Changed the way same data checker works

App/Views/Data/edit_pengumuman.html

@@ -18,11 +18,13 @@
                 </option>
             {% endfor %}
         </select>
+        <input type="hidden" name="old_category" value="{{ post.category }}">
 
         <br>
 
         <label for="content">Konten: </label>
         <textarea name="content" rows="3" cols="30" maxlength="255">{{ post.content }}</textarea>
+        <input type="hidden" name="old_content" value="{{ post.content }}">
 
         <br>
 
@@ -42,11 +44,13 @@
 
         <label for="valid_at">Berlaku dari: </label>
         <input type="date" name="valid_at" value="{{ post.valid_at }}">
+        <input type="hidden" name="old_valid_at" value="{{ post.valid_at }}">
 
         <br>
 
         <label for="expired_at">Berlaku sampai: </label>
         <input type="date" name="expired_at" value="{{ post.expired_at }}">
+        <input type="hidden" name="old_expired_at" value="{{ post.expired_at }}">
 
         <br>