class CreateEquipment < ActiveRecord::Migration[5.0]
  def change
    create_table :equipment do |t|
      t.string :sitename
      t.string :equipname
      t.string :equipmodel
      t.string :equipmake
      t.string :equiptype
      t.belongs_to :site
      t.timestamps
    end
  end
end


class CreateSites < ActiveRecord::Migration[5.0]
  def change
    create_table :sites do |t|
      t.string :sitename

      t.timestamps
    end
  end
end

class Equipment < ApplicationRecord
end

class Site < ApplicationRecord

    has_many :equipment

end

enter code here

<div class="field">
    <%= f.label :sitename %>
    <%= f.collection_select :sitename, Site.all, :sitename, :sitename, prompt: true %>
  </div>

  <div class="field">
    <%= f.label :equipname %>
    <%= f.text_field :equipname %>
  </div>

  <div class="field">
    <%= f.label :equipmodel %>
    <%= f.text_field :equipmodel %>
  </div>


<div class="field">
    <%= f.label :equipmake %>
    <%= f.text_field :equipmake %>
  </div>
  <div class="field">
    <%= f.label :equiptype %>
    <%= f.text_field :equiptype %>
  </div>

  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

<p>
  <strong>Sitename:</strong>
  <%= @site.sitename %>
</p>

<% @site.equipment.each do |equipment| %>
  <p><%= equipment.equipname %></p>
<% end %>