app/views/messages/_receiver.html.erb
<% @messages.each do |message| %>
<% if message.body %>
<% user = User.find(message.user) %>
<div style="text-align:left">
<% if !@last_user.id.eql? user.id %>
<div style="text-align:center">
<small class="text-muted"><%= message.message_time %></small>
</div>
<b class="message-username"> <%= user.username %></b>
<% end %>
<div class="message-container">
<div class="message" id="other-message"><%= message.body %></div>
</div>
</div>
<%end%>
<%end%>