将数据导入 Rails 时遇到问题，奇怪的循环

发布于 2024-12-29 01:00:02 字数 451 浏览 0 评论 0原文

我正在尝试将数据导入到 Rails (3.1) 中，并且创建了此 rake 任务来解析 CSV 文件（由 Mac 上的 Excel 生成），

 desc "Import users." 
  task :import_users => :environment do
    File.open("users.csv", "r").each do |line|
      id, name, age, email = line.strip.split(',')
      u = User.new(:id => id, :name => name, :age => age, :email => email)
      u.save
    end
  end

但是当我运行 rake 任务时，仅导入 CSV 文件的第一行。除了第一行之外，它不会迭代文件中的每一行。谁能告诉我为什么？

原文

I am trying to import data into rails (3.1) and I have created this rake task to parse a CSV file (generated by Excel on Mac)

 desc "Import users." 
  task :import_users => :environment do
    File.open("users.csv", "r").each do |line|
      id, name, age, email = line.strip.split(',')
      u = User.new(:id => id, :name => name, :age => age, :email => email)
      u.save
    end
  end

However when I run the rake task, only the first line of the CSV file gets imported. It does not iterate over every line in the file besides the first one. Can anyone tell me why?

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梦年海沫深 2025-01-05 01:00:02

不确定，但我认为这里发生的是每个代表每个文件而不是每一行。由于只有一个文件，这可能无法按预期工作。我会尝试使用 CSV 解析器：

CSV.foreach("users.csv") do |line|
      id, name, age, email = line
      u = User.new(:id => id, :name => name, :age => age, :email => email)
      u.save
end

Not sure, but I think what is happening here is the each is representing each file rather than each line. And as there's only one file, this may not work as expected. I'd try a CSV parser instead:

CSV.foreach("users.csv") do |line|
      id, name, age, email = line
      u = User.new(:id => id, :name => name, :age => age, :email => email)
      u.save
end

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