编辑表格从数据库中删除一条记录
Edit Form Delete's a record from the database
我有一个嵌套表单，可以很好地将内容保存到数据库中。唯一的问题是，当我单击编辑时，"grand-child" 字段已从数据库中删除，因此我必须重新输入该字段中的所有内容。正常行为是编辑之前的内容应该存在。
我对嵌套表单使用 gem cocoon，对我的表单使用 simple_forms，对富文本编辑使用 ckeditor。
这是我单击编辑时的服务器日志：注意：SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = [["id", 53]] 每次我在考试模型中的任何条目上单击编辑时都会发生这种情况。另请注意，该问题已被选中但未被删除。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" = LIMIT 1 [["id", 24]]
Question Load (0.4ms) SELECT "questions".* FROM "questions" WHERE "questions"."exam_id" = [["exam_id", 24]]
Response Load (0.4ms) SELECT "responses".* FROM "responses" WHERE "responses"."question_id" = LIMIT 1 [["question_id", 44]]
(0.1ms) BEGIN
SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = [["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
问题模型
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部分
= 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"=>"<table border=\"1\" cellpadding=\"1\" cellspacing=\"1\" style=\"width: 500px;\">\r\n\t<tbody>\r\n\t\t<tr>\r\n\t\t\t<td>blalal</td>\r\n\t\t\t<td>nalndjksl</td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t\t<td>sdfjsdljfl</td>\r\n\t\t\t<td>kjfskldjfksl</td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t\t<td>kdfjkdjf</td>\r\n\t\t\t<td>gldjkgldfj</td>\r\n\t\t</tr>\r\n\t</tbody>\r\n</table>\r\n\r\n<p>htkathiuerwehjr uyewuyrhjewhr ;aueryaueh rw erkjwherw</p>\r\n", "response_attributes"=>{"_destroy"=>"false", "answer"=>"<p><img alt=\"\" src=\"/uploads/ckeditor/pictures/1/content_hand_wrinting.gif\" style=\"width: 721px; height: 370px;\" /></p>\r\n"}, "id"=>"44"}}, "unit_id"=>"4"}, "commit"=>"Save", "id"=>"24"}
编辑期间发送的参数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" = LIMIT 1 [["id", 24]]
Question Load (0.5ms) SELECT "questions".* FROM "questions" WHERE "questions"."exam_id" = [["exam_id", 24]]
Response Load (0.5ms) SELECT "responses".* FROM "responses" WHERE "responses"."question_id" = LIMIT 1 [["question_id", 44]]
(0.2ms) BEGIN
SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = [["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
# 获取 /exams/1/edit
定义编辑
结束
感谢您的帮助！
知道了！！
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
第 = link_to_add_association 'Add Answer', f, :response 行导致了问题。它强制删除以前的答案，以便添加一个新答案，而不是按预期编辑旧答案。
尝试在每个 link_to_add_association 上添加 :force_non_association_create => true。
查看了解更多信息！
我有一个嵌套表单，可以很好地将内容保存到数据库中。唯一的问题是，当我单击编辑时，"grand-child" 字段已从数据库中删除，因此我必须重新输入该字段中的所有内容。正常行为是编辑之前的内容应该存在。
我对嵌套表单使用 gem cocoon，对我的表单使用 simple_forms，对富文本编辑使用 ckeditor。
这是我单击编辑时的服务器日志：注意：SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = [["id", 53]] 每次我在考试模型中的任何条目上单击编辑时都会发生这种情况。另请注意，该问题已被选中但未被删除。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" = LIMIT 1 [["id", 24]]
Question Load (0.4ms) SELECT "questions".* FROM "questions" WHERE "questions"."exam_id" = [["exam_id", 24]]
Response Load (0.4ms) SELECT "responses".* FROM "responses" WHERE "responses"."question_id" = LIMIT 1 [["question_id", 44]]
(0.1ms) BEGIN
SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = [["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
问题模型
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部分
= 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"=>"<table border=\"1\" cellpadding=\"1\" cellspacing=\"1\" style=\"width: 500px;\">\r\n\t<tbody>\r\n\t\t<tr>\r\n\t\t\t<td>blalal</td>\r\n\t\t\t<td>nalndjksl</td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t\t<td>sdfjsdljfl</td>\r\n\t\t\t<td>kjfskldjfksl</td>\r\n\t\t</tr>\r\n\t\t<tr>\r\n\t\t\t<td>kdfjkdjf</td>\r\n\t\t\t<td>gldjkgldfj</td>\r\n\t\t</tr>\r\n\t</tbody>\r\n</table>\r\n\r\n<p>htkathiuerwehjr uyewuyrhjewhr ;aueryaueh rw erkjwherw</p>\r\n", "response_attributes"=>{"_destroy"=>"false", "answer"=>"<p><img alt=\"\" src=\"/uploads/ckeditor/pictures/1/content_hand_wrinting.gif\" style=\"width: 721px; height: 370px;\" /></p>\r\n"}, "id"=>"44"}}, "unit_id"=>"4"}, "commit"=>"Save", "id"=>"24"}
编辑期间发送的参数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" = LIMIT 1 [["id", 24]]
Question Load (0.5ms) SELECT "questions".* FROM "questions" WHERE "questions"."exam_id" = [["exam_id", 24]]
Response Load (0.5ms) SELECT "responses".* FROM "responses" WHERE "responses"."question_id" = LIMIT 1 [["question_id", 44]]
(0.2ms) BEGIN
SQL (0.3ms) DELETE FROM "responses" WHERE "responses"."id" = [["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
# 获取 /exams/1/edit 定义编辑 结束
感谢您的帮助！
知道了！！
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
第 = link_to_add_association 'Add Answer', f, :response 行导致了问题。它强制删除以前的答案，以便添加一个新答案，而不是按预期编辑旧答案。
尝试在每个 link_to_add_association 上添加 :force_non_association_create => true。
查看