ActiveRecord::AssociationTypeMitch Rails CSV导入
我正在使用ActiveRecord::AssociationTypeMitch Rails CSV导入,csv,ruby-on-rails-5,roo,Csv,Ruby On Rails 5,Roo,我正在使用gemroo导入CSV数据。它工作得很顺利,直到有关联为止,我希望roo可以将字符串转换为关联中相应的整数值。在我的例子中,我有一个Staff模型,它属于状态 class State < ApplicationRecord has_many :staffs end 突出显示的来源是: staff.attributes = row.to_hash gemroo是否可以将csv文件中的“Texas”翻译为(比如)id 2,而不是最终用户在上传数据之前进行大量翻译工作 这
gemroo
导入CSV数据。它工作得很顺利,直到有关联为止,我希望roo可以将字符串转换为关联中相应的整数值。在我的例子中,我有一个Staff
模型,它属于状态
class State < ApplicationRecord
has_many :staffs
end
突出显示的来源是:
staff.attributes = row.to_hash
gemroo
是否可以将csv文件中的“Texas”翻译为(比如)id 2,而不是最终用户在上传数据之前进行大量翻译工作
这里是staff\u imports.rb
class StaffsImport
include ActiveModel::Model
require 'roo'
attr_accessor :file
def initialize(attributes={})
attributes.each { |name, value| send("#{name}=", value) }
end
def persisted?
false
end
def open_spreadsheet
case File.extname(file.original_filename)
when ".csv" then Csv.new(file.path, nil, :ignore)
when ".xls" then Roo::Excel.new(file.path, nil, :ignore)
when ".xlsx" then Roo::Excelx.new(file.path)
else raise "Unknown file type: #{file.original_filename}"
end
end
def load_imported_staffs
spreadsheet = open_spreadsheet
header = spreadsheet.row(1)
(2..spreadsheet.last_row).map do |i|
row = Hash[[header, spreadsheet.row(i)].transpose]
staff = Staff.find_by_national_id(row["national_id"]) || Staff.new
staff.attributes = row.to_hash
staff
end
end
def imported_staffs
@imported_staffs ||= load_imported_staffs
end
def save
if imported_staffs.map(&:valid?).all?
imported_staffs.each(&:save!)
true
else
imported_staffs.each_with_index do |staff, index|
staff.errors.full_messages.each do |msg|
errors.add :base, "Row #{index + 6}: #{msg}"
end
end
false
end
end
end
最后,staff\u导入控制器.rb
:
class StaffsImportsController < ApplicationController
def new
@staffs_import = StaffsImport.new
end
def create
@staffs_import = StaffsImport.new(params[:staffs_import])
if @staffs_import.save
flash[:success] = "You have successfully uploaded your staff!"
redirect_to staffs_path
else
render :new
end
end
end
class StaffsImportsController
非常感谢您提供的任何帮助/线索。由于这里提供了非常详细的问题和非常好的答案,我设法找到了解决方案
class StaffsImport
include ActiveModel::Model
require 'roo'
attr_accessor :file
def initialize(attributes={})
attributes.each { |name, value| send("#{name}=", value) }
end
def persisted?
false
end
def open_spreadsheet
case File.extname(file.original_filename)
when ".csv" then Csv.new(file.path, nil, :ignore)
when ".xls" then Roo::Excel.new(file.path, nil, :ignore)
when ".xlsx" then Roo::Excelx.new(file.path)
else raise "Unknown file type: #{file.original_filename}"
end
end
def load_imported_staffs
spreadsheet = open_spreadsheet
header = spreadsheet.row(1)
(2..spreadsheet.last_row).map do |i|
row = Hash[[header, spreadsheet.row(i)].transpose]
staff = Staff.find_by_national_id(row["national_id"]) || Staff.new
staff.attributes = row.to_hash
staff
end
end
def imported_staffs
@imported_staffs ||= load_imported_staffs
end
def save
if imported_staffs.map(&:valid?).all?
imported_staffs.each(&:save!)
true
else
imported_staffs.each_with_index do |staff, index|
staff.errors.full_messages.each do |msg|
errors.add :base, "Row #{index + 6}: #{msg}"
end
end
false
end
end
end
class StaffsImportsController < ApplicationController
def new
@staffs_import = StaffsImport.new
end
def create
@staffs_import = StaffsImport.new(params[:staffs_import])
if @staffs_import.save
flash[:success] = "You have successfully uploaded your staff!"
redirect_to staffs_path
else
render :new
end
end
end