simple example for implementing a search in Rails

search_example.rb

class SearchController
  # GET /search/new
  def new
    # add the search form here with form_for @posts. 
    # the view is placed in app/views/search/new.html.erb
    @posts = Posts.new
  end
  
  # here you request the posts table with the given param from the search form
  # but before check what you have received, so that there is only a string
  # you can work with (you are not implementing a full text search here!)
  # the view is placed in app/views/search/create.html.erb
  # POST /search/create
  def create
    query_id = query_id_from_params(params)
    unless query_id.blank?
      @post = Posts.find(query_id)
      redirect_to(@post) # this will redirect to show
    else
      # show the new page again because there was no result
      # you can add a message with the flash mechanism
      render :new 
    end
  end
  
  # GET /search/show/1
  def show
    @posts = Posts.find(params[:id])
    # your result page
  end
  
  private
  
  # this method should be place in a SearchModel or sth. like that
  def query_id_from_params(params)
    # check the string from params[:search_field] and return it or e.g. an empty string 
  end
end