Cocoon 和 has_one 关联

Question

我已经在堆栈溢出和谷歌上搜索过，但没有结果。

我有一个人有近亲

我可以创建一个具有嵌套形式（带有茧）的人，并且它可以完美保存。由于某种原因，当我进入编辑页面时，它会删除关联的 next_of_kin 记录。它呈现填充有记录数据的字段，但数据库中的实际记录被删除。

我的表格

.full-width-row
  = simple_form_for @person, url: {action: action}, wrapper: 'two_column_form' do |f|
    .columns.medium-4
      h4 = heading
    .columns.medium-8
      = f.button :submit, 'Save', class: 'right button tiny radius'

    .columns.medium-12
      .row
        .medium-8.columns
          = f.input :first_name
          = f.input :last_name
          = f.input :email
          br

          h6 Next of Kin
          br
          = f.simple_fields_for :next_of_kin do |nok|
            = render 'next_of_kin_fields', f: nok
          .link
            = link_to_add_association "Add Next of Kin", f, :next_of_kin, class: 'button secondary tiny next_of_kin_button'
          hr

我的 _next_of_kin_fields 部分

.nested-fields
  = f.input :first_name
  = f.input :last_name
  = f.input :relationship, as: :select, collection: NextOfKin::RELATIONSHIP
  = f.input :telephone
  = link_to_remove_association "Remove next of kin", f, class: 'remove-association button tiny alert'

我的人物模型：

class Person < ActiveRecord::Base
  has_one :next_of_kin, dependent: :destroy
  accepts_nested_attributes_for :next_of_kin, allow_destroy: true
end

我的 Next_of_kin 模型：

class NextOfKin < ActiveRecord::Base
  belongs_to :person
  RELATIONSHIP = [ "Mother", "Father", "Brother", "Sister", "Aunt", "Uncle", "Spouse", "Other"]
end

当我访问编辑页面时，如何阻止它删除 next_of_kin 记录？

Answer 1

设置force_non_association_create为link_to_add_association以true避免这种情况

= link_to_add_association "Add Next of Kin", f, :next_of_kin, force_non_association_create: true, class: 'button secondary tiny next_of_kin_button'

Cocoon对此参数的文档：https ://github.com/nathanvda/cocoon#force_non_association_create