编辑表单删除数据库中的记录

我有一个嵌套的表单，可以很好地保存数据库的内容。 唯一的问题是，当我单击编辑时，“grand-child”字段将从数据库中删除，因此我必须重新输入该字段上的所有内容。 正常行为是编辑应存在的先前内容。

我正在使用gem cocoon simple_forms用于我的表单的嵌套表单simple_forms和用于ckeditor编辑的ckeditor 。

这是我单击编辑时的服务器日志：通知： SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = $1 [["id", 53]]每次我点击编辑时都会发生进入考试模型。 另请注意，问题已选中但未删除。 很奇怪。

  Started GET "/exams/24/edit" for 127.0.0.1 at 2015-11-09 16:59:40 +0300 Processing by ExamsController#edit as HTML Parameters: {"id"=>"24"} Exam Load (0.8ms) SELECT "exams".* FROM "exams" WHERE "exams"."id" = $1 LIMIT 1 [["id", 24]] Question Load (0.4ms) SELECT "questions".* FROM "questions" WHERE "questions"."exam_id" = $1 [["exam_id", 24]] Response Load (0.4ms) SELECT "responses".* FROM "responses" WHERE "responses"."question_id" = $1 LIMIT 1 [["question_id", 44]] (0.1ms) BEGIN SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = $1 [["id", 53]] (15.3ms) COMMIT Rendered exams/_response_fields.html.haml (2.4ms) Rendered exams/_response_fields.html.haml (2.1ms) Rendered exams/_question_fields.html.haml (32.6ms) Rendered exams/_response_fields.html.haml (0.7ms) Rendered exams/_response_fields.html.haml (0.6ms) Rendered exams/_question_fields.html.haml (8.1ms) 

考试模型考试exam.rb

 belongs_to :unit has_many :questions, :dependent => :destroy has_many :answers, :through => :questions accepts_nested_attributes_for :questions, :reject_if => :all_blank, :allow_destroy => true 

Quesions模型

 belongs_to :exam has_one :response, :dependent => :destroy accepts_nested_attributes_for :response 

响应模型

 class Response < ActiveRecord::Base belongs_to :question end 

_form.html.haml partial

  = simple_form_for @exam do |f| - if @exam.errors.any? #error_explanation %h2= "#{pluralize(@exam.errors.count, "error")} prohibited this exam from being saved:" %ul - @exam.errors.full_messages.each do |msg| %li= msg .field = f.label :Exam_Title = f.text_field :title , size: 100 .field = f.label :date = f.datetime_select :date .field = f.simple_fields_for :questions do |question| = render "question_fields", f: question .links = link_to_add_association 'Add Question', f, :questions .field =f.label :unit =f.select :unit_id, Unit.all.map { |u| [u.name, u.id]} .actions = f.submit 'Save' 

_questions.html.haml部分

  .nested-fields %br/ = f.label :question, "Question" = link_to_remove_association "Remove Question", f %br/ = f.cktext_area :question, :cols => 30, :ckeditor => {:uiColor => '#f7931e', :toolbar => 'mini'} %br/ .link = link_to_add_association 'Add Answer', f, :response = f.fields_for :response do |answer| =render "response_fields", f: answer 

_responses.html.haml部分

 .nested-fields %br/ = f.label :response, "Answer" = link_to_remove_association "Remove Answer", f = f.cktext_area :answer, :cols => 10, :ckeditor => {:uiColor => '#f7931e', :toolbar => 'mini'} 

更新

考试编辑页面只是呈现表格。 edit.html.haml

  %h1 Editing exam = render 'form' = link_to 'Show', @exam \| = link_to 'Back', exams_path 

保存期间发送的参数：

 Parameters: {"utf8"=>"✓", "authenticity_token"=>"OvzRdRYT8zeCz6pTxcJT4o3maLb1TFw7iYxytZmnVkT7ZAG/maxeZLIoizlc8QMIMA4IrZoufh17Xkmt0NvG3A==", "exam"=>{"title"=>"Bla bla bla", "date(1i)"=>"2015", "date(2i)"=>"11", "date(3i)"=>"9", "date(4i)"=>"12", "date(5i)"=>"05", "questions_attributes"=>{"0"=>{"_destroy"=>"false", "question"=>"\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\r\n
blalal
nalndjksl
sdfjsdljfl
kjfskldjfksl
kdfjkdjf
gldjkgldfj
\r\n\r\n
htkathiuerwehjr uyewuyrhjewhr ;aueryaueh rw erkjwherw
\r\n", "response_attributes"=>{"_destroy"=>"false", "answer"=>"
\r\n"}, "id"=>"44"}}, "unit_id"=>"4"}, "commit"=>"Save", "id"=>"24"} 

编辑期间发送的Parameters: {"id"=>"24"}

服务器登录加载编辑页面

  Exam Load (0.9ms) SELECT "exams".* FROM "exams" WHERE "exams"."id" = $1 LIMIT 1 [["id", 24]] Question Load (0.5ms) SELECT "questions".* FROM "questions" WHERE "questions"."exam_id" = $1 [["exam_id", 24]] Response Load (0.5ms) SELECT "responses".* FROM "responses" WHERE "responses"."question_id" = $1 LIMIT 1 [["question_id", 44]] (0.2ms) BEGIN SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = $1 [["id", 59]] (12.1ms) COMMIT Rendered exams/_response_fields.html.haml (2.6ms) Rendered exams/_response_fields.html.haml (2.3ms) Rendered exams/_question_fields.html.haml (44.3ms) Rendered exams/_response_fields.html.haml (0.7ms) Rendered exams/_response_fields.html.haml (0.6ms) Rendered exams/_question_fields.html.haml (10.1ms) 

更新！ exam_controller.rb

 def exam_params params.require(:exam).permit(:title, :attachment, :date, :unit_id, questions_attributes:[ :id, :question, :exam_id, :_destroy, response_attributes:[:id, :answer, :question_id, :_destroy]] # responses:[:id, :response, :question_id, :_destroy]] ) end def new @exam = Exam.new 1.times do @exam.questions.build.build_response end 

结束

#GET /考试/ 1 /编辑def编辑结束

谢谢你的帮助！

Answer 1

得到它了！！

问题出在这里_questions.html.haml

 .nested-fields %br/ = f.label :question, "Question" = link_to_remove_association "Remove Question", f %br/ = f.cktext_area :question, :cols => 30, :ckeditor => {:uiColor => '#f7931e', :toolbar => 'mini'} %br/ .link = link_to_add_association 'Add Answer', f, :response = f.fields_for :response do |answer| =render "response_fields", f: answer 

line = link_to_add_association 'Add Answer', f, :response导致了问题。 它强制删除上一个答案，以便添加一个新答案，而不是按预期编辑旧答案。

Answer 2

尝试在每个link_to_add_association上添加:force_non_association_create => true 。

查看此问题以获取更多信息！