date range not working - ruby-on-rails

Question

I'm having two issues with the same aspect of my application, the abstract view is this:
The app allows users to view different video clips. On the back-end/admin section the admin can track the views of any particular group of clips. For example, the admin can choose Universal Studios, select a date range: Beginning Date: 2015-01-1, End Date: 2016-01-1 and hit filter, and see the number of total views that Universal received within this range.
The problem is, for one, datepicker is no longer working, so when I click on the date fields, no calendar appears, I manually have to type in the date. And for two, I'm only getting results between furthers: 2015-10-18 and 2016-02-18. When I type in 2015-09-18 or anything earlier it doesn't generate results.
See the code below, and let me know if you need any other code!
Index.html.erb snippit:
<tr>
<td><%= f.text_field :start_date, value: 1.month.ago.strftime('%Y-%m-%d') %></td>
<td><%= f.text_field :end_date, value: Time.now.strftime('%Y-%m-%d') %></td>
<td>
<%= f.submit "Filter", class: "btn btn-danger", data: {disable_with: 'Searching...'} %>
<%= link_to 'Clear Form', '#', id: "clear", class: 'btn btn-default' %>
</td>
</tr>
_impressions.html.erb snippit:
</style>
<div class="clearfix"></div>
<% if #impressions.blank? -%>
<div class="span12"><h1>Nothing found</h1></div>
<% else %>
<div class="alert alert-success">
<div class="">Total Views: <b><%= #impressions.count %></b></div>
<div class="">Percentage to overall views: <b><%= #percentage.round(2) %>%</b></div>
</div>
<table id="table_3" class="table table_output">
<thead>
<tr>
<td class="stat_head">Studio</td>
<td class="stat_head">Film</td>
<td class="stat_head">Clip</td>
<td class="stat_head">User</td>
<td class="stat_head">State</td>
<td class="stat_head">Country</td>
<td class="stat_head">Type</td>
<td class="stat_head">Date</td>
</tr>
</thead>
<tbody>
<% #impressions.each do |impression| -%>
<% #clip = Clip.where(id: impression.impressionable_id).first %>
<% user = User.where(id: impression.user_id).first %>
<tr>
<td><%= link_to #clip.film.studio.name, saas_admin_studio_path(#clip.film.studio) %></td>
<td><%= link_to #clip.film.name, saas_admin_studio_film_path(#clip.film.studio, #clip.film) %></td>
<td><%= link_to #clip.name, saas_admin_studio_film_clips_path(#clip.film.studio ,#clip.film) %></td>
<td><%= user.present? ? (link_to user.username, saas_admin_account_user_path(user.account, user)) : ' - ' %></td>
<td><%= user.present? ? user.account.organization.state : ' - ' %></td>
<td><%= user.present? ? user.account.organization.country_id : ' - ' %></td>
<td><%= user.present? ? user.account.subscription.state : ' - ' %></td>
<td><%= user.present? ? impression.created_at.strftime("%b %e, %Y %l:%M%P") : ' - ' %></td>
</tr>
<% end -%>

Answer 1

Why don't you do something like this :
<%=label_tag :start_date, "Start Date" %>
<input id="datepicker" name="someName" ...any other options>
then :
<script>
$(document).ready(function(){
$("#datepicker").datepicker();
});
</script>
then of course add a similar field for end_date as well.
Note that you must include //= require jquery-ui/datepicker in your application.js