FIXED BY:修改模型名称以匹配rails命名约定
当我尝试将技能加入用户时,我得到以下错误:
irb(main):006:0> user.skills << skill
NameError: uninitialized constant Users::Skill
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.1.3/lib/active_r
ecord/base.rb:1341:in `compute_type'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.1.3/lib/active_r
ecord/reflection.rb:173:in `klass'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.1.3/lib/active_r
ecord/associations/collection_association.rb:146:in `transaction'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.1.3/lib/active_r
ecord/associations/collection_association.rb:124:in `concat'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-3.1.3/lib/active_r
ecord/associations/collection_proxy.rb:118:in `<<'
from (irb):6
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/comman
ds/console.rb:45:in `start'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/comman
ds/console.rb:8:in `start'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/comman
ds.rb:40:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
irb(main):007:0>
这是我的用户。rb文件:
class Users < ActiveRecord::Base
has_and_belongs_to_many :skills
end
这是我的技能。Rb文件:
class Skills < ActiveRecord::Base
has_and_belongs_to_many :users
end
这是我的schema。rb文件:
ActiveRecord::Schema.define(:version => 20111214152402) do
create_table "skills", :force => true do |t|
t.integer "user_id"
t.string "description", :null => false
t.string "skill_name", :null => false
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "skills", ["user_id"], :name => "index_skills_on_user_id"
create_table "users", :force => true do |t|
t.integer "skill_id"
t.string "first_name", :limit => 25
t.string "last_name", :limit => 50
t.string "email", :default => ""
t.string "password", :limit => 40
t.string "location", :limit => 100
t.string "status"
t.text "bio"
t.string "question1"
t.string "question2"
t.string "availability"
t.string "image"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "users", ["skill_id"], :name => "index_users_on_skill_id"
create_table "users_skills", :id => false, :force => true do |t|
t.integer "user_id"
t.integer "page_id"
end
add_index "users_skills", ["user_id", "page_id"], :name => "index_users_skills_on_user_id_and_page_id"
end
如果你能帮忙,那就太棒了!如果你需要看其他文件请告诉我
user.skills
是一个数组,所以为了添加技能,你需要执行
user.skills << skill
另外,在您的模式上,我注意到您的user_skils
表包含错误的外键id。我认为应该是user_id
和skill_id
。
你的users
表看起来也不对。在用户表中不需要skill_id。同样,您不需要在技能表中添加user_id。
这是一个关于表和属性应该是什么样子的小图表
users skills_users skills
id ----> user_id
skill_id ---> id
更新2
你的型号名称看起来不对。使用单一模型名是RoR中的惯例。Users
应该是User
。同样,对于技能也是如此。
我认为,问题是skill
是技能的一个实例,而user.skills
期望一个集合。
users.skills = [skill]
应该可以工作,但是有不同的方法创建关联。
乌利希期刊指南。戴夫·牛顿是对的。要向关联中添加记录,您应该使用<<