From 14ba09b89fa0ce79deb3985bea23c10cb5979c41 Mon Sep 17 00:00:00 2001
From: Struchkov Mark <mark@struchkov.dev>
Date: Sat, 2 Jul 2022 19:08:15 +0300
Subject: [PATCH] update

---
 .../hibernate/nbfe/problem/GeneratePost.java  | 58 +++++++++++++++++++
 .../hibernate/nbfe/problem/domain/Tag.java    |  2 -
 2 files changed, 58 insertions(+), 2 deletions(-)
 create mode 100644 src/main/java/dev/struchkov/example/hibernate/nbfe/problem/GeneratePost.java

diff --git a/src/main/java/dev/struchkov/example/hibernate/nbfe/problem/GeneratePost.java b/src/main/java/dev/struchkov/example/hibernate/nbfe/problem/GeneratePost.java
new file mode 100644
index 0000000..992aba4
--- /dev/null
+++ b/src/main/java/dev/struchkov/example/hibernate/nbfe/problem/GeneratePost.java
@@ -0,0 +1,58 @@
+package dev.struchkov.example.hibernate.nbfe.problem;
+
+import dev.struchkov.example.hibernate.nbfe.problem.domain.Post;
+import dev.struchkov.example.hibernate.nbfe.problem.domain.PostComment;
+import dev.struchkov.example.hibernate.nbfe.problem.domain.Tag;
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.EntityManagerFactory;
+import jakarta.persistence.Persistence;
+
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+import java.util.stream.LongStream;
+
+public class GeneratePost {
+
+    public static void main(String[] args) {
+
+        final EntityManagerFactory emf = Persistence.createEntityManagerFactory("Blog");
+        final EntityManager entityManager = emf.createEntityManager();
+
+        entityManager.getTransaction().begin();
+
+        for (long j = 0; j < 20; j++) {
+            final Tag tag = new Tag();
+            tag.setId(j);
+            tag.setName("Tag " + j);
+            entityManager.merge(tag);
+        }
+
+        entityManager.getTransaction().commit();
+
+        entityManager.getTransaction().begin();
+
+        final List<Tag> tags = entityManager.createQuery("SELECT t FROM Tag t where t.id IN :id", Tag.class)
+                .setParameter("id", LongStream.range(0, 19).boxed().collect(Collectors.toSet()))
+                .getResultList();
+
+        for (int i = 0; i < 50; i++) {
+            final Post post = new Post();
+            post.setTitle("Пост " + i);
+
+            for (int j = 0; j < 1000; j++) {
+                final PostComment postComment = new PostComment();
+                postComment.setReview("Комментарий " + j);
+                post.addComment(postComment);
+            }
+
+            tags.forEach(post::addTag);
+
+            entityManager.merge(post);
+        }
+
+        entityManager.getTransaction().commit();
+
+    }
+
+}
diff --git a/src/main/java/dev/struchkov/example/hibernate/nbfe/problem/domain/Tag.java b/src/main/java/dev/struchkov/example/hibernate/nbfe/problem/domain/Tag.java
index b321125..5d4cfbc 100644
--- a/src/main/java/dev/struchkov/example/hibernate/nbfe/problem/domain/Tag.java
+++ b/src/main/java/dev/struchkov/example/hibernate/nbfe/problem/domain/Tag.java
@@ -1,7 +1,6 @@
 package dev.struchkov.example.hibernate.nbfe.problem.domain;
 
 import jakarta.persistence.Entity;
-import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.Id;
 import lombok.Getter;
 import lombok.Setter;
@@ -12,7 +11,6 @@ import lombok.Setter;
 public class Tag {
 
     @Id
-    @GeneratedValue
     private Long id;
 
     private String name;