我在Heroku上只看到了祖先的一个问题(无法在本地重现): https://github.com/stefankroes/ancestry
home#upload发生NoMethodError: 未定义的方法`祖先'对于#
方法如下:
def anthem_upload
user = User.find_by(id: params[:user_id])
anthem = Anthem.create!(user_id: user.id, body:params[:post]) <-- HAPPENS HERE
...
ene
这种方法甚至不会调用.ancestry方法 - 但是一旦创建模型就会发生异常。
模型看起来像这样:
class Anthem < ActiveRecord::Base
has_ancestry
...
end
这是日志:
A NoMethodError occurred in home#anthem_upload: undefined method `ancestry' for #<Anthem:0x007f1684d58b98> app/controllers/home_controller.rb:335:in `anthem_upload'
答案 0 :(得分:2)
您必须运行迁移才能将方法ancestry
添加到模型中:
heroku run rake db:migrate
当然假设您的应用在开发中工作。如果没有,您可以使用
生成迁移rails g migration add_ancestry_to_[table] ancestry:string
取自ancestry
<强>被修改强>
读完你的评论后,我确实尝试了我的假设。将ancestry
gem添加到不需要的项目中,并在我没有迁移的情况下将has_ancestry
添加到模型Task
,我得到了控制台:
Loading development environment (Rails 4.2.2)
~/ (development) > Task.new
=> #<Task:0x00000008a3d088> {
:id => nil,
:project_id => nil,
:name => nil,
:description => nil,
:points_budget => nil,
:created_at => nil,
:updated_at => nil
}
~/ (development) > Task.new.save
(0.2ms) BEGIN
(0.2ms) ROLLBACK
NoMethodError: undefined method `ancestry' for #<Task:0x00000008a9c998>
from /home/alejandro/.rvm/gems/ruby-2.2.2@rails4/gems/activemodel-4.2.2/lib/active_model/attribute_methods.rb:433:in `method_missing'
~/ (development) > Task.new.validate
NoMethodError: undefined method `ancestry' for #<Task:0x00000008ad1210>
from /home/alejandro/.rvm/gems/ruby-2.2.2@rails4/gems/activemodel-4.2.2/lib/active_model/attribute_methods.rb:433:in `method_missing'
你得到同样的错误。当然,我正处于发展阶段。你必须在heroku上尝试这样的事情:heroku run rails console