Search multiple fields with multiple values - ruby-on-rails

Question

So what I have is a model Referent that has multiple attributes for example nom and prenom.
I was able to search each attribute in my model using one search value. But then I tried having one text_field for each attribute so for nom I would have one text_field and for prenom I would have another.
So it would search for all Referent who have that nom and that prenom but I'm not capable of seperating those two search. Right now it just take one of the value and search in both nom and prenom with the same value
View:
<h2>Search Referent</h2>
<%= form_tag(referents_path, :method => "get", id: "search-form") do %>
<%= text_field_tag :search, params[:search], placeholder: "Nom" %>
<%= text_field_tag :search, params[:search], placeholder: "Prenom" %>
<%= submit_tag "Search", class: 'btn btn-info' %>
<% end %>
Controller:
def index
#referents = Referent.all
if params[:search]
#referents = Referent.search(params[:search]).order("created_at DESC")
else
#referents = Referent.all.order("created_at DESC")
end
end
Model:
def self.search(search)
where("nom || prenom ILIKE ?", "%#{search}%")
end
Right now it just seems to take the value of the second text_field and use that for the search. I'm using postgresql.
The full view:
<div class="container">
<h2>Search Referent</h2>
<%= form_tag(referents_path, :method => "get", id: "search-form") do %>
<%= text_field_tag :search_nom, params[:search], placeholder: "Nom" %>
<%= text_field_tag :search_prenom, params[:search], placeholder: "Prenom" %>
<%= submit_tag "Search", class: 'btn btn-info' %>
<% end %>
<h2>List de Referent</h2>
<table class="table table-hover">
<tr>
<th>Nom</th>
<th>Prenom</th>
<th>Titre</th>
<th>Departement</th>
<th>Cellulaire</th>
<th>Bureau</th>
<th>Fax</th>
<th>Courriel</th>
<th>Organisme Referent</th>
</tr>
<% #referents.each do |referent| %>
<tr>
<td><%= referent.nom %></td>
<td><%= referent.prenom %></td>
<td><%= referent.titre %></td>
<td><%= referent.departement %></td>
<td><%= referent.cellulaire %></td>
<td><%= referent.bureau %></td>
<td><%= referent.fax %></td>
<td><%= referent.courriel %></td>
<td><%= link_to referent.organismereferent.nom_organisation, organismereferent_path(referent.organismereferent_id) %></td>
</tr>
<% end %>
</table>
</div>
Error using Ramon answer

Answer 1

I would do it like this
<h2>Search Referent</h2>
<%= form_tag(referents_path, :method => "get", id: "search-form") do %>
<%= text_field_tag :search_nom, params[:search_nom], placeholder: "Nom" %>
<%= text_field_tag :search_prenom, params[:search_prenom], placeholder: "Prenom" %>
<%= submit_tag "Search", class: 'btn btn-info' %>
<% end %>
Controller
def index
#referents = Referent.all
search_nom = params[:search_nom]
search_prenom = params[:search_prenom]
#referents = Referent.search(search_nom, search_prenom).order("created_at DESC")
end
Model
def self.search(search_nom, search_prenom)
where("nom ILIKE ? or prenom ILIKE ?", "%#{search_nom}%", "%#{search_prenom}%")
end