Rails 5 simple search form just won't work

Question

• I have a navbar shared across all views by rendering it in application.html.erb with this form in it:

  <form class="form-inline d-none d-lg-inline-flex">    
    <%= form_tag search_query_path, method: :get do |f| %>
      <%= text_field_tag :query, params[:query], class: "form-control", placeholder: "Search" %>
      <%= submit_tag "Search", name: nil %>
    <% end %>
  </form>
  

• I want to search for similar titles in the Post model.

• The methods are in the PostsController as follows:

  def search_query
    @results = Post.find_by_sql("SELECT * FROM posts WHERE title LIKE '%#{params[:query]}%'")
  end
  
  def search_query_params
    params.require(:post).permit(:query)
  end
  
  private :search_query_params
  

The problem is: the search keeps getting processed by the current controller of the current view. If I'm the the index page (in the PagesController), the query takes place there, just reloading the url like this:

http://localhost:3000/?utf8=%E2%9C%93&query=test+title

I've tried everything and can't find where my logic is wrong.

These are the routes:

get '/search_query', to: 'posts#search_query', as: 'search_query'

Answer 1

form_tag generates a form element, so you are nesting a form inside a form here. Try deleting the outer form.