：inverse_of不通过accepts_nested_attributes_for关系工作

Question

我有类似的东西：

class Project < ActiveRecord::Base
  has_many :foos, inverse_of: :project
  has_many :bars, inverse_of: :project
end

class Foo < ActiveRecord::Base
  belongs_to :project, inverse_of: :foos
  has_and_belongs_to_many :bars

  accepts_nested_attributes_for :bars
end

class Bar < ActiveRecord::Base
  belongs_to :project, inverse_of: :bars
  has_and_belongs_to_many :foos

  validates_presence_of :project
end

proj = Project.create
foo  = Foo.new(project: project, bars_attributes: {0 => [name: "first bar"]})
foo.save! #-> Bar is invalid

Foos和Bars都属于一个项目，并且habtm关系加入了它们......

我希望能够为Bar创建新的Foos，让它们属于Bar的项目......但是项目验证失败了。

我是通过ActiveAdmin进行此操作，但是我正试图在模型/关系级别解决它，然后再使用InheritedResources覆盖进行hacky ...