Redmine/app/views/users/_memberships.rhtml

<div class="box" style="margin-top: 16px;">
<h3><%= l(:label_project_plural) %></h3>

<% @user.memberships.each do |membership| %>
<% form_tag({ :action => 'edit_membership', :id => @user, :membership_id => membership }, :class => "tabular") do %>
<p style="margin:0;padding-top:0;">
    <label><%= membership.project.name %></label>
    <select name="membership[role_id]">
    <%= options_from_collection_for_select @roles, "id", "name", membership.role_id %>
    </select>
    <%= submit_tag l(:button_change), :class => "button-small" %>
    <%= link_to l(:button_delete), {:action => 'destroy_membership', :id => @user, :membership_id => membership }, :confirm => l(:text_are_you_sure), :post => true, :class => 'icon icon-del' %>
</p>
<% end %>
<% end %>
<hr />
<p>
<label><%=l(:label_project_new)%></label><br/>
<% form_tag({ :action => 'edit_membership', :id => @user }) do %>
<select name="membership[project_id]">
<%= options_from_collection_for_select @projects, "id", "name", @membership.project_id %>
</select>
<select name="membership[role_id]">
<%= options_from_collection_for_select @roles, "id", "name", @membership.role_id %>
</select>
<%= submit_tag l(:button_add) %>
<% end %>
</p>
</div>