Ruby on Railsで検索機能を実装

application.html

<%= form_tag("/posts/search", :method => 'get', :class => 'form') do %>
<div class="search-form">
<%= text_field_tag :search, '', class: 'search-input' %>
<%= submit_tag "検索", :name => nil, class: 'search-btn' %>
</div>
<% end %>

posts_controller.rb

def search
    @posts = Post.search(params[:search])
  end

post.rb

def self.search(search)
        if search
          Post.where('name LIKE? OR gender LIKE? OR country LIKE? OR job LIKE? OR content LIKE?',
                    "%#{search}%", "%#{search}%", "%#{search}%", "%#{search}%", "%#{search}%")
        else
          Post.all
        end
    end

search.html.erb

            <% @posts.each do |post| %>
            <div class="img-link">
                <a href="<%= "/posts/#{post.id}" %>" class="thumb-link">
                    <div>
                        <img src="<%= "/images/#{post.image}" %>" class="thumb-img">
                        <div class="thumb-name"><%= post.name %></div>
                    </div>    
                </a>
            </div>    
            <% end %>