Hi
I'm having an issue where the last element in my Object's list is not
getting serialized. Debugging shows that the required values for Categories
are present.
Submitting a number of times, the order of this list can change, and the
pattern is that the last element is never serialized. Any ideas?
V2.9.9.
spring-boot: 2.1.6.RELEASE
Each object in array is a Vendor, and the object in categories is Category.
{
"4": [
{
"id": 76,
"active": 0,
"address": "",
"contactCell": "",
"contactEmail": "",
"contactFirstName": "test25",
"contactSurname": "tester25",
"description": "",
"firebaseUserId": "534k5d3gfhj554",
"latitude": "",
"logoImage": "",
"longitude": "",
"name": "kires2hhhgghh",
"categories": [
{
"id": 5,
"name": "Clothing"
},
{
"id": 4,
"name": "Cosmetics"
}
]
},
{
"id": 72,
"active": 1,
"address": "",
"contactCell": "",
"contactEmail": "",
"contactFirstName": "test25",
"contactSurname": "tester25",
"description": "",
"firebaseUserId": "534k5d3gfhj554",
"latitude": "",
"logoImage": "",
"longitude": "",
"name": "kirenbss2ghhh",
"categories": [
{
"id": 1,
"name": "Pet Related"
},
4 <---Expecting a Category Object like the one in
Object id 76.
]
}
]
}
Alternate Response:
{
"4": [
{
"id": 72,
"active": 1,
"address": "",
"contactCell": "",
"contactEmail": "",
"contactFirstName": "test25",
"contactSurname": "tester25",
"description": "",
"firebaseUserId": "534k5d3gfhj554",
"latitude": "",
"logoImage": "",
"longitude": "",
"name": "kirenbss2ghhh",
"categories": [
{
"id": 4,
"name": "Cosmetics"
},
{
"id": 1,
"name": "Pet Related"
}
]
},
{
"id": 76,
"active": 0,
"address": "",
"contactCell": "",
"contactEmail": "",
"contactFirstName": "test25",
"contactSurname": "tester25",
"description": "",
"firebaseUserId": "534k5d3gfhj554",
"latitude": "",
"logoImage": "",
"longitude": "",
"name": "kires2hhhgghh",
"categories": [
{
"id": 5,
"name": "Clothing"
},
4
]
}
]
}
Code:
Controller
@GetMapping("categories/filter")
public ResponseEntity<Map<Object, Object>>
getVendorByCategory(@RequestBody Set<Category> categories) {
Map<Object, Object> vendor = service.findAllCategories(categories);
return new ResponseEntity<Map<Object,Object>>(vendor,
HttpStatus.OK);
}
--Service
public Map<Object, Object> findVendorsForEachCategory(Set<Category>
categories) {
Iterable<Long>
ids=categories.stream().map(c->c.getId()).collect(Collectors.toList());
HashSet<Category> matches = new HashSet<Category>(
categoryRepo.findAllById(ids));
Map<Object, Object>
vendors=matches.stream().collect(Collectors.toMap(c->c.getId(),c->c.getVendors()));
return vendors;
}
--Vendor object (trimmed)
@Entity
@Table(name="vendor")
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class,
property="id")
public class Vendor implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
//bi-directional many-to-many association to Category
@ManyToMany(fetch = FetchType.LAZY)
@JoinTable(
name="vendorCategory"
, joinColumns={
@JoinColumn(name="vendorId", referencedColumnName="id")
}
, inverseJoinColumns={
@JoinColumn(name="categoryId",
referencedColumnName="id")
}
)
private Set<Category> categories;
public Set<Category> getCategories() {
return this.categories;
}
public void setCategories(Set<Category> categories) {
this.categories = categories;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
-------------Category
Entity
@Table(name = "category")
@JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class,
property="id")
public class Category implements Serializable {
private static final long serialVersionUID = 1L;
private String name;
// bi-directional many-to-many association to Vendor
@ManyToMany(mappedBy = "categories")
@JsonBackReference
private Set<Vendor> vendors;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Category() {
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public Set<Vendor> getVendors() {
return this.vendors;
}
public void setVendors(Set<Vendor> vendors) {
this.vendors = vendors;
}
}
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