在 Rails 3 生成器中多次调用任务

发布于 2024-10-05 17:25:28 字数 404 浏览 0 评论 0原文

我正在编写一个 Rails 3 生成器来创建两个不同的模型。这是我想要做的一个非常简单的示例:

def my_generator_task
  invoke "model", ["foo"]
  invoke "model", ["bar"]
end

问题是 Thor invoke 方法 仅调用一次任务,因此永远不会发生对“model”任务的第二次调用,并且永远不会创建“bar”模型。有谁知道一种优雅的方法来实现这一点,最好是以一种不会破坏使用生成器运行“rails destroy”的能力的方式?

I'm writing a Rails 3 generator that creates two different models. Here's a very simplified example of what I'm trying to do:

def my_generator_task
  invoke "model", ["foo"]
  invoke "model", ["bar"]
end

The problem is that the Thor invoke method only invokes a task once, so the second call to the "model" task never happens and the "bar" model is never created. Does anyone know an elegant way to accomplish this, preferably in a way that doesn't break the ability to run "rails destroy" with the generator?

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通知家属抬走 2024-10-12 17:25:29

再想一想,这样也可以运行多个模型生成器而无需迁移

Rails::Generators.invoke("active_record:model", ["foo", "--no-migration" ])
Rails::Generators.invoke("active_record:model", ["bar", "--no-migration" ])

One more thought, this way it is also possible to run multiple model generator without migration

Rails::Generators.invoke("active_record:model", ["foo", "--no-migration" ])
Rails::Generators.invoke("active_record:model", ["bar", "--no-migration" ])
梦冥 2024-10-12 17:25:29

使用 Thor,如果你想调用一个没有依赖管理的任务,你只需直接调用它:

model(foo)
model(bar

With Thor, if you want to invoke a task withOUT dependency management, you just call it directly:

model(foo)
model(bar
攒眉千度 2024-10-12 17:25:29

如果您想运行一个从 Thor::Group 子类化的生成器,即不仅仅是单个 Thor 任务,您可以从任何不同的文件调用整个生成器。

Rails::Generators.invoke("my_generator", my_generator_args)

Railties/rails 中的生成器模块generators.rb 似乎创建了一个新实例,因此它认为该任务尚未被调用。这意味着您可以根据需要多次重复上面的行,并且每次都会运行。

In case you want to run a generator that subclasses from Thor::Group, i.e. not just a single Thor task, you can invoke an entire generator from any different file.

Rails::Generators.invoke("my_generator", my_generator_args)

The generators module generators.rb in railties/rails seems to create a new instance, so it doesn't think that the task has already been called. This means you can repeat the above line as many times as you want and it will run each time.

暮色兮凉城 2024-10-12 17:25:29

我不知道有什么优雅的方法可以做到这一点。在本次演讲中,我给出了一个调用controller 生成器两次 - 查看幻灯片 43。

不优雅的方法是进入 Thor 的 @_invocables 数组并删除第一次运行的任务,然后再运行它。

I don't know of an elegant way to do that. In this talk, I gave an example of a custom generator that invokes the controller generator twice - check out slide 43.

The inelegant way is to go into Thor's @_invocations array and delete the first run's tasks before running it again.

万人眼中万个我 2024-10-12 17:25:29

有一个名为“行为”的宏方法可以提供帮助(使用 bonyiii 的示例):

def generate_model
  if behavior == :invoke
    Rails::Generators.invoke("active_record:model", ["foo", "--no-migration"], behavior: behavior)
    Rails::Generators.invoke("active_record:model", ["bar", "--no-migration"], behavior: behavior)
  else # behavior == :revoke
    Rails::Generators.invoke("active_record:model", ["foo", "--no-migration"], behavior: :revoke)
    Rails::Generators.invoke("active_record:model", ["bar", "--no-migration"], behavior: :revoke)
  end
end

或者只是:

def generate_model
  Rails::Generators.invoke("active_record:model", ["foo", "--no-migration"], behavior: behavior)
  Rails::Generators.invoke("active_record:model", ["bar", "--no-migration"], behavior: behavior)
end

there is a macro method called "behavior" can help(using bonyiii's example):

def generate_model
  if behavior == :invoke
    Rails::Generators.invoke("active_record:model", ["foo", "--no-migration"], behavior: behavior)
    Rails::Generators.invoke("active_record:model", ["bar", "--no-migration"], behavior: behavior)
  else # behavior == :revoke
    Rails::Generators.invoke("active_record:model", ["foo", "--no-migration"], behavior: :revoke)
    Rails::Generators.invoke("active_record:model", ["bar", "--no-migration"], behavior: :revoke)
  end
end

or just:

def generate_model
  Rails::Generators.invoke("active_record:model", ["foo", "--no-migration"], behavior: behavior)
  Rails::Generators.invoke("active_record:model", ["bar", "--no-migration"], behavior: behavior)
end
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