor to prevent any "self generated NullPointerExceptions."
Additionally, it is crucial to ensure that the backend validation processes also account for required input data. It raises concern how such a fundamental aspect of data validation could potentially be overlooked.
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