如何覆盖 Rails 的默认迁移生成器模板答案

【问题标题】：How to override Rails' default migration generator template如何覆盖 Rails 的默认迁移生成器模板
【发布时间】：2014-08-07 15:34:36
【问题描述】：

我需要覆盖这些迁移模板：

https://github.com/rails/rails/blob/e20dd73df42d63b206d221e2258cc6dc7b1e6068/activerecord/lib/rails/generators/active_record/migration/templates/migration.rb 和https://github.com/rails/rails/blob/e20dd73df42d63b206d221e2258cc6dc7b1e6068/activerecord/lib/rails/generators/active_record/migration/templates/create_table_migration.rb

在我的 rails 应用程序中，以便他们从 rails 应用程序而不是 gem 本身获取模板。到目前为止，我已经尝试了所有可能的组合，但没有运气。

我尝试过的：

- Rails.root/lib/templates/rails/migration/migration.rb
- Rails.root/lib/templates/rails/migration_generator/migration.rb
- Rails.root/lib/rails/templates/rails/migration/migration.rb
- Rails.root/lib/rails/templates/rails/migration_generator/migration.rb
- Rails.root/lib/rails/generators/templates/rails/migration/migration.rb
- Rails.root/lib/rails/generators/templates/rails/migration_generator/migration.rb
- Rails.root/lib/rails/templates/generators/rails/migration/migration.rb
- Rails.root/lib/rails/templates/generators/rails/migration_generator/migration.rb
- Rails.root/lib/rails/generators/active_record/migration/templates/migration.rb
- Rails.root/lib/rails/generators/active_record/migration_generator/templates/migration.rb
- Rails.root/lib/rails/generators/active_record/templates/migration.rb
- Rails.root/lib/rails/generators/active_record/templates/migration.rb

谁能指出我正确的方向？

【问题讨论】：

标签： ruby-on-rails ruby-on-rails-3 activerecord rails-generators

【解决方案1】：

我想出了一个解决方法：

我用这个命令创建了一个 Rails 生成器（在我的 Rails 应用程序目录中）-

rails g generator my_migrator

它创建：

lib/generators/my_migrator/my_migrator.rb
lib/generators/my_migrator/templates
lib/generators/my_migrator/USAGE

然后我添加了这段代码，通过将这段代码添加到 my_generator.rb 中来扩展我的生成器中的 rails 迁移生成器：

require 'rails/generators'
require 'rails/generators/active_record'
require 'rails/generators/actions/create_migration'

class MyGenerator < ActiveRecord::Generators::Base
  source_root File.expand_path('../templates', __FILE__)
  argument :attributes, :type => :array, :default => [], :banner => "field[:type][:index] field[:type][:index]"

  def create_migration_file
    set_local_assigns!
    validate_file_name!
    migration_template @migration_template, "db/migrate/#{file_name}.rb"
    # more code here as per requirement.
  end

  # more code below as per requirement..
end

在此处发布此内容，希望将来有一天能对某人有所帮助。

【讨论】：