app/views/projects/_setting_name.erb
<div class="panel panel-default">
<div class="panel-heading"><b>Change name</b></div>
<div class="panel-body">
<small>This change can be painful and break your applications.</small>
<%= form_for @project, url: '/' + param_user + '/' + @space.name + '/' + @project.name + '/setting/change' do |f| %>
<div class="form-group">
<%= div_for(@project, class: 'form-group col-lg-6') do %>
<label>Name</label>
<div>
<%= f.text_field :name, class: 'form-control', placeholder: 'Username', value: @project.name %>
</div>
<%end%>
<%= div_for(@project, class: 'form-group col-lg-9') do %>
<%= submit_tag 'Change', class: 'btn btn-warning' %>
<%end%>
</div>
<%end%>
</div>
</div>