我已经看到了一些类似的问题，但没有任何关于使用Cocoon宝石与Wicked多步形式Gem in Rails。当我有一个has_many关联时，表单保存正常但是当有一个has_one关联（Client has_one doctor）时，记录似乎保存然后删除。花了这么长时间试图解决这个问题但却无法理解为什么会发生这种情况。
class QuotesController < ApplicationController
include Wicked::Wizard
before_action :set_client, only: [:show, :update, :quote_success]
steps :profile, :employment, :general_questions, :indemnity_details, :declarations
def show
@client.build_doctor
@client.old_insurers.build
@client.practice_addresses.build
render_wizard
end
def update
@client.update(client_params)
render_wizard @client
end
def quote_success; end
private
def set_client
current_user = Client.find_by_id(session[:current_user_id])
@client = current_user
end
def finish_wizard_path
if @client.valid?
ClientMailer.new_quote(@client).deliver
ClientMailer.new_quote_user_message(@client).deliver
end
quote_success_path
end
end
def client_params
params.require(:client).permit(:name, :email, :email_confirmation, :phone, :date_required,
:title, :first_name, :last_name, :date_of_birth, :nationality, :reg_body,
practice_addresses_attributes: [:id, :pa_line1, :pa_line2, :pa_line3, :pa_town, :pa_county, :pa_postcode, :other_practices, :_destroy],
old_insurers_attributes: [:id, :insurer, :oi_to, :oi_from, :oi_limit, :oi_excess, :oi_premium, :_destroy],
doctor_attributes: [:id, :gp_locum, :gp_locum_sessions, :gp_locum_locations])
end
end
客户端型号：
class Client < ActiveRecord::Base
has_one :doctor, dependent: :destroy
has_many :practice_addresses, dependent: :destroy
has_many :callbks, inverse_of: :client
has_many :old_insurers, dependent: :destroy
accepts_nested_attributes_for :doctor
accepts_nested_attributes_for :old_insurers, reject_if: :all_blank, allow_destroy: true
accepts_nested_attributes_for :callbks
accepts_nested_attributes_for :practice_addresses, reject_if: :all_blank, allow_destroy: true
end
Doctor Model：
class Doctor < ActiveRecord::Base
belongs_to :client
end
查看有问题的部分：
<%= simple_form_for @client, url: wizard_path do |f| %>
<%= yield f %>
....
<div id="doctors">
<%= f.simple_fields_for :doctor do |gp| %>
<%= render 'doctor_fields', f: gp %>
<% end %>
</div>
Doctor_fields：
<div class="nested-fields">
<div class="panel panel-default">
<div class="panel-heading">
<strong>General Questions - GP</strong>
</div>
<div class="panel-body">
<div class="table-responsive">
<div class=bs-example data-example-id=striped-table>
<table class="table table-striped">
<thead>
<tr>
<th>Are you a:</th>
<th>Yes / No</th>
<th>Number of Sessions per week</th>
<th>Number of Locations</th>
</tr>
<tr>
<td>Locum</td>
<td><%= f.input :gp_locum, as: :radio_buttons, checked: false, label: false %></td>
<td><%= f.input :gp_locum_sessions, label: false, required: false %></td>
<td><%= f.input :gp_locum_locations, label: false, required: false %></td>
</tr>
</div>
</table>
</div>
</div>
记录：
Started GET "/quotes/employment" for ::1 at 2017-03-13 10:27:07 -0300
Processing by QuotesController#show as HTML
Parameters: {"id"=>"employment"}
Client Load (1.6ms) SELECT "clients".* FROM "clients" WHERE "clients"."id" = $1 LIMIT 1 [["id", 47]]
Doctor Load (1.1ms) SELECT "doctors".* FROM "doctors" WHERE "doctors"."client_id" = $1 LIMIT 1 [["client_id", 47]]
Rendered layouts/_quote_page_start.html.erb (2.0ms)
Rendered quotes/_doctor_fields.html.erb (234.4ms)
Rendered quotes/_form.html.erb (364.0ms)
Rendered layouts/_quote_page_mobile.html.erb (0.2ms)
Rendered quotes/employment.html.erb within layouts/application (423.2ms)
Rendered layouts/_shim.html.erb (0.1ms)
Profession Load (1.7ms) SELECT "professions".* FROM "professions" ORDER BY name ASC
Rendered layouts/_header.html.erb (8.6ms)
Rendered layouts/_footer.html.erb (11.4ms)
Completed 200 OK in 1920ms (Views: 1845.1ms | ActiveRecord: 13.7ms)
Started PATCH "/quotes/employment" for ::1 at 2017-03-13 10:27:21 -0300
Processing by QuotesController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"7xvqW6SpbBgKy62zfdPclexYD9cxqNR/F8p+twW87F/vSz/5kmpRMCE59 LcL4taIclWj4ZeVQ6CRasqqy38iNw==", "client"=>{"profession_area"=>"General Practicioner", "profession_area_other"=>"das", "doctor_attributes"=> {"gp_locum"=>"false", "gp_locum_sessions"=>"212", "gp_locum_locations"=>"21"}, "commit"=>"Next", "id"=>"employment"}
Client Load (2.0ms) SELECT "clients".* FROM "clients" WHERE "clients"."id" = $1 LIMIT 1 [["id", 47]]
(0.2ms) BEGIN
Doctor Load (0.5ms) SELECT "doctors".* FROM "doctors" WHERE "doctors"."client_id" = $1 LIMIT 1 [["client_id", 47]]
SQL (0.6ms) INSERT INTO "doctors" ("gp_locum", "gp_locum_sessions", "gp_locum_locations", "client_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23, $24, $25, $26, $27, $28, $29, $30, $31, $32, $33, $34, $35) RETURNING "id" [["gp_locum", "f"], ["gp_locum_sessions", 212], ["gp_locum_locations", 21], ["client_id", 47], ["created_at", "2017-03-13 13:27:21.111656"], ["updated_at", "2017-03-13 13:27:21.111656"]]
(0.7ms) COMMIT
(0.7ms) BEGIN
(0.4ms) COMMIT
Redirected to http://localhost:3000/quotes/general_questions
Completed 302 Found in 38ms (ActiveRecord: 5.1ms)
Started GET "/quotes/general_questions" for ::1 at 2017-03-13 10:27:21 -0300
Processing by QuotesController#show as HTML
Parameters: {"id"=>"general_questions"}
Client Load (0.9ms) SELECT "clients".* FROM "clients" WHERE "clients"."id" = $1 LIMIT 1 [["id", 47]]
Doctor Load (0.4ms) SELECT "doctors".* FROM "doctors" WHERE "doctors"."client_id" = $1 LIMIT 1 [["client_id", 47]]
(0.1ms) BEGIN
SQL (0.8ms) DELETE FROM "doctors" WHERE "doctors"."id" = $1 [["id", 29]]
(0.5ms) COMMIT
任何帮助都会非常感谢!!如果您还有其他需要，请告诉我。
答案 0 :(得分：2)
[注意：关于link_to_add_association和has_one的一般评论]
link_to_add_association将尝试在关联上构建新项目。如果您有has_one关系，这实际上意味着它将替换现有关系（如果有）。
如果您确实需要link_to_add_association，可以尝试以下方法：
= link_to_add_association 'add doctor', @form_obj, :doctor, force_non_association_create: true
（这将建立一个新医生，但不使用该关联，这可能意味着关联中定义的某些默认值不会被复制，但现有的医生不会被覆盖，除非在保存表格后选择）
[更新：在您的情况下]
只需从@client.build_doctor方法中删除show即可。这会在每次呼叫时重新初始化医生。我假设你只想在new方法中使用它。
或者，如果我似乎读得正确，您只有show而没有edit/new做类似
@client.build_doctor unless @client.doctor.present?