Simple_form & Nested attributes save blank model because of date attributes

Question

Model User

class User < ApplicationRecord
  has_many :experiences, dependent: :destroy
  accepts_nested_attributes_for :experiences, reject_if: :all_blank, allow_destroy: true
end

Model Experience

class Experience < ApplicationRecord
  belongs_to :user
end

My input in the VIEW (_experience_fields_user.html)

<div class="nested-fields">
  <%= f.input :start_date as: :date, discard_day: true, order: [:month, :year], start_year: Date.today.year , end_year: Date.today.year - 37  %>
</div>

=> So, that is displaying 2 fields "Month" and "Year"

If I submit my form, with a empty field the params are:

"expertise"=>"", "start_date(3i)"=>"1", "start_date(2i)"=>"", "start_date(1i)"=>""

My problem: "start_date(3i)"=>"1"

This params is not blank (it's represent the day value which is not displayed on the view), and not permit to completed the condition of nested attributes "reject_if: :all_blank"

There is a way to change the value of a day if month and year is blank? Thx

Answer 1

I finally found a way:

I created a condition for test if another input is empty (in this case company_name)

In my model User:

accepts_nested_attributes_for :experiences, reject_if: :reject_xp, allow_destroy: true

def reject_xp(attributes)
   attributes['start_date(3i)'] == "1" && attributes['company_name'].blank?
end