NoMethodError in StaticPages#home when attempting to list database query - html

Question

Ruby noob here, I created a search form and I am trying to query a db and display the results. I am getting NoMethodError in StaticPages#home
along with....
/home/action/Projects/CodonCoderTest5/app/views/static_pages/home.html.erb where line #4 raised:
undefined method `each' for nil:NilClass
Where am I going wrong?
layouts/StaticPages/home
<h1>StaticPages#home</h1>
<% #data_bases.each do |list| %>
<div class="list">
<h1 class="list-mrnaCodon"><%= link_to list.mrnaCodon %></h1>
</div>
<% end %>
controller
class DataBaseController < ApplicationController
def new
end
def index
if params[:search]
#data_bases = Match.search(params[:search]).order("created_at DESC")
else
#data_bases = Match.order("created_at DESC")
end
end
end

Answer 1

The error means that #data_bases in your view is evaluating to nil. That makes sense, since the only way the view for StaticPages#home would have access to that variable is if it were set in the corresponding controller action (i.e. the home method on the StaticPagesController). Looks like you're only setting that variable on the DataBaseController.
class StaticPagesController < ApplicationController
...
def home
if params[:search]
#data_bases = Match.search(params[:search]).order("created_at DESC")
else
#data_bases = Match.order("created_at DESC")
end
end
...
end