app/views/events/_staff_fields.html.erb
<div class="row col s12" id="" >
<div class="input-field col s5">
<input type="email" class="add_staff_field" placeholder="Enter staff email" id = "staff_field_id"/>
</div>
<div class="input-field col s3 staff_role">
<%= select_tag(:role, options_for_select(@roles))%>
<input type="hidden" id = "staff_id" name = "user_id" />
</div>
<div class="checked_div hide"></div>
<div class="col s4">
<button type="button" id="add_staff" class="btn btn-circle staff_add_btn">
Add Staff
</button>
</div>
</div>