Add search to post list

app/models/post.rb

@@ -6,4 +6,10 @@ class Post < ApplicationRecord
   validates :title, presence: true, length: { in: 4..64 }
 
   paginates_per 15
+
+  def self.search(s = '')
+    s = s || ''
+    s = sanitize_sql_like(s)
+    where("posts.title ILIKE ? OR posts.description ILIKE ?", "%#{s}%", "%#{s}%")
+  end
 end