Why does the received entity in my @RestController is setting value to null not to default

Question

I am using :

spring data rest
lombok

When I receive my entity in my controller

@PostMapping
@ResponseStatus(HttpStatus.CREATED)
Long create(@RequestBody Blog blog) {
  blogService.insert(blog);
  return blog.getId();
}

I only set the blog name, however, Blog.java contains default values:

private Boolean isDisabled = false;
private Boolean canCreateTags = true;
private Boolean canCreateCategories = true;
private Boolean hasRss = false;

This is the request body of my request :

{"organization":{"id":"1"},"description":"test"}

All the unsend values appear to be null.

However when I use the BlogDTO instead of Blog:

@PostMapping
@ResponseStatus(HttpStatus.CREATED)
Long create(@RequestBody BlogDTO blog) {
  blogService.insert(blog);
  return blog.getId();
}

All the values are set with defaults.

Why is the instance not created with my defaults?
Why is the DTO instance created with defaults?

Please mark the answer as right if it was helpful to you – Aarish Ramesh Jan 11 '18 at 07:05 — Aarish Ramesh, Jan 11 '18 at 07:05

score 1 · Accepted Answer · answered Jan 11 '18 at 07:03

Overriding the toString method of Blog.java with default values should solve this problem like below

public class Blog {

private Boolean isDisabled = false;
private Boolean canCreateTags = true;
private Boolean canCreateCategories = true;
private Boolean hasRss = false;

    @Override
        public String toString() {
            return "Blog{" +
                    "isDisabled='" + isDisabled + '\'' +
                    ", canCreateTags='" + canCreateTags + '\'' +
                    ", canCreateCategories=" + canCreateCategories +
                    '}';
        }
    }

Please refer this question and answer as a reference Spring 4 MVC - Rest service - use default values in beans

score 0 · Answer 2 · answered Jan 11 '18 at 06:57

0

if you want to have default value you need to set explicitly while sending to post call body

answered Jan 11 '18 at 06:57

spandey

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This is not completely true, I've added an example with a DTO object that does the job – Dimitri Kopriwa Jan 11 '18 at 07:00

Why does the received entity in my @RestController is setting value to null not to default

2 Answers2