app/views/customer/contact_informations/_contact_information.html.erb
<table class="table" style="width: 300px;">
<tbody>
<tr>
<th>Email</th>
<td><%= current_customer_user.email %></td>
</tr>
<tr>
<th>Firstname</th>
<td><%= current_customer_user.firstname %></td>
</tr>
<tr>
<th>Lastname</th>
<td><%= current_customer_user.lastname %></td>
</tr>
<tr>
<th>Address</th>
<td><%= current_customer_user.address %></td>
</tr>
<tr>
<th>Postcode</th>
<td><%= current_customer_user.postcode %></td>
</tr>
<tr>
<th>City</th>
<td><%= current_customer_user.city %></td>
</tr>
<tr>
<th>Phone number</th>
<td><%= current_customer_user.phone %></td>
</tr>
<tr>
<th>Date of Birth</th>
<td><%= current_customer_user.date_of_birth %></td>
</tr>
<tr>
<th>Gender</th>
<% if current_customer_user.gender == "male" %>
<td>Male</td>
<% elsif current_customer_user.gender == "female" %>
<td>Female</td>
<% else %>
<td>Not Defined</td>
<% end %>
</tr>
</tbody>
</table>