diff --git a/app/models/post.rb b/app/models/post.rb
index 3157d1a..17d9af6 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -28,10 +28,10 @@ class Post < ApplicationRecord
   end
 
   def limit_of_post_per_day
-    posts_from_day = user.posts.where('created_at >= ?', Time.zone.now.beginning_of_day)
+    posts_from_day = user&.posts&.where('created_at >= ?', Time.zone.now.beginning_of_day)
 
-    if posts_from_day.count >= 5
-      errors.add(:base, 'You can post only 5 posts per day')
-    end
+    return if posts_from_day && posts_from_day.count < 5
+
+    errors.add(:base, 'You can post only 5 posts per day')
   end
 end
diff --git a/spec/requests/posts_spec.rb b/spec/requests/posts_spec.rb
index da2237d..c76ef02 100644
--- a/spec/requests/posts_spec.rb
+++ b/spec/requests/posts_spec.rb
@@ -24,7 +24,7 @@ RSpec.describe "/posts", type: :request do
 
   let(:invalid_attributes) {
     {
-        content: "Quo dolorem recusandae. Vero laborum deleniti. Qui ipsam illum."
+      content: "Quo dolorem recusandae. Vero laborum deleniti. Qui ipsam illum."
     }
   }