Enable a post to be edited

lidimayra · lidimayra · commit a4e83e43f496 · 2025-01-10T10:19:22.000Z
- Add post/edit template
- Add logic responsible for updating a post to the controller
- Add a link to edit page to each post displayed in index page
diff --git a/myapp/src/main/java/com/example/myapp/BlogController.java b/myapp/src/main/java/com/example/myapp/BlogController.java
@@ -3,10 +3,7 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.PatchMapping;
-import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
 
@@ -40,14 +37,27 @@ public String showPost() {
     }
 
     @GetMapping("/posts/{postId}/edit")
-    public String editPost() {
+    public String editPost(@PathVariable("postId") long id, Model model) {
+        Post post = postRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("Invalid Post Id:" + id));
+
+        model.addAttribute("post", post);
+
         return "blog/edit";
     }
 
-    @PatchMapping("/posts/{postId}")
-    public String updatePost() {
-        //TODO: logic responsible for updating a post
-        return null;
+    @PostMapping("/posts/{postId}")
+    public String updatePost(@PathVariable("postId") long id, Model model, Post post) {
+        Post recordedPost = postRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("Invalid Post Id:" + id));
+
+        recordedPost.setTitle(post.getTitle());
+        recordedPost.setContent(post.getContent());
+        postRepository.save(recordedPost);
+
+        model.addAttribute("posts", postRepository.findAll());
+        return "blog/index";
+
     }
 
     @DeleteMapping("/posts/{postId}")
diff --git a/myapp/src/main/resources/templates/blog/edit.html b/myapp/src/main/resources/templates/blog/edit.html
@@ -1 +1,17 @@
-<p>Edit Post</p>
+<!DOCTYPE html SYSTEM "http://www.thymeleaf.org/dtd/xhtml1-strict-thymeleaf-4.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
+    <body>
+        <p>Edit Post</p>
+        <form th:method="post"
+              th:action="@{/posts/{id}(id=${post.id})}"
+              th:object="${post}">
+            <label for="title">Title:</label>
+            <input type="text" name="title" size="50" th:field="${post.title}"></input><br/>
+            <label for="content">Content:</label><br/>
+            <textarea name="content" cols="80" rows="5" th:field="${post.content}"></textarea>
+            <br/>
+            <input type="submit"></input>
+        </form>
+    </body>
+</html>
diff --git a/myapp/src/main/resources/templates/blog/index.html b/myapp/src/main/resources/templates/blog/index.html
@@ -10,6 +10,7 @@ <h1>Blog</h1>
 
     <dd>
         <span th:text="${post.content}">Content</span>
+        <a th:href="@{/posts/{id}/edit(id=${post.id})}">Edit</a>
     </dd>
 </dl>
 
