app/views/project_members/_form.html.erb
<%= form_for(@project_member) do |f| %>
<%= render 'shared/errors', object: @project_member %>
<div class="field">
For: <%= f.label :project_id, @project_member.project.name %><br>
<%= f.hidden_field :project_id -%>
</div>
<div class="field">
<%= f.label :user %>
<br>
<%= render partial: 'workbench/elements/forms/ajax_select',
locals: {controller: 'users',
object: 'project_member',
method: 'user_id',
tag_id: 'user_id_for_otu',
display: user_tag(@project_member.user),
size: 40} %>
</div>
<div class="field">
<%= f.check_box :is_project_administrator %> <%= f.label :is_project_administrator %> (sets for all!)
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>