[英]active admin gem (name error)
I have this classes. 我有这节课。
user: 用户:
class User < ActiveRecord::Base
attr_accessible :email, :name
has_many :berichten
end
category: 类别:
class Category < ActiveRecord::Base
attr_accessible :name
has_many :berichten
end
Berichten : 丰富:
class Berichten < ActiveRecord::Base
attr_accessible :bericht, :user
belongs_to :user
belongs_to :category
end
I did first : rails generate active_admin:resource users And I see this output : create app/admin/users.rb 我首先做的是:rails generate active_admin:resource users并且我看到此输出:create app / admin / users.rb
Then I did : ails generate active_admin:resource category And I see this output : 然后我做了:ails生成active_admin:resource类别,然后看到以下输出:
home/roelof/tamara/tamara_site/app/admin/users.rb:1:in `<top (required)>': uninitialized constant Users (NameError)
from /home/roelof/.gem/ruby/1.9.1/gems/activeadmin-0.5.0/lib/active_admin/application.rb:182:in `block in load!'
from /home/roelof/.gem/ruby/1.9.1/gems/activeadmin-0.5.0/lib/active_admin/application.rb:182:in `each'
from /home/roelof/.gem/ruby/1.9.1/gems/activeadmin-0.5.0/lib/active_admin/application.rb:182:in `load!'
from /home/roelof/.gem/ruby/1.9.1/gems/activeadmin-0.5.0/lib/active_admin/application.rb:205:in `routes'
from /home/roelof/.gem/ruby/1.9.1/gems/activeadmin-0.5.0/lib/active_admin.rb:79:in `routes'
from /home/roelof/tamara/tamara_site/config/routes.rb:2:in `block in <top (required)>'
from /home/roelof/.gem/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:282:in `instance_exec'
from /home/roelof/.gem/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:282:in `eval_block'
from /home/roelof/.gem/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:260:in `draw'
from /home/roelof/tamara/tamara_site/config/routes.rb:1:in `<top (required)>'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `each'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/application.rb:108:in `reload_routes!'
from /home/roelof/.gem/ruby/1.9.1/gems/activeadmin-0.5.0/lib/active_admin/reloader.rb:34:in `reload!'
from /home/roelof/.gem/ruby/1.9.1/gems/activeadmin-0.5.0/lib/active_admin/reloader.rb:61:in `block in attach!'
from /home/roelof/.gem/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:429:in `_run__3584427286517482665__prepare__2286595675940506716__callbacks'
from /home/roelof/.gem/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `__run_callback'
from /home/roelof/.gem/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:385:in `_run_prepare_callbacks'
from /home/roelof/.gem/ruby/1.9.1/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks'
from /home/roelof/.gem/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_dispatch/middleware/reloader.rb:74:in `prepare!'
from /home/roelof/.gem/ruby/1.9.1/gems/actionpack-3.2.8/lib/action_dispatch/middleware/reloader.rb:48:in `prepare!'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/application/finisher.rb:47:in `block in <module:Finisher>'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/initializable.rb:30:in `instance_exec'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/initializable.rb:30:in `run'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/initializable.rb:55:in `block in run_initializers'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/initializable.rb:54:in `each'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/initializable.rb:54:in `run_initializers'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/application.rb:136:in `initialize!'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/roelof/tamara/tamara_site/config/environment.rb:5:in `<top (required)>'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/application.rb:103:in `require_environment!'
from /home/roelof/.gem/ruby/1.9.1/gems/railties-3.2.8/lib/rails/commands.rb:25:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
How to solve this one? 如何解决这个问题?
Roelof 罗洛夫
You should do rails generate active_admin:resource user
instead of rails generate active_admin:resource users
(user vs. users). 您应该让
rails generate active_admin:resource user
而不是rails generate active_admin:resource users
(用户与用户)。
The way you did it, active_admin searches for a Users
class which of course doesn't exist. 执行此方法的方法是,active_admin搜索一个当然不存在的
Users
类。
So delete app/admin/users.rb
and run the command above. 因此,删除
app/admin/users.rb
并运行上面的命令。
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