我正在按照本教程使用 Wicked gem 创建一个多步骤表单。每个用户都有一个答案(用于存储一组问题答案的模型),我有一个 QuestionnaireController 可以逐步完成用户将回答并存储在 Answer 中的问题。到目前为止,我只有两个步骤,每个步骤都有一个问题(答案表上的布尔列)。当我逐步回答每个问题时,一切都很完美,但是当我提交时没有值我得到:
参数丢失或值为空:答案
我的代码...
答案.rb:
class Answer < ApplicationRecord
belongs_to :user
cattr_accessor :questionnaire_steps do
%w(step_one step_two)
end
attr_accessor :current_step #stores the current questionnaire step
validates :user_id, presence: true
with_options if: -> { required_for_step?(:step_one) } do |step|
step.validates :question_one, inclusion: [true, false]
end
with_options if: -> { required_for_step?(:step_two) } do |step|
step.validates :question_two, inclusion: [true, false]
end
def required_for_step?(step)
# All fields are required if no questionnaire step is present
return true if current_step.nil?
# All fields from previous steps are required if the
# step parameter appears before or we are on the current step
return true if self.questionnaire_steps.index(step.to_s) <= self.questionnaire_steps.index(current_step)
end
end
answers_controller.rb:
class AnswersController < ApplicationController
before_action :setup
def setup
@user = current_user
end
def show
@answer = @user.answer
end
def new
@answer = Answer.new
@answer = @user.build_answer
@answer.save(validate: false)
end
def create
@answer = @user.answer
redirect_to questionnaire_path(@answer, Answer.questionnaire_steps.first)
end
end
问卷_控制器.rb:
class QuestionnaireController < ApplicationController
include Wicked::Wizard
before_action :setup
steps *Answer.questionnaire_steps
def setup
@user = current_user
end
def show
@answer = @user.answer
render_wizard
end
def update
@answer = @user.answer
@answer.update_attributes(answer_params(step))
render_wizard @answer
end
private
def answer_params(step)
permitted_attributes = case step
when "step_one"
[:question_one]
when "step_two"
[:question_two]
end
params.require(:answer).permit(permitted_attributes).merge(current_step: step)
end
end
step_one.html.erb:
<div id="questionnaire" class="container-fluid well inline-headers">
<%= form_for @answer, method: :put, url: wizard_path do |f| %>
<div class="row">
<% if f.object.errors.any? %>
<div id="error_explanation" class="alert alert-dismissible alert-danger" >
<button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
<ul>
<% f.object.errors.each do |attribute, message| %>
<%= content_tag :li, f.object.errors.full_message(attribute, message), :id => "error_#{attribute}" %>
<% end %>
<ul>
</div>
<% end %>
</div>
<div class="row">
<div class="col-md-8 form-group">
<p>Are you any good at this?</p>
</div>
<div class="col-md-4 form-group">
<%= label_tag(:question_one, "Yes") %>
<%= f.radio_button :question_one, true %>
<%= label_tag(:question_one, "No") %>
<%= f.radio_button :question_one, false %>
</div>
</div>
<div class="row">
<div class="col-md-4 col-md-offset-8 form-group">
<p><%= f.submit "Save & Continue", class: "btn btn-warning" %></p>
</div>
</div>
<% end %>
</div>
routes.rb (诚然,我试图用这些来掩饰 ID,但请随意羞辱我以正确的方式这样做):
resources :answers, only: [:show, :new, :create]
get 'user/questionnaire', to: 'answers#show'
get 'user/questionnaire/new', to: 'answers#new'
post 'user/questionnaire/new', to: 'answers#create'
resources :questionnaire
当我选择一个选项并提交时,它会保存到数据库并重定向到下一步,但是如果我在没有选择选项的情况下提交,我会在我期望得到验证错误时得到 param is missing 错误。从服务器日志:
QuestionnaireController#update 处理为 HTML 参数:{"utf8"=>"���", "authenticity_token"=>"J45sG/YIqTaBECgBqNLr9Ys3rJewDK78d/cKHWFHYEIzAaOiTXhgH6evPZKl5LhnSAMnQnA94CXonqriyj0fCQ==", "commit"=>"保存并继续", " =>“step_one”}
我已经尝试了许多潜在的修复,包括从 中删除require(:answer)
,params.require(:answer).permit(permitted_attributes).merge(current_step: step)
这让我得到了我期望的验证错误,但随后不允许保存有效值。在那种情况下,我仍然会在服务器日志中收到以下验证错误:
在 2016-12-08 23:26:14 +0545 由 QuestionnaireController#update 作为 HTML
参数处理 ::1 开始 PUT "/questionnaire/step_one": {"utf8"=>"���", "authenticity_token"= >"RWAHfu0BE82ik6gTChh3nmtuyOUa5j0qiz4H03ejIkRR78jHVnHa5IQsvYAHLiQMqFpDMNrXc/MUV6cs3NldDw==", "answer"=>{"question_one"=>"true"}, "commit"=>"保存并继续", "id"=>"step_one"} ...SQL。 .. 不允许的参数:utf8、_method、authenticity_token、answer、commit、id
非常感谢您帮助新手。
更新:我修改了我的路线以匹配教程(嵌套),认为这可能与它有关(即可能没有得到答案 ID)但我仍然收到 param is missing 错误。
resources :answers, only: [:show, :new, :create] do
resources :questionnaire, only: [:show, :update], controller: 'questionnaire'
end
get 'user/questionnaire', to: 'answers#show'
get 'user/questionnaire/new', to: 'answers#new'
post 'user/questionnaire/new', to: 'answers#create'
我还尝试在提交之前添加一个 hidden_field_tag,如下所示:
<%= hidden_field_tag(:answer, @answer) %>
但后来我得到:
未定义的方法 `permit' for #
可能是因为当强参数声明需要散列时, hidden_field_tag 将 @answer.attributes 作为字符串传递。从服务器:
在 2016-12-12 13:25:19 +0545 由 QuestionnaireController#update 作为 HTML 参数处理: {"utf8"=>"����", "authenticity_token"=>"wlLpKoMvqgyfwB5gyP/qubR4ZpZa6jm9KHeMuiwJTc6IOJZi9PgiSegvF+OzlN09ctEuxuxiAuRs+/B2InRGhA==", "answer"=>"{\"id\"=>46, \"user_id\"=>4, \"question_one\"=>nil , \"question_two\"=>nil, \"percentage_complete\"=>#, \"completed\"=>false, \"created_at\"=>Mon, 12 Dec 2016 02:12:31 EST -05:00 , \"updated_at\"=>2016 年 12 月 12 日星期一 02:12:31 EST -05:00}", "commit"=>"保存并继续", "answer_id"=>"46", "id"= >"第一步”}
请帮忙!