我按照本教程了解嵌套表单（http://railscasts.com/episodes/196-nested-model-form-part-1?autoplay=true）。我必须创建表单/问题/答案。它可以用于表单和问题但是当我想在我的数据库中插入答案时它不起作用。
我尝试了两种创建方法：
def create
@formulaire = current_user.formulaires.new(formulaire_params)
if @formulaire.save
redirect_to @formulaire, notice: "Votre formulaire a bien été crée"
else
render :new
end
end
和＃@ form = Form.new（params [：form]）
我的formulaire_params方法：
def formulaire_params
params.require(:formulaire).permit(:name, :description, questions_attributes: [:id,:nom, :typequestion,
answer_attributes:[:id, :content]]) if params[:formulaire]
end
在我看来，我有一个带有fields_for的表单：带有text_field内容的答案，但我的数据库中没有任何内容。
谢谢
class Formulaire < ActiveRecord::Base
belongs_to :user
has_many :questions, dependent: :destroy
accepts_nested_attributes_for :questions, :reject_if => lambda { |a| a[:nom].blank? }, :allow_destroy => true
validates :name, presence: true
validates :description, presence: true
end
class Question < ActiveRecord::Base
belongs_to :formulaire
has_many :answers, :dependent => :destroy
accepts_nested_attributes_for :answers, :allow_destroy => true
#self.inheritance_column = nil
enum typequestion: [:reponse_courte, :choix_multiple, :choix_simple]
end
当我创建提交表单时的日志：
Started GET "/formulaires/112" for 88.172.93.170 at 2017-12-17 19:49:26 +0000
Cannot render console from 88.172.93.170! Allowed networks: 127.0.0.1, ::1, 127.0.0.0/127.255.255.255
Processing by FormulairesController#show as HTML
Parameters: {"id"=>"112"}
Formulaire Load (0.2ms) SELECT "formulaires".* FROM "formulaires" WHERE "formulaires"."id" = ? LIMIT 1 [["id", 112]]
Question Load (0.2ms) SELECT "questions".* FROM "questions" WHERE "questions"."formulaire_id" = ? [["formulaire_id", 112]]
Answer Load (0.1ms) SELECT "answers".* FROM "answers" WHERE "answers"."question_id" = ? [["question_id", 153]]
Answer Load (0.1ms) SELECT "answers".* FROM "answers" WHERE "answers"."question_id" = ? [["question_id", 154]]
Rendered formulaires/show.html.erb within layouts/application (3.3ms)
User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT 1 [["id", 3]]
Rendered layouts/_navigation.html.erb (3.0ms)
Rendered shared/_message.html.erb (0.2ms)
Rendered layouts/_footer.html.erb (0.2ms)
Completed 200 OK in 82ms (Views: 79.9ms | ActiveRecord: 0.6ms)
当我创建一个新表单
Started GET "/formulaires/new" for 88.172.93.170 at 2017-12-18 09:30:28 +0000
Cannot render console from 88.172.93.170! Allowed networks: 127.0.0.1, ::1, 127.0.0.0/127.255.255.255
Processing by FormulairesController#new as HTML
User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT 1 [["id", 3]]
Rendered formulaires/_form.html.erb (29.2ms)
Rendered formulaires/new.html.erb within layouts/application (30.6ms)
Rendered layouts/_navigation.html.erb (1.2ms)
Rendered shared/_message.html.erb (0.1ms)
Rendered layouts/_footer.html.erb (0.0ms)
Completed 200 OK in 82ms (Views: 75.4ms | ActiveRecord: 0.3ms)
当我提交问题和答案时：
Started POST "/formulaires" for 88.172.93.170 at 2017-12-18 09:33:30 +0000
Cannot render console from 88.172.93.170! Allowed networks: 127.0.0.1, ::1, 127.0.0.0/127.255.255.255
Processing by FormulairesController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"YAmDvlvqExWqEKyFUXk+9fEOtFyKw/KJL8fbjfDqOox3w0JqjWRYhf bd4oWSwJXxfVEzuEFsIWOr+vJrF+GoSQ==", "formulaire"=>{"name"=>"aaaaaa", "description"=>"aaaa", "questions_attributes"=>{"0"=>{"nom"=>"aaa", "typequestion"=>"reponse_courte", "_destroy"=>"0"}, "1"=>{"nom"=>"aaa", "typequestion"=>"reponse_courte", "_destroy"=>"0"}}, "answers"=>{"content"=>"aaaa"}}, "commit"=>"Valider le formulaire"}
User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT 1 [["id", 3]]
Unpermitted parameter: _destroy
Unpermitted parameter: _destroy
Unpermitted parameter: answers
(0.1ms) begin transaction
SQL (0.4ms) INSERT INTO "formulaires" ("name", "description", "user_id", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?) [["name", "aaaaaa"], ["description", "aaaa"], ["user_id", 3], ["created_at", "2017-12-18 09:33:30.509450"], ["updated_at", "2017-12-18 09:33:30.509450"]]
SQL (0.1ms) INSERT INTO "questions" ("nom", "typequestion", "formulaire_id", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?) [["nom", "aaa"], ["typequestion", 0], ["formulaire_id", 114], ["created_at", "2017-12-18 09:33:30.511078"], ["updated_at", "2017-12-18 09:33:30.511078"]]
SQL (0.1ms) INSERT INTO "questions" ("nom", "typequestion", "formulaire_id", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?) [["nom", "aaa"], ["typequestion", 0], ["formulaire_id", 114], ["created_at", "2017-12-18 09:33:30.512317"], ["updated_at", "2017-12-18 09:33:30.512317"]]
(9.0ms) commit transaction
Redirected to https://projetx-hakimghanem.c9users.io/formulaires/114
Completed 302 Found in 24ms (ActiveRecord: 10.0ms)
Started GET "/formulaires/114" for 88.172.93.170 at 2017-12-18 09:33:31 +0000
Cannot render console from 88.172.93.170! Allowed networks: 127.0.0.1, ::1, 127.0.0.0/127.255.255.255
Processing by FormulairesController#show as HTML
Parameters: {"id"=>"114"}
Formulaire Load (0.2ms) SELECT "formulaires".* FROM "formulaires" WHERE "formulaires"."id" = ? LIMIT 1 [["id", 114]]
Question Load (0.1ms) SELECT "questions".* FROM "questions" WHERE "questions"."formulaire_id" = ? [["formulaire_id", 114]]
Answer Load (0.1ms) SELECT "answers".* FROM "answers" WHERE "answers"."question_id" = ? [["question_id", 156]]
Answer Load (0.1ms) SELECT "answers".* FROM "answers" WHERE "answers"."question_id" = ? [["question_id", 157]]
Rendered formulaires/show.html.erb within layouts/application (2.0ms)
User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT 1 [["id", 3]]
Rendered layouts/_navigation.html.erb (2.2ms)
Rendered shared/_message.html.erb (0.1ms)
Rendered layouts/_footer.html.erb (0.0ms)
Completed 200 OK in 54ms (Views: 52.2ms | ActiveRecord: 0.5ms)