RepositoryRestController: POST with multiple HAL URI

Question

I've OneToMany relation between User & Address and ManyToOne relation with EmploymentType.

@Entity
public class User {
    //..
    private String name;

    @ManyToOne
    private EmploymentType employmentType;

    @OneToMany(mappedBy = "user")
    private Set<Skill> skills = new HashSet<>();
    //..
}

@Entity
public class Skill {
    //..
    @ManyToOne
    private User user;
    //..
}

@Entity
public class EmploymentType {
    //..
    @ManyToOne
    private User user;
    //..
}

@RepositoryRestController
public class CustomUserController {
        private UserRepository userRepository;

        @PostMapping(path = "/users/createUserWithEmploymentType")
    public @ResponseBody String  createUserWithEmploymentType(@RequestBody EntityModel<User> users) {
        System.out.println(users);
        // ....
        return "SUCCESS";
    }

        @PostMapping(path = "/users/createUserWithSkillBatch")
    public @ResponseBody String createUserWithSkill(@RequestBody CollectionModel<EntityModel<User>> users) {
        System.out.println(users);
        // ....
        return "SUCCESS";
    }
}

I need to use custom RepositoryRestController for some additional check before I persist the records.

curl -i -X POST -H "Content-Type:application/json" -d '{"name": "Kiran Kyle", "employmentType": "http://localhost:8080/api/v1/employmentTypes/1"}' http://localhost:8080/api/v1/users/createUserWithEmploymentType

This curl works.

curl -i -X POST -H "Content-Type:application/json" -d '[{"name": "Kiran Kyle", "skill": ["http://localhost:8080/api/v1/skills/1", "http://localhost:8080/api/v1/skills/2"]}]' http://localhost:8080/api/v1/users/createUserWithSkillBatch

This does not giving error ...ExceptionHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize value of type org.springframework.hateoas.CollectionModelfrom Array value (tokenJsonToken.START_ARRAY); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type org.springframework.hateoas.CollectionModelfrom Array value (tokenJsonToken.START_ARRAY)<EOL> at [Source: (org.springframework.util.StreamUtils$NonClosingInputStream); line: 1, column: 1]]

It seems when there is an array of HAL URI's, spring does not convert to entity object.

You should not use `CollectionModel` or `EntityModel` as request body type. — yejianfengblue, Jun 06 '23 at 00:45
@yejianfengblue if CollectionModel or EntityModel is not used resource uri's are not resolved to entities and we get JSON parse error. That was my original question. — Kiran Kyle, Jun 08 '23 at 11:15

score 0 · Answer 1 · answered Jun 02 '23 at 10:02

0

Since you have used RequestBody as CollectionModel, you might have to send array of objects instead of single object to CURL command:

curl -i -X POST -H "Content-Type:application/json" -d '[{"name": "Kiran Kyle", "skill": ["http://localhost:8080/api/v1/skills/1", "http://localhost:8080/api/v1/skills/2"]}]' http://localhost:8080/api/v1/users/1/createUserWithSkill

answered Jun 02 '23 at 10:02

Gopinath Radhakrishnan

459
4
7

Gopinath Radhakrishana, it does not work. I updated CollectionModel>> to CollectionModel. It does not give me parsing error but get blank user now. Here is the application. https://github.com/roykyle8/repositoryrestcontroller – Kiran Kyle Jun 02 '23 at 13:16

RepositoryRestController: POST with multiple HAL URI

1 Answers1