我想通过 activeadmin 面板上传 CSV 文件。
在资源“产品”的索引页面上，我想要一个带有“导入 csv 文件”的“新产品”按钮旁边的按钮。
我不知道从哪里开始。在文档中是关于collection_action的东西，但是下面的代码我在顶部没有链接。
ActiveAdmin.register Post do
collection_action :import_csv, :method => :post do
# Do some CSV importing work here...
redirect_to :action => :index, :notice => "CSV imported successfully!"
end
end
这里有人使用activeadmin并且可以导入csv数据吗？
继续从Thomas Watsons的良好开端到答案，它帮助我在弄清楚其余部分之前了解我的方位。
代码攻击不仅允许示例 Posts 模型的 CSV 上传，还允许其后的任何后续模型。您需要做的就是将示例中的 action_item 和 collection_actions 复制到任何其他 ActiveAdmin.register 块中，功能将是相同的。希望这可以帮助。
应用程序/管理员/posts.rb
ActiveAdmin.register Post do
action_item :only => :index do
link_to 'Upload CSV', :action => 'upload_csv'
end
collection_action :upload_csv do
render "admin/csv/upload_csv"
end
collection_action :import_csv, :method => :post do
CsvDb.convert_save("post", params[:dump][:file])
redirect_to :action => :index, :notice => "CSV imported successfully!"
end
end
应用程序/模型/csv_db.rb
require 'csv'
class CsvDb
class << self
def convert_save(model_name, csv_data)
csv_file = csv_data.read
CSV.parse(csv_file) do |row|
target_model = model_name.classify.constantize
new_object = target_model.new
column_iterator = -1
target_model.column_names.each do |key|
column_iterator += 1
unless key == "ID"
value = row[column_iterator]
new_object.send "#{key}=", value
end
end
new_object.save
end
end
end
end
注意：此示例检查第一列是否为 ID 列，然后跳过该列，因为 rails 将为新对象分配 ID（请参阅下面的示例 CSV 以供参考）
app/views/admin/csv/upload_csv.html.haml
= form_for :dump, :url=>{:action=>"import_csv"}, :html => { :multipart => true } do |f|
%table
%tr
%td
%label{:for => "dump_file"}
Select a CSV File :
%td
= f.file_field :file
%tr
%td
= submit_tag 'Submit'
应用程序/公共/example.csv
"1","TITLE EXAMPLE","MESSAGE EXAMPLE","POSTED AT DATETIME"
"2","TITLE EXAMPLE","MESSAGE EXAMPLE","POSTED AT DATETIME"
"3","TITLE EXAMPLE","MESSAGE EXAMPLE","POSTED AT DATETIME"
"4","TITLE EXAMPLE","MESSAGE EXAMPLE","POSTED AT DATETIME"
"5","TITLE EXAMPLE","MESSAGE EXAMPLE","POSTED AT DATETIME"
注意：并不总是需要报价
Adding a collection_action does not automatically add a button linking to that action. To add a button at the top of the index screen you need to add the following code to your ActiveAdmin.register block:
action_item :only => :index do
link_to 'Upload CSV', :action => 'upload_csv'
end
But before calling the collection action you posted in your question, you first need the user to specify which file to upload. I would personally do this on another screen (i.e. creating two collection actions - one being a :get action, the other being your :post action). So the complete AA controller would look something like this:
ActiveAdmin.register Post do
action_item :only => :index do
link_to 'Upload posts', :action => 'upload_csv'
end
collection_action :upload_csv do
# The method defaults to :get
# By default Active Admin will look for a view file with the same
# name as the action, so you need to create your view at
# app/views/admin/posts/upload_csv.html.haml (or .erb if that's your weapon)
end
collection_action :import_csv, :method => :post do
# Do some CSV importing work here...
redirect_to :action => :index, :notice => "CSV imported successfully!"
end
end
@krhorst，我试图使用你的代码，但不幸的是它很糟糕。它吃了这么多内存=（所以我决定使用自己的基于 activerecord-import gem 的解决方案
这是https://github.com/Fivell/active_admin_import
特征
根据上面 ben.m 的出色回答，我将csv_db.rb建议的部分替换为：
require 'csv'
class CsvDb
class << self
def convert_save(model_name, csv_data)
begin
target_model = model_name.classify.constantize
CSV.foreach(csv_data.path, :headers => true) do |row|
target_model.create(row.to_hash)
end
rescue Exception => e
Rails.logger.error e.message
Rails.logger.error e.backtrace.join("\n")
end
end
end
end
虽然不是一个完整的答案，但我不希望我的更改污染 ben.m 的答案，以防我做错了什么。
扩展 ben.m 的回复，我发现这非常有用。
我遇到了 CSV 导入逻辑的问题（属性未对齐且列迭代器未按要求运行）并实施了一项更改，该更改使用了每行循环和 model.create 方法。这允许您导入带有与属性匹配的标题行的 .csv。
应用程序/模型/csv_db.rb
require 'csv'
class CsvDb
class << self
def convert_save(model_name, csv_data)
csv_file = csv_data.read
lines = CSV.parse(csv_file)
header = lines.shift
lines.each do |line|
attributes = Hash[header.zip line]
target_model = model_name.classify.constantize
target_model.create(attributes)
end
end
end
end
因此，您导入的 CSV 文件可能如下所示（用于匹配模型属性）：
导入示例.csv
first_name,last_name,attribute1,attribute2
john,citizen,value1,value2
上面的一些解决方案效果很好。我在实践中遇到了我在下面解决的挑战。解决的问题是：
注意：我取出了 ID 过滤器，因此我可以更改我正在处理的 ID，但大多数用例可能希望保留它。
require 'csv'
class CsvDb
class << self
def convert_save(model_name, csv_data)
csv_file = csv_data.read
csv_file.to_s.force_encoding("UTF-8")
csv_file.sub!("\xEF\xBB\xBF", '')
target_model = model_name.classify.constantize
headers = csv_file.split("\n")[0].split(",")
CSV.parse(csv_file, headers: true) do |row|
new_object = target_model.new
column_iterator = -1
headers.each do |key|
column_iterator += 1
value = row[column_iterator]
new_object.send "#{key.chomp}=", value
end
new_object.save
end
ActiveRecord::Base.connection.reset_pk_sequence!(model_name.pluralize)
end
end
end
对于在正常过程中需要时间的大型 excel，我创建了一个 gem，它使用活动作业处理Excel 工作表并使用操作电缆（websockets）显示结果