SpringBoot: ModelAttribute default property through yml file not working

Question

Age limit default value is not picked by ModelAttribute, However it was working fine with request parameter.

YML File

age:            
    default:
        limit:  60

Below is old Code with Request Parameter Request

public ResponseEntity<Account> getPersonAccount(@RequestParam String name,@Min(value=0) @RequestParam(required = false, defaultValue = "${age.default.limit}") Integer limit
){
}

Below is new Code with ModelAttribute Request

public ResponseEntity<Account> getPersonAccount(@ModelAttribute("person" ) Person person) {}

@Configuration
public class Person implements Serializable {
    private String name;
    @Value("${age.default.limit}" )
    private Integer limit;
    getter/setter
}

Have you look at this post? stackoverflow.com/questions/12296642/… — horatius
– horatius, Commented Jul 14, 2018 at 9:30
This post is different related to parameter only. I just want to initialize model attribute object's property from yml file. — Ajay Sharma
– Ajay Sharma, Commented Jul 14, 2018 at 10:18
You can't use yml properties anywhere and everywhere. "@Value" njects it into private variables via getters and setters. You can't assign defaultValue parameter in the "@RequestParam" just by putting the ${property} in there. — horatius
– horatius, Commented Jul 14, 2018 at 10:39
defaultValue = "${age.default.limit}" in request parameter was working fine from yml file. I only want to provide default value to new model object from yml file. I am looking solution for that only. getter/ setter are already there. — Ajay Sharma
– Ajay Sharma, Commented Jul 14, 2018 at 10:49
That's not how it works at all. For you to substitute a yml config item, you need '@Value'. You can't assign without using '@Value' and you can't use @Value in '@RequestParam' — horatius
– horatius, Commented Jul 14, 2018 at 12:56

Ajay Sharma · Accepted Answer · 2018-07-14 16:30:57Z

0

public class PersonController { 
@Value("${age.default.limit}" )
private Integer limit;

@ModelAttribute("person")
public Person populatePerson() {
    Person person = new Person();
    person.setLimit(limit);
    return user;
}

public ResponseEntity<Account> getPersonAccount(@ModelAttribute("person" ) Person person) {}

}

edited Jul 14, 2018 at 16:30

answered Jul 14, 2018 at 15:46

Ajay Sharma

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