app/views/thinkers/_form.html.erb
<%= bootstrap_form_for @thinker do |f| %>
<% if @thinker.errors.any? %>
<div id="error_explanation">
<h2>
<%= pluralize(@thinker.errors.count, "error") %> prohibited
this topic from being saved:
</h2>
<ul>
<% @thinker.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<p>
<%= f.text_field :name, label: 'Name', placeholder: 'last name, first name' %>
</p>
<p>
<%= f.text_field :topic_list, label: 'Topics/Research Areas' %>
</p>
<p>
<%= f.text_field :life_date_birth, label: 'Year of Birth', class: 'form-control', autofocus: true, placeholder: '1850' %>
<%= f.text_field :life_date_death, label: 'Year of Death', class: 'form-control', autofocus: true, placeholder: '1930' %>
</p>
<p>
<%= f.email_field :email %>
</p>
<p>
<%= f.text_field :additional_information, placeholder: 'university, online resources, ...' %>
</p>
<p>
<%= f.submit "Create Thinker" %>
</p>
<% end %>