1. fields_for
- Simple way
<%= form_with(model: rental_form, local: true) do |f| %>
<%= f.fields_for(:terms, rental_form.terms) do |t| %>
<div class="row my-3">
<div class="col-11 mx-auto text-center border shadow">
<h3>Term</h3>
<div class="row">
<div class="col-3 border-right">
Start ~ End
</div>
<div class="col">
<%= t.date_field :start %>
~
<%= t.date_field :end %>
</div>
</div>
</div>
</div>
<% end %>
<% end %>
it needs 2 methods
About the terms_attributes method.
- It should be as a public method.
- It is called from
initializeof the ActiveModel, so you need to include ActiveModel
class Contracts::RentalForm < ApplicationForm
attr_accessor :terms
def terms_attributes=(attributes)
self.terms = attributes.map{ |_, term_attributes|
Contracts::Rentals::Term.new(term_attributes)
}
end
end
class ApplicationForm
include ActiveModel::Model
end
Example of the params
attributes #=> {"0"=>{"id"=>"5", "start"=>"2020-12-23", "end"=>""}, "1"=>{"id"=>"6", "start"=>"2020-12-23", "end"=>""}}
2. manual setting
- You don't need to implement the
terms_attributesmethod.
<% rental_form.terms.each.with_index do |term, index| %>
<div class="row">
<div class="col-3 border-right">
Start ~ End
</div>
<div class="col">
<%= f.date_field "[terms][#{index}][start]" %>
</div>
</div>
<% end %>
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