Question

我有两个带有has_many关联的模型，如下所示。我的问题是，我无法得到任何一个保存的ID。我在站点表中有一个model_id，在模型表中有一个site_id来保存id。我错过了这些协会还是做错了什么？

class Site < ActiveRecord::Base
 has_many :models
end

class Model < ActiveRecord::Base
 has_many :sites
end

Answer 1

class Site < ActiveRecord::Base
 has_many :model_sites, inverse_of: :site, dependent: :destroy
 has_many :models, through: :model_sites
end

class ModelSite < ActiveRecord::Base
  belongs_to :model
  belongs_to :site
  validates_presence_of :model, :site
end

class Model < ActiveRecord::Base
  has_many :model_sites, inverse_of: :model, dependent: :destroy
  has_many :sites, through: :model_sites
end

我有两个带有has_many关联的模型

1 个答案: