Can't save date time fields to database - ruby-on-rails-5

Question

I have model with date time field after render new view and submit it all fields of model saved to database except date time field even I am using date time picker
Can any body help me to solve this problem
This is the code I am working on:
Interview controller
def new
#interview = Interview.new(:batch_id => #batch.id)
end
def create
#interview = Interview.new(interview_params)
# Save the object
if #interview.save
# If save succeeds, redirect to the index action
flash[:notice]= "تم إنشاء المقابلة بنجاح."
redirect_to(interviews_path(:batch_id => #batch.id))
else
# If save fails, redisplay the form so user can fix problems
render('new')
end
end
Interview new view code
<% #page_title = "إنشاء مقابلة" %>
<div id="content-header">
<div class='header-icon hr-icon'></div>
<h1>المقابلات</h1>
<div class='header-sep'>|</div>
<div class='sub-header'>إنشاء مقابلة</div>
<div id="inner-tab-menu">
<ul>
<li class='themed_bg themed-dark-hover-background'><%= link_to("<< العودة للجدول", interviews_path(:batch_id => #batch.id)) %></li>
</ul>
</div>
</div>
<div id="page-yield">
<div class="iterviews new">
<%= form_for(#interview, :url =>interviews_path(:batch_id => #batch.id)) do |f| %>
<%= render(:partial => 'form', :locals => {:f => f}) %>
<script type="text/javascript">
$(function () {
$('#datetimepicker1').datetimepicker();
locale: 'ar-sa'
});
</script>
<div><%= f.submit("إنشاء مقابلة", :class => 'submit_button') %></div>
<% end %>
</div>
</div>
form code
<div class="label-field-pair">
<div class="right-column">
<label for="student_grade">رقم المقابلة<span class="necessary-field">*</span> </label>
<div class="text-input-bg"><%= f.text_field(:code, style: "width: 240px;") %></div>
</div>
</div>
<div class="label-field-pair">
<div class="right-column">
<label for="student_grade">تاريخ المقابلة<span class="necessary-field">*</span></label>
<div class="text-input-bg" style="direction: ltr; margin: 0 10px 0 0;">
<div class='input-group date' id='datetimepicker1'>
<%= f.datetime_field(:interview_date , class: "form-control", style: "width: 200px;margin: 0;") %>
<span class="input-group-addon">
<span class="glyphicon glyphicon-calendar"></span>
</span>
</div>
</div>
</div>
</div>
<%= f.hidden_field(:batch_id, value: #batch.id) %>

Answer 1

I could find out the solution for this problem, of course the reason was that datetimepicker doesn't understand the values in my fields so what I did is the following:
1- change the numbers in moment-with-locales.js in the 'ar-sa' section from Indian numbers to Arabic numbers.
2- set the format: option to datetimepicker to match model attribute data type format in case it is date type or datetime type
and that's solve my problem