Three forms for one object in a modal - ruby-on-rails

Question

I have a webpage with a list of offices. Currently I'm trying to make three forms for editing/adding/deleting an office. This is what I have:
A model:
class ChangeOfficeAddress < ApplicationRecord
belongs_to :office
belongs_to :insurer
belongs_to :city
VALID_EMAIL_REGEX = /\A[\w+\-.]+#[a-z\d\-.]+\.[a-z]+\z/i
validates_presence_of :email
validates_format_of :email, with: VALID_EMAIL_REGEX
validates_presence_of :edit_office_address
validates_presence_of :add_office_address
validates_presence_of :delete_office_address
validates_presence_of :city_id
validates_presence_of :insurer_id
validates_presence_of :name
end
In a view I have my modals in partials:
<div id="addModal" class="modal fade" role="dialog" tabindex="-1" aria-hidden="true">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<div class="text-center">
<div class="btn-group topbar header-buttons" role="group" aria-label="...">
<%= link_to 'Add', '#', class: 'btn btn-default disabled' %>
<%= link_to 'Edit', '#editModal', { 'class' => 'btn btn-default', 'data-toggle' => 'modal', 'data-dismiss' => 'modal' } %>
<%= link_to 'Delete', '#deleteModal', { 'class' => 'btn btn-default', 'data-toggle' => 'modal', 'data-dismiss' => 'modal' } %>
</div>
</div>
</div>
<div class="modal-body">
<%= form_for (#change_office_address), remote: true, format: :json, html: { class: :contact_form } do |f| %>
<div id="error_explanation" style='display:none;' class="bg-danger text-danger alert fade in alert-danger alert-dismissable errors">
<ul>
<% if #change_office_address.errors.any? %>
<% #change_office_address.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
<% end %>
</ul>
</div>
<%= f.text_field :name, placeholder: 'Name', class: 'form-control' %>
<br>
<%= f.text_field :email, placeholder: 'e-mail', class: 'form-control' %> <br>
<%= f.label :city_id %>
<%= f.collection_select :city_id, City.order(:name), :id, :name,
{ include_blank: true }, { class: 'form-control' } %>
<br>
<%= f.label :insurer_id, 'Insurer' %>
<%= f.collection_select :insurer_id, Insurer.order(:short_name), :id, :short_name,
{ include_blank: true }, { class: 'form-control' } %>
<br>
<%= f.text_area :add_office_address, placeholder: 'Add address', class: 'form-control', cols: '30',
rows: '5' %> <br>
<div class="text-center">
<%= f.submit, class: 'btn btn-default' %>
</div>
<% end %>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
And two other modals, the only differences between them is that :add_office_address is substituted with :edit_office_address and :delete_office_address.
When there are no validations in the model, the form submits, and everything is Ok, but when I add validations to :add_office_address, :edit_office_address and :delete_office_address, the validation doesn't pass, cause these fields(I mean :edit_office_address, :delete_office_address or :add_office_address) are blank.
How can I make different forms? Thanks ahead!

Answer 1

For some context, what are the reasons for different fields for [add|edit|delete]_office_address?
However, to solve your issue, you should probably do something like:
class ChangeOfficeAddress < ApplicationRecord
belongs_to :office
belongs_to :insurer
belongs_to :city
VALID_EMAIL_REGEX = /\A[\w+\-.]+#[a-z\d\-.]+\.[a-z]+\z/i
validates_presence_of :email
validates_format_of :email, with: VALID_EMAIL_REGEX
validates_presence_of :edit_office_address, if: :edit_office_address_changed?
validates_presence_of :add_office_address, if: :add_office_address_changed?
validates_presence_of :delete_office_address, if: :delete_office_address_changed?
validates_presence_of :city_id
validates_presence_of :insurer_id
validates_presence_of :name
end
Let me know if that works.