Invoking other service URL using feign client gives error in postman - spring-boot

Question

I have two services. One is UserDetails service and another is Post service. In userdetails I have a controller in which I am filtering the details of user using areacode.
#GetMapping("/userdetailsbyareacode/{areacode}")
public ResponseEntity<List<UserDetails>> getUserByAreacode(#PathVariable(value="areacode") Long areacode){
List<UserDetails> user=userdetailsService.getuserByAreacode(areacode);
if(user==null) {
return ResponseEntity.notFound().build();
}
return ResponseEntity.ok().body(user);
}
now in post service I am calling this controller method using feign client and filter the post details based on areacode which is in the userdetails. Bothe userdetails and post service have u_id common.
Based on u_id I am filtering the post details from my repository.
public interface PostRepository extends JpaRepository<Posts,Long>
{
#Transactional
#Query(nativeQuery=true,value="SELECT * FROM POSTS WHERE U_ID=:u_id")
List<Posts> findPostsByU_id(#Param("u_id") Long u_id);
}
And here is my post DAO-
public List<Posts> findByU_id(Long u_id){
List<Posts> post=new ArrayList<>();
postRepository.findPostsByU_id(u_id).forEach(post::add);
return post;
}
Now this is the post controller method which I am calling in postman, which is using the feign proxy for calling the UserDetails controller method.
#GetMapping("/findpostbyareacode-feign/{areacode}")
public List<Posts> getPostByAreacodeUsingfeign(#PathVariable(value="areacode") Long areacode){
List<UserDetails> usersList=userProxy.getUserByAreacode(areacode);
List<Posts> postList=new ArrayList<>();
List<Posts> totalPost=new ArrayList<>();
for(UserDetails users : usersList) {
totalPost=postService.findByU_id(users.getU_id());
for(Posts posts : totalPost) {
postList.add(posts);
}
}
return postList;
}
When I am hitting the URL in postman, I am getting this error.
"error": "Internal Server Error",
"message": "could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet",
Here is my UserDetails entity class of UserDetails service.
#Entity
#Table(name="user_details")
#Builder
#Data
#Getter #Setter #NoArgsConstructor #AllArgsConstructor
public class UserDetails implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="user_id", unique=true)
private Long user_id;
#Column(name="user_name", length=35, nullable=false)
#Size(min=2,message="Name should have atleast 2 character")
private String user_name;
#Column(name="gender", nullable=false)
private String gender;
#Column(name="dob")
#DateTimeFormat(pattern="yyyy-MM-dd")
private Date dob;
#Column(name="email", length=50, unique=true, nullable=false)
private String email;
#Column(name="phno", length=11, nullable=false)
private String phno;
#Column(name="password", nullable=false)
//#JsonIgnore
private String password;
#Column(name="areacode", length=11)
private Long areacode;
#Column(name="u_Id")
private Long u_id;
}
And here is my post entity of Post service-
#Entity
#Table(name="vob_posts")
#Getter #Setter #NoArgsConstructor #AllArgsConstructor
public class Posts implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="post_id", unique=true)
private Long post_id;
#Column(name="contents")
private String contents;
#Column(name="u_id")
private Long u_id;
}
My both services are registered in eureka.
Cant solve this issue, pls help anyone.

Answer 1

why you are making code complex and How come primary key returns List<Posts>. Try with the below code.
Just make change below in your Entity and Repository.
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="user_id", unique=true)
private Long id;
//private Long userId;
#Column(name="user_name", length=35, nullable=false)
#Size(min=2,message="Name should have atleast 2 character")
private String userName;
public interface PostRepository extends JpaRepository<Posts,Long>
{
}
(or)
public interface PostRepository extends CrudRepository<Posts,Long>
{
//Optional<Posts> posts findByUserId(Long userId);
}
Service Layer :
Approach 1 : Using JPA Repository
Posts posts = repo.getOne(userId);
Approach 2 : Using Crud Repository
Posts posts = repo.findById(userId).get();
//Posts posts = repo.findByUserId(userId).get();