我添加了将文件上传到名为requests的模型的功能。我有一个名为request_files的二级模型，里面有一个名叫file的载波上传器。
当我创建一个新的请求时，会出现上传按钮，我可以上传文件。如果我上传文件，它们会出现在我的显示和编辑视图中，并且我可以在编辑表单中添加更多文件。如果我在最初创建新的request时不上传文件，则上传按钮不会出现在编辑表单上。我希望new和edit的上传按钮都出现在表单中
这是表单中包含request_files字段的部分：
<div class="clear">
<b>Upload Files:</b>
<%= f.fields_for :request_files do |p| %>
<div class="field">
<%= p.file_field :file, :multiple => true, name: "request_files[file][]" %>
</div>
<% end %>
</div>
<% if params[:controller] == "requests" && params[:action] == "edit" %>
<b>Uploaded Files:</b>
<table class="table">
<% @request.request_files.each do |p| %>
<tr>
<td><%= p.file_url.split("/").last %></td>
<td><%= button_to "Download File", {action: "download", controller: "requests", :file => p.file} %></td>
<!--<td><%= link_to "Delete File", p, method: :delete %></td>-->
</tr>
<% end %>
</table>
<% end %>
这是整个控制器文件：
class RequestsController < ApplicationController
handles_sortable_columns
before_filter :sales_check, only: [:create, :new]
before_filter :admin_check, only: [:destroy]
# GET /requests
# GET /requests.json
def index
order = sortable_column_order, "request_number desc"
if params[:requests].nil?
@requests = Request.paginate page: params[:page], order: order, per_page: 100
else
@requests = Request
.by_request_number(params[:requests][:request_number])
.by_keyword(params[:requests][:description])
.by_regional_sales_mgr(params[:requests][:regional_sales_mgr])
.by_product_line(params[:requests][:product_line])
.by_quote_number(params[:requests][:quote_number])
.by_customer(params[:requests][:customer])
.by_created_before(params[:requests]['created_before(1i)'], params[:requests]['created_before(2i)'], params[:requests]['created_before(3i)'])
.by_created_after(params[:requests]['created_after(1i)'], params[:requests]['created_after(2i)'], params[:requests]['created_after(3i)'])
.paginate page: params[:page], order: order, per_page: 100
end
respond_to do |format|
format.html # index.html.erb
format.json { render json: @requests }
end
end
def index_open
order = sortable_column_order, "request_number desc"
@requests = Request.by_open_requests.by_non_released_requests.paginate page: params[:page], order: order, per_page: 100
respond_to do |format|
format.html { render :template => "requests/index" }
format.json { render json: @requests }
end
end
# GET /requests/1
# GET /requests/1.json
def show
@request = Request.find(params[:id])
@request_files = @request.request_files.all
respond_to do |format|
format.html # show.html.erb
format.json { render json: @request }
end
end
# GET /requests/new
# GET /requests/new.json
def new
@request = Request.new
@request = @request.incrament(@request)
@request_file = @request.request_files.build
respond_to do |format|
format.html # new.html.erb
format.json { render json: @request }
end
end
# GET /requests/1/edit
def edit
@request = Request.find(params[:id])
@request_files = @request.request_files.all
if @request_files.nil?
@request_file = @request.request_files.build
else
end
end
# POST /requests
# POST /requests.json
def create
@request = Request.new(params[:request])
@request = @request.created_status(@request)
respond_to do |format|
if @request.save
params[:request_files]['file'].each do |a|
@request_file = @request.request_files.create!(:file => a, :request_id => @request.id)
end
format.html { redirect_to @request, notice: 'Request was successfully created.' }
format.json { render json: @request, status: :created, location: @request }
else
format.html { render action: "new" }
format.json { render json: @request.errors, status: :unprocessable_entity }
end
end
end
# PUT /requests/1
# PUT /requests/1.json
def update
@request = Request.find(params[:id])
respond_to do |format|
if @request.update_attributes(params[:request])
params[:request_files]['file'].each do |a|
@request_file = @request.request_files.create!(:file => a, :request_id => @request.id)
end
format.html { redirect_to @request, notice: 'Request was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: @request.errors, status: :unprocessable_entity }
end
end
end
# DELETE /requests/1
# DELETE /requests/1.json
def destroy
@request = Request.find(params[:id])
@request.destroy
respond_to do |format|
format.html { redirect_to requests_url }
format.json { head :no_content }
end
end
def submit_eng
@request = Request.find(params[:id])
@email = params[:email]
@message = @email[:message]
@request = @request.eng_status(@request)
@subject = @email[:subject]
@additional_emails = @email[:recipient]
respond_to do |format|
RequestMailer.submit_additional(@request, @message, @additional_emails, @subject).deliver if @additional_emails != ""
RequestMailer.notify_a9(@request, @message, @subject).deliver if @request.product_line == "A9"
RequestMailer.notify_a7(@request, @message, @subject).deliver if @request.product_line == "A7"
RequestMailer.notify_ag(@request, @message, @subject).deliver if @request.product_line == "AG"
RequestMailer.notify_af(@request, @message, @subject).deliver if @request.product_line == "AF"
RequestMailer.notify_S3(@request, @message, @subject).deliver if @request.product_line == "S3"
RequestMailer.notify_legacy(@request, @message, @subject).deliver if @request.product_line == "Legacy"
RequestMailer.notify_kkpro(@request, @message, @subject).deliver if @request.product_line == "K/Kpro"
RequestMailer.notify_emw(@request, @message, @subject).deliver if @request.product_line == "EMW"
RequestMailer.notify_hd(@request, @message, @subject).deliver if @request.product_line == "HD"
RequestMailer.notify_nm(@request, @message, @subject).deliver if @request.product_line == "Non-Metallic"
@request.update_attributes(params[:request])
format.html { redirect_to home_url, alert: "SIR has been submitted to engineering. Please push up the revision level and resubmit if you make any changes." }
format.json { render json: @requests }
end
end
def submit_mfg
@request = Request.find(params[:id])
@email = params[:email]
@message = @email[:message]
@request = @request.mfg_status(@request)
@subject = @email[:subject]
@additional_emails = @email[:recipient]
respond_to do |format|
RequestMailer.submit_additional(@request, @message, @additional_emails, @subject).deliver if @additional_emails != ""
RequestMailer.notify_mfg(@request, @message, @subject).deliver
@request.update_attributes(params[:request])
format.html { redirect_to home_url, alert: "SIR has been submitted to manufacturing. Please resubmit if you make any changes." }
format.json { render json: @requests }
end
end
def reject
@request = Request.find(params[:id])
@email = params[:email]
@message = @email[:message]
@request = @request.reject_status(@request)
@subject = @email[:subject]
@additional_emails = @email[:recipient]
respond_to do |format|
RequestMailer.reject_additional(@request, @message, @additional_emails, @subject).deliver if @additional_emails != ""
RequestMailer.reject(@request, @message, @subject).deliver
@request.update_attributes(params[:request])
format.html { redirect_to home_url, alert: "SIR has been returned to sales marked as incomplete." }
format.json { render json: @requests }
end
end
def submit_acct
@request = Request.find(params[:id])
@email = params[:email]
@message = @email[:message]
@request = @request.acct_status(@request)
@subject = @email[:subject]
@additional_emails = @email[:recipient]
respond_to do |format|
RequestMailer.submit_additional(@request, @message, @additional_emails, @subject).deliver if @additional_emails != ""
RequestMailer.notify_acct(@request, @message, @subject).deliver
@request.update_attributes(params[:request])
format.html { redirect_to home_url, alert: "SIR has been submitted to accounting. Please resubmit if you make any changes." }
format.json { render json: @requests }
end
end
def submit_sales
@request = Request.find(params[:id])
@email = params[:email]
@message = @email[:message]
@request = @request.complete_status(@request)
@subject = @email[:subject]
@additional_emails = @email[:recipient]
respond_to do |format|
RequestMailer.submit_additional(@request, @message, @additional_emails, @subject).deliver if @additional_emails != ""
RequestMailer.notify_sales(@request, @message, @subject).deliver
@request.update_attributes(params[:request])
format.html { redirect_to home_url, alert: "SIR has been submitted to Sales. Please resubmit if you make any changes." }
format.json { render json: @requests }
end
end
def submit_sor
@request = Request.find(params[:id])
@email = params[:email]
@message = @email[:message]
@request = @request.sor_status(@request)
@subject = @email[:subject]
@additional_emails = @email[:recipient]
respond_to do |format|
RequestMailer.submit_additional(@request, @message, @additional_emails, @subject).deliver if @additional_emails != ""
RequestMailer.notify_a9(@request, @message, @subject).deliver if @request.product_line == "A9"
RequestMailer.notify_a7(@request, @message, @subject).deliver if @request.product_line == "A7"
RequestMailer.notify_ag(@request, @message, @subject).deliver if @request.product_line == "AG"
RequestMailer.notify_af(@request, @message, @subject).deliver if @request.product_line == "AF"
RequestMailer.notify_S3(@request, @message, @subject).deliver if @request.product_line == "S3"
RequestMailer.notify_legacy(@request, @message, @subject).deliver if @request.product_line == "Legacy"
RequestMailer.notify_kkpro(@request, @message, @subject).deliver if @request.product_line == "K/Kpro"
RequestMailer.notify_emw(@request, @message, @subject).deliver if @request.product_line == "EMW"
RequestMailer.notify_hd(@request, @message, @subject).deliver if @request.product_line == "HD"
RequestMailer.notify_nm(@request, @message, @subject).deliver if @request.product_line == "Non-Metallic"
RequestMailer.notify_mfg(@request, @message, @subject).deliver
@request.update_attributes(params[:request])
format.html { redirect_to home_url, alert: "SOR has been created. An email has been sent to the appropriate personnel." }
format.json { render json: @requests }
end
end
def close_sir
@request = Request.find(params[:id])
@request = @request.complete_status(@request)
respond_to do |format|
@request.update_attributes(params[:request])
format.html { redirect_to home_url, alert: "SIR has been marked as complete." }
format.json { render json: @requests }
end
end
def download
@request_file = RequestFile.where('id LIKE ?', params[:id])
@path = @request_file.each do |p|
return p.file_url
end
@name = params[:file]
# for windows testing
@file = "c://users/sabrams/engdb/public#{@name}"
# for linux live system
#@file = "/srv/engdb/public#{@name}"
send_file( @file,
:disposition => 'inline',
:x_sendfile => true )
#rescue TypeError
# redirect_to @request, :flash => { :alert => "File not found. Please try again or contact support." }
end
private
def request_params
params.require(:request).permit(:request_number, request_files_attributes: [:id, :request_id, :file])
end
end
我也遇到了同样的问题。在控制器#new方法中，您有.build，但在#edit方法中没有，仅在该条件内。我想这就是为什么它没有出现的原因。