我刚刚意识到，当我使用 after_commit 过滤器时，它似乎执行了两次函数（我不知道的原因）
控制器：
def new
@upload_files = UploadFiles.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: @upload_files }
end
end
# GET /uploads/1/edit
def edit
@uploadFiles = Upload.find(params[:id])
end
# POST /uploads
# POST /uploads.json
def create
@upload_files = UploadFiles.create(params[:upload_files])
respond_to do |format|
if @upload_files.save
redirect_to @upload_files
else
format.html { render action: "new" }
format.json { render json: @upload_files.errors, status: :unprocessable_entity }
end
end
end
模板：
<%= csrf_meta_tags %>
<%= form_for :upload_files, :url => upload_files_path, :html => { :multipart => true } do |f| %>
<h4>Upload Inventory</h4>
<div><%= f.file_field :inventory %></div>
<h4>Upload Material List</h4>
<div><%= f.file_field :material_list %></div>
<div align="center">
<%= f.submit "Upload" %>
</div>
<% end %>
class UploadFiles < ActiveRecord::Base
after_save :process_files
def process_files
@init_process=Time.now
out_file = File.new("times.txt", "w")
out_file.puts("Init Time")
out_file.puts(Time.now)
logger.info "Processing the request..."
logger.info Time.now
logger.info "Processing Files..."
logger.info Time.now
.
.
.
end
end
日志：
Started POST "/upload_files" for 127.0.0.1 at 2013-10-17 10:20:06 -0430
Processing by UploadFilesController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"NpCyDUNq8uPwJMj2DofP4rHEZWYkfsIu68Wg+XqebNk=", "upload_files"=>{"inventory"=>#<ActionDispatch::Http::UploadedFile:0x4df7648 @original_filename="INV Onhand -753233-2013090621595800.xlsx", @content_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", @headers="Content-Disposition: form-data; name=\"upload_files[inventory]\"; filename=\"INV Onhand -753233-2013090621595800.xlsx\"\r\nContent-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet\r\n", @tempfile=#<File:C:/Users/V80042~1/AppData/Local/Temp/RackMultipart20131017-7356-1i1m655>>, "material_list"=>#<ActionDispatch::Http::UploadedFile:0x4df7408 @original_filename="Formato SCL Movistar1.xlsx", @content_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", @headers="Content-Disposition: form-data; name=\"upload_files[material_list]\"; filename=\"Formato SCL Movistar1.xlsx\"\r\nContent-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet\r\n", @tempfile=#<File:C:/Users/V80042~1/AppData/Local/Temp/RackMultipart20131017-7356-fqdioq>>}, "commit"=>"Upload"}
[1m[35mUser Load (0.0ms)[0m SELECT "users".* FROM "users" WHERE "users"."id" = 5 LIMIT 1
[1m[36m (0.0ms)[0m [1mbegin transaction[0m
Binary data inserted for `string` type on column `inventory_content_type`
Binary data inserted for `string` type on column `material_list_content_type`
[1m[35mSQL (2.0ms)[0m INSERT INTO "upload_files" ("created_at", "inventory_content_type", "inventory_file_name", "inventory_file_size", "inventory_updated_at", "material_list_content_type", "material_list_file_name", "material_list_file_size", "material_list_updated_at", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?) [["created_at", Thu, 17 Oct 2013 14:50:06 UTC +00:00], ["inventory_content_type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"], ["inventory_file_name", "INV_Onhand_-753233-2013090621595800.xlsx"], ["inventory_file_size", 6776337], ["inventory_updated_at", Thu, 17 Oct 2013 14:50:06 UTC +00:00], ["material_list_content_type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"], ["material_list_file_name", "Formato_SCL_Movistar1.xlsx"], ["material_list_file_size", 42608], ["material_list_updated_at", Thu, 17 Oct 2013 14:50:06 UTC +00:00], ["updated_at", Thu, 17 Oct 2013 14:50:06 UTC +00:00]]
[1m[36m (4.0ms)[0m [1mcommit transaction[0m
Processing the request...
2013-10-17 10:20:07 -0430
Processing Files...
2013-10-17 10:20:07 -0430
Inventory Opened...
2013-10-17 10:21:47 -0430
Material List Opened...
2013-10-17 10:21:48 -0430
Default Sheets were set...
Output file created...
2013-10-17 10:21:48 -0430
Code and Name read...
2013-10-17 10:21:48 -0430
Beginning Inventory reading...
2013-10-17 10:21:48 -0430
Inventory completely read...
2013-10-17 10:57:54 -0430
Total Time reading and Parsing Inventory...
2013-10-17 10:57:54 -0430
Output file created...
2013-10-17 10:58:00 -0430
Process Finished...
2013-10-17 10:58:00 -0430
[1m[35m (1095.0ms)[0m begin transaction
[1m[36m (19.0ms)[0m [1mcommit transaction[0m
Processing the request...
2013-10-17 10:58:03 -0430
Processing Files...
2013-10-17 10:58:03 -0430
failed to allocate memory
Redirected to http://localhost:3000/upload_files/157
Completed 406 Not Acceptable in 2293951ms (ActiveRecord: 1124.0ms)
该文件显然太大了，它会抛出无法分配内存，但如果不是，我很确定它会再次执行它......
为什么它再次执行它？
我尝试使用 after_create 和 after_save 但它抛出一个异常，说 .xlsx 文件不存在。