編輯/更新操作不起作用。Rails編輯/更新操作不適用於嵌套模型(has_many:through)
我有三個型號:
document.rb
belongs_to :languages
has_many :configuration_documents
has_many :document_catalogs, through: :configuration_documents
accepts_nested_attributes_for :document_catalogs
accepts_nested_attributes_for :configuration_documents
document_catalog.rb
has_many :configuration_documents
has_many :documents, through: :configuration_documents
configuration_document.rb
belongs_to :document
belongs_to :document_catalog
這是我new
方法上documents_controller.rb:
def new
@document = Document.new
@all_documents = DocumentCatalog.all
@configuration_document = @document.configuration_documents.build
end
這是我創建documents_controller.rb版本1法(有了這個代碼,我可以創建文檔)。
def create
@document = Document.new(document_params)
params[:document_catalogs][:id].each_line do |document|
if !document.empty?
@document.configuration_documents.build(:document_catalog_id => document)
end
end
respond_to do |format|
if @document.save
format.html { redirect_to admin_document_path(@document), notice: 'Document was successfully created.' }
format.json { render :show, status: :created, location: @document }
else
format.html { render :new }
format.json { render json: @document.errors, status: :unprocessable_entity }
end
end
end
使用上面的代碼創建,我有這樣的錯誤,當我嘗試編輯:
undefined method `model_name' for nil:NilClass on `<%= fields_for (@configuration_document) do |dc|%>`
這是我對documents_controller 2版創建動作代碼:
def create
@document = Document.new(document_params)
if params[:document_catalogs][:id]
params[:document_catalogs][:id] = params[:document_catalogs][:id].reject(&:empty?).map(&:to_i)
params[:document_catalogs][:id].each do |document|
@miniature.configuration_documents.build(:document_catalogs_id => document)
end
end
respond_to do |format|
if @document.save
format.html { redirect_to admin_document_path(@document), notice: 'Document was successfully created.' }
format.json { render :show, status: :created, location: @document }
else
format.html { render :new }
format.json { render json: @document.errors, status: :unprocessable_entity }
end
end
end
注:當我使用上面的代碼進行更新,即使是「新」不工作,我上了創建操作此錯誤:
NoMethodError - undefined method `reject' for "2":String:
params[:document_catalogs][:id] = params[:document_catalogs][:id].reject(&:empty?).map(&:to_i)
這是documents_controller我的更新方法.RB:
def update
@document = Document.find(params[:id])
if params[:document_catalogs][:id]
params[:document_catalogs][:id] = params[:document_catalogs][:id].reject(&:empty?).map(&:to_i)
old_documents_catalogs = @document.configuration_documents.pluck(:document_catalog_id)
new_dcos = params[:document_catalogs][:id] - old_documents_catalogs
old_documents_catalogs = old_documents_catalogs - params[:document_catalogs][:id]
new_dcos.each do |dc|
@document.configuration_documents.build(:document_catalog_id => dc)
end
ConfigurationDocument.delete_all(:document_catalog_id => old_documents_catalogs)
end
if @document.update_attributes(document_params)
flash[:success] = "document updated"
redirect_to @document
else
render 'edit'
end
end
如果我離開就像普通的支架更新。我得到的錯誤:
undefined method `model_name' for nil:NilClass on `<%= fields_for (@configuration_document) do |dc|%>
「文檔格式」的相關部分:
<div class="form-group">
<%= fields_for (@configuration_document) do |dc|%>
<%= collection_select(:document_catalogs, :id, @all_documents, :id, :name, {}, class: 'form-control')%>
<% end %>
</div>
我真的知道這是一個很大的事情。但基本上,如果我使用「創建」版本之一,我可以創建但不能編輯/更新
如果我使用創建的第二版,我無法創建,編輯/更新。
問候。
請注意'update_attributes'的行爲已經改變。你使用的是什麼版本的Rails?你是如何實現編輯行爲的?另外,請編輯你的問題,使其真正清楚你在問什麼。減少到一個版本的代碼,所以我們有一個堅實的分析基礎。 – Raffael