Why I am not getting error message in postman using Spring Boot Application

Question

I want "Admin not found" message to display in Postman during invalid login but I am getting this as postman output

{
    "timestamp": "2020-05-19T13:59:01.172+00:00",
    "status": 404,
    "error": "Not Found",
    "message": "",
    "path": "/api/adminLogin"
}

AdminController.java

    @RestController
    @RequestMapping("/api")
    public class AdminController {

    @Autowired
    UserRepository userRepository; 

    @PostMapping("/adminLogin")
    public User login(@RequestBody User user) throws ResourceNotFoundException {

        User user1 = userRepository.findByUserName(user.getUserName());
        if(user1 != null && user1.getRole().equalsIgnoreCase("admin")) {
            return user1;
        }
        else 
        {
            throw new ResourceNotFoundException("Admin not found");
        }
    }

ResourceNotFoundException.java

@ResponseStatus(HttpStatus.NOT_FOUND)
public class ResourceNotFoundException extends RuntimeException {

    private static final long serialVersionUID = 1L;

    public ResourceNotFoundException() {
        super();
    }

    public ResourceNotFoundException(String message) {
        super(message);
    }

    public ResourceNotFoundException(String message, Throwable cause) {
        super(message, cause);
    }
}

My Postman URL http://localhost:8989/api/adminLogin

My admin login success is working fine

Exotic

Are you making a GET or a POST query testing with your Postman? – Bilbrey

POST request @AhmedRebai – Exotic

It would be useful if you add your POSTMAN request - url, method – Schlesien

Are you sure about your API path :/api/adminLogin ? – Bilbrey

@AhmedRebai yes. My login success is working fine – Exotic

This should work! Can you share the github link if possible – Destruct

@JsonCreator public NotFoundException(@JsonProperty("key") String key, @JsonProperty("message") String message) { super(key, message); } can you change your implementation like this – Bilbrey

Answer 1

I solved the problem by including the below code in application.properties file

server.error.include-message = always

Exotic

In application.properties file – Votyak

You saved my a$$ when chatgpt couldn't do it. thanks bro – Moldboard

Answer 2

Generalizing the Controller response with ResponseEntity is the standard pattern.

However you can solve your specific problem using the below as well:

add the below dependency in your build.gradle / POM.XML

runtimeOnly('org.springframework.boot:spring-boot-devtools')

pom.xml

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
    </dependency>

and in your application.properties file:

server.error.include-stacktrace=never

You will start seeing the exception message.

Weisman

Answer 3

You can use RespoenseEntity to modify your response body and status code. If you want to return JSON format you should create a new class like this.

@Data //lombok
public class ResponseModel {

    String message;

    public ResponseModel(String message) {
        this.message = message;
    }
}

and your code like this.

 @PostMapping("/adminLogin")
    public ResponseEntity<?> login(@RequestBody User user) {

        User user1 = userRepository.findByUserName(user.getUserName());
        if(user1 != null && user1.getRole().equalsIgnoreCase("admin")) {
            return new ResponseEntity<>(user1, HttpStatus.OK);
        }
        else 
        {
            return new ResponseEntity<>(new ResponseModel("Admin not found"), HttpStatus.NOT_FOUND);
        }
    }

Axseed

Answer 4

This can be solved using 2 ways:

1. Either use Dev tool dependency in your pom.xml

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
    </dependency>

2. Use the below properties in your application.properties file

#server.error.include-message = always
#server.error.include-stacktrace=always

Here the first property will include an error "message" in your response and the second property will include "trace" in your response.

There is nothing to do with Lombok and ResponseEntity here.

If you are adding only dev tool dependency, no need to add any property as it will include "error" and "stack-trace" by default in your response.

Ethiopic