添加自定义种子文件 [英] Adding a custom seed file

问题描述

我想用虚拟数据填充新功能，但不想使用 db/seeds.rb 文件，因为它已经包含与此功能无关的其他数据的种子.

I want to populate a new feature with dummy data, but don't want to use the db/seeds.rb file as it already has seeds other data irrelevant for this feature.

要运行默认的 seeds.rb 文件，请运行命令 rake db:seed.

To run the default seeds.rb file, you run the command rake db:seed.

如果我在 db 目录中创建一个名为 seeds_feature_x.rb 的文件，那么 rake 命令会如何(仅)运行该文件?

If I create a file in the db directory called seeds_feature_x.rb, what would the rake command look like to run (only) that file?

推荐答案

首先创建一个单独的目录来保存您的自定义种子 - 此示例使用 db/seeds.然后，通过将 rakefile 添加到您的 lib/tasks 目录来创建自定义任务:

Start by creating a separate directory to hold your custom seeds – this example uses db/seeds. Then, create a custom task by adding a rakefile to your lib/tasks directory:

# lib/tasks/custom_seed.rake
namespace :db do
  namespace :seed do
    Dir[Rails.root.join('db', 'seeds', '*.rb')].each do |filename|
      task_name = File.basename(filename, '.rb')
      desc "Seed " + task_name + ", based on the file with the same name in `db/seeds/*.rb`"
      task task_name.to_sym => :environment do
        load(filename) if File.exist?(filename)
      end
    end
  end
end

此 rakefile 接受 db/seeds 目录中的种子文件的名称(不包括 .rb 扩展名)，然后像运行 一样运行它种子.rb.您可以通过从命令行发出以下命令来执行 rake 任务:

This rakefile accepts the name of a seed file in the db/seeds directory (excluding the .rb extension), then runs it as it would run seeds.rb. You can execute the rake task by issuing the following from the command line:

rake db:seed:file_name # Name of the file EXCLUDING the .rb extension 

更新:现在它也应该在运行 rake --tasks 或 rake -T 时列出种子任务.

Update: Now it should also list the seed tasks when running rake --tasks or rake -T.

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