我试图一次保存两个模型(一对多)。我的代码如下所示:
@submission = Submission.new(submission_params)
@submission_asset = @submission.attachments.new(submission_asset_params)
@submission_asset.attachment_type = 'submission_asset'
if @submission.save
# render or redirect here
else
@submission.errors
end
但是当我运行它时,我得到了这个错误@messages={:attachments=>["is invalid"]}
。我认为这是因为我的附件模型具有以下特征:
# Attachment model snippet
validates :attachable_id, :attachable_type, presence: true
但这是确保将它附加到Submission
。但是,当我删除或注释掉验证时,它将起作用并保存两个模型和关联。
我该如何保存?
编辑
class Submission < ActiveRecord::Base
has_many :attachments, as: :attachable, dependent: :destroy
end
class Attachment < ActiveRecord::Base
belongs_to :attachable, polymorphic: true
validates :attachable_id, :attachable_type, presence: true
end
@submission_asset = @submission.attachments.build(submission_asset_params)
更新:
class Submission < ActiveRecord::Base
has_many :attachments, as: :attachable, inverse_of: :attachable, dependent: :destroy
end
class Attachment < ActiveRecord::Base
belongs_to :attachable, polymorphic: true
validates :attachable, presence: true
end
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我来说两句