英文:
Duplicate entity with one to many in rails
问题
这是一个有些新手问题。
我在Rails中有一个一对多的关系，比如项目（Project）与多个任务（Tasks）的关系。
我想要为用户提供重新创建项目和任务的能力，比如在员工入职后再使用相同的任务。所以在每个项目记录上，添加一个“复制”按钮。当点击时，我将创建一个新的项目，其中某些属性已更改，并重新创建该项目的所有任务。
我的问题很一般，我应该在哪里做以及如何做？我知道Rails提供了一个*.dup函数。这应该放在模型（Model）中吗？还是控制器（Controller）中？Rails的处理方法是什么？
谢谢！
英文:
This is a somewhat newbie question.
I have a one to many relationship in rails, think Project with many Tasks.
I want to provide the user with the ability to recreate the Project and Tasks for a new Project (think onboarding an employee and then using the same tasks). So on each project record, add a Duplicate button. When clicked I would create a new project with a few properties changed and recreate all the tasks for that project.
My question is general, what would I do and where? I know rails offers a *.dup function. Would that go in a model? Controller? What is the rails way to approach this.
Thanks!
答案1
得分: 0
关于deep_cloneable是什么？
> deep_clone方法支持通过传递选项哈希指定的一些选项。如果没有选项，行为与ActiveRecord的dup方法相同。
project.deep_clone(include: :tasks)
英文:
What's about deep_cloneable?
> The deep_clone method supports a couple options that can be specified by passing an options hash. Without options, the behaviour is the same as ActiveRecord's dup method.
project.deep_clone(include: :tasks)
答案2
得分: 0
这将是Project类中的一个好方法。
class Project
has_many :tasks
def duplicate
p = Project.create(name: "复制自#{ name }")
tasks.each do |t|
p.tasks.create(name: t.name)
end
p
end
然后，要使用它，
new_project = existing_project.duplicate
英文:
This would be a good method in the Project class.
class Project
has_many :tasks
def duplicate
p = Project.create(name: "Copy of #{ name }")
tasks.each do |t|
p.tasks.create(name: t.name)
end
p
end
Then, to use it,
new_project = existing_project.duplicate
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