From 29653322f755659d8aeeca404dd84739b085164a Mon Sep 17 00:00:00 2001
From: Janis Blatsios <janis666@gmail.com>
Date: Fri, 7 Jun 2024 09:36:22 +0200
Subject: [PATCH] json managed references

---
 src/main/java/pl/janis/komornik/entities/Category.java | 2 ++
 src/main/java/pl/janis/komornik/entities/Debt.java     | 4 ++--
 src/main/java/pl/janis/komornik/entities/Expense.java  | 7 ++++---
 src/main/java/pl/janis/komornik/entities/Group.java    | 2 ++
 src/main/java/pl/janis/komornik/entities/User.java     | 8 ++++----
 5 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/main/java/pl/janis/komornik/entities/Category.java b/src/main/java/pl/janis/komornik/entities/Category.java
index 2f1c844..7991fc6 100644
--- a/src/main/java/pl/janis/komornik/entities/Category.java
+++ b/src/main/java/pl/janis/komornik/entities/Category.java
@@ -1,5 +1,6 @@
 package pl.janis.komornik.entities;
 
+import com.fasterxml.jackson.annotation.JsonManagedReference;
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -31,6 +32,7 @@ public class Category {
     private String categoryIconName;
 
     @OneToMany(mappedBy = "category")
+    @JsonManagedReference
     @ToString.Exclude
     private Set<Expense> expenses = new LinkedHashSet<>();
 
diff --git a/src/main/java/pl/janis/komornik/entities/Debt.java b/src/main/java/pl/janis/komornik/entities/Debt.java
index a49276e..d3822fc 100644
--- a/src/main/java/pl/janis/komornik/entities/Debt.java
+++ b/src/main/java/pl/janis/komornik/entities/Debt.java
@@ -1,6 +1,6 @@
 package pl.janis.komornik.entities;
 
-import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonBackReference;
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -26,7 +26,7 @@ public class Debt {
 
     @ManyToOne(fetch = FetchType.LAZY, optional = false, cascade = CascadeType.MERGE)
     @JoinColumn(name = "expense_id")
-    @JsonIgnore
+    @JsonBackReference
     @ToString.Exclude
     private Expense expense;
 
diff --git a/src/main/java/pl/janis/komornik/entities/Expense.java b/src/main/java/pl/janis/komornik/entities/Expense.java
index 2deb281..97814d4 100644
--- a/src/main/java/pl/janis/komornik/entities/Expense.java
+++ b/src/main/java/pl/janis/komornik/entities/Expense.java
@@ -1,7 +1,7 @@
 package pl.janis.komornik.entities;
 
+import com.fasterxml.jackson.annotation.JsonBackReference;
 import com.fasterxml.jackson.annotation.JsonFormat;
-import com.fasterxml.jackson.annotation.JsonIgnore;
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -42,6 +42,7 @@ public class Expense {
 
     @ManyToOne(fetch = FetchType.EAGER, cascade = {CascadeType.MERGE})
     @JoinColumn(name = "category_id")
+    @JsonBackReference
     private Category category;
 
     @Column(name = "currency", nullable = false)
@@ -54,12 +55,12 @@ public class Expense {
     private BigDecimal amount;
 
     @OneToMany(fetch = FetchType.EAGER, mappedBy = "expense", cascade = CascadeType.ALL, orphanRemoval = true)
-    @ToString.Exclude
+    @JsonBackReference
     private List<Debt> debt;
 
     @ManyToOne(fetch = FetchType.LAZY, optional = false, cascade = {CascadeType.MERGE})
     @JoinColumn(name = "group_id", nullable = false)
-    @JsonIgnore
+    @JsonBackReference
     @ToString.Exclude
     private Group group;
 
diff --git a/src/main/java/pl/janis/komornik/entities/Group.java b/src/main/java/pl/janis/komornik/entities/Group.java
index f970663..910a43e 100644
--- a/src/main/java/pl/janis/komornik/entities/Group.java
+++ b/src/main/java/pl/janis/komornik/entities/Group.java
@@ -1,5 +1,6 @@
 package pl.janis.komornik.entities;
 
+import com.fasterxml.jackson.annotation.JsonManagedReference;
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -37,6 +38,7 @@ public class Group {
     private String groupIconName;
 
     @OneToMany(mappedBy = "group")
+    @JsonManagedReference
     @ToString.Exclude
     private List<Expense> expenses;
 
diff --git a/src/main/java/pl/janis/komornik/entities/User.java b/src/main/java/pl/janis/komornik/entities/User.java
index 7cb99ee..f5a0a0f 100644
--- a/src/main/java/pl/janis/komornik/entities/User.java
+++ b/src/main/java/pl/janis/komornik/entities/User.java
@@ -1,6 +1,6 @@
 package pl.janis.komornik.entities;
 
-import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonManagedReference;
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -44,17 +44,17 @@ public class User implements UserDetails {
     private Boolean isVerified;
 
     @ManyToMany(mappedBy = "users")
-    @JsonIgnore
+    @JsonManagedReference
     @ToString.Exclude
     private List<Group> groups;
 
     @OneToMany(mappedBy = "userFrom", cascade = CascadeType.ALL)
-    @JsonIgnore
+    @JsonManagedReference
     @ToString.Exclude
     private List<Debt> debtFrom;
 
     @OneToMany(mappedBy = "userTo", cascade = CascadeType.ALL)
-    @JsonIgnore
+    @JsonManagedReference
     @ToString.Exclude
     private List<Debt> debtTo;