Setting up pagination with will_paginate properly - ruby-on-rails

Question

I have been trying to setup pagination properly but I am having trouble following any tutorial and getting it to work properly.
What I basically want setup is that when a user chooses the number of companies they want to appear on a page, the following loop with paginate the given number of companies on each page. If the user doesn't choose a specific number of companies/page, there would be a default value that would be set.
If anyone could maybe give me a push in the right direction, that would be much appreciated.
View
<ul class="list-group">
<%= #comps.find_each do |comp| %>
<li class="list-group-item">
<div class="row">
<div class="span12">
<p style="font-size: 1.5em"><strong><%= link_to comp.name, comp %></strong></p>
<hr class="divider">
<div class="row">
<div class="span6">
<p><strong>Primary Field:</strong> <%= comp.primary_field %></p>
<p><strong>Description:</strong> <%= truncate(comp.description, length: 150) { link_to "Read More", comp, :target => "_blank"}%>
</p>
</div>
<div class="span5">
<% if signed_in? %>
<p><% if !(current_user.favorites.include? comp) %>
<%= link_to 'Favorite',
favorite_company_path(comp, type: "favorite"),
class: "btn btn-primary",
method: :put%>
<% else %>
<%= link_to 'Unfavorite',
favorite_company_path(comp, type: "unfavorite"),
class: "btn btn-danger",
method: :put%>
<% end %></p>
<% end %>
<p><strong>Website:</strong> <%= auto_link(comp.website, :html => { :target => '_blank' })%></p>
<p><strong>Location:</strong> <%= comp.address %></p>
</div>
</div>
</div>
</div>
</li>
<% end %>
<%= will_paginate #comps%>
</ul>
Controller (Where the list page is handled)
def filter
if ((params[:field] != "") and (params[:field] != "All Fields") and (params[:field] != nil))
# This will apply the filter
#comps = Company.where(primary_field: params[:field])
else
# This will return all records
#comps = Company.all
end
end
def list
#fields = ##primary_field
filter
#comps = #comps.paginate(:page => params[:page], :per_page => params[:number_of_companies] ||= 5)
end
Model for the list page
class DynamicPages < ActiveRecord::Base
self.per_page = 5
end

Answer 1

Since you are using will_paginate. You could do in this way.
Post.paginate(:page => params[:page], :per_page => params[:number_of_companies] ||= 10)
Here params[:number_of_companies] is the number of companies a user has selected and 10 is the
default page value.
class Post
self.per_page = 10
end
Also, your code snippet <%= #comps.find_each do |comp| %>, should be this <% %> instead of <%= %>