我正在尝试通过一个表构建一个模型，其中用户有许多角色，如：技能，服务，项目等。
我一整天都在努力争取技能表工作，并将其建模为：
class User < ApplicationRecord
has_many :roles
has_many :skills, through: :roles
class Skill < ApplicationRecord
has_many :roles
has_many :users, through: :roles
end
class Role < ApplicationRecord
belongs_to :user
belongs_to :skill
end
我能得到的最接近的是这个错误。
skill.users
ActiveRecord::HasManyThroughSourceAssociationNotFoundError: Could not find the source association(s) "user" or :users in model Role. Try 'has_many :users, :through => :roles, :source => <name>'. Is it one of ?
这是架构：
ActiveRecord::Schema.define(version: 20160728053925) do
create_table "relationships", force: :cascade do |t|
t.integer "userSkill"
t.integer "skillUser"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["skillUser", "userSkill"], name: "index_relationships_on_skillUser_and_userSkill", unique: true
t.index ["skillUser"], name: "index_relationships_on_skillUser"
t.index ["userSkill"], name: "index_relationships_on_userSkill"
end
create_table "roles", force: :cascade do |t|
t.integer "user_id"
t.integer "skill_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["skill_id"], name: "index_roles_on_skill_id"
t.index ["user_id"], name: "index_roles_on_user_id"
end
create_table "skills", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "users", force: :cascade do |t|
t.string "firstname"
t.string "lastname"
t.string "zipcode"
t.string "email"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "password_digest"
t.string "remember_digest"
t.boolean "admin", default: false
t.string "activation_digest"
t.boolean "activated", default: false
t.datetime "activated_at"
t.string "reset_digest"
t.datetime "reset_sent_at"
t.index ["email"], name: "index_users_on_email", unique: true
end
end
那个关系表是从被破坏的迁移中叛逆的，并不属于那里，但我可以自己处理如何删除它。
无论如何，我错过了什么？我是否在正确的轨道上，如何通过工作获得我的has_many，这样我就可以为用户分配技能。
最终的想法是，许多用户可以拥有相同的技能..
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT ? [["id", 1], ["LIMIT", 1]]
=> #<User id: 1, firstname: "Jeremy", lastname: "*****", zipcode: nil, email: "*****@gmail.com", created_at: "2016-07-28 05:40:45", updated_at: "2016-07-28 05:40:45", password_digest: "$2a$10$gGkUlUXDVrVtYzHzDdnPQenVrX8sxoXkgdIVeHxIQPr...", remember_digest: nil, admin: true, activation_digest: "$2a$10$6isSjCt3dnVDxEq4HKLBbOTkKFBOEDV8my94rdfZQJL...", activated: true, activated_at: "2016-07-28 05:40:45", reset_digest: nil, reset_sent_at: nil>
irb(main):047:0> skill = Skill.find 1
Skill Load (0.2ms) SELECT "skills".* FROM "skills" WHERE "skills"."id" = ? LIMIT ? [["id", 1], ["LIMIT", 1]]
=> #<Skill id: 1, name: "comedy", created_at: "2016-07-28 05:53:56", updated_at: "2016-07-28 05:53:56">
irb(main):048:0> user.skills
ActiveRecord::HasManyThroughSourceAssociationNotFoundError: Could not find the source association(s) "skill" or :skills in model Role. Try 'has_many :skills, :through => :roles, :source => <name>'. Is it one of ?
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/reflection.rb:914:in `check_validity!'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations/association.rb:25:in `initialize'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations/has_many_through_association.rb:8:in `initialize'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations.rb:235:in `new'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations.rb:235:in `association'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations/builder/association.rb:111:in `skills'
from (irb):48
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands/console.rb:65:in `start'
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands/console_helper.rb:9:in `start'
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:78:in `console'
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands.rb:18:in `<top (required)>'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:293:in `require'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:293:in `block in require'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:259:in `load_dependency'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:293:in `require'
from /home/jeremy/dareal/bin/rails:9:in `<top (required)>'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:287:in `load'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:287:in `block in load'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:259:in `load_dependency'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:287:in `load'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'
irb(main):049:0> skill.users
ActiveRecord::HasManyThroughSourceAssociationNotFoundError: Could not find the source association(s) "user" or :users in model Role. Try 'has_many :users, :through => :roles, :source => <name>'. Is it one of ?
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/reflection.rb:914:in `check_validity!'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations/association.rb:25:in `initialize'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations/has_many_through_association.rb:8:in `initialize'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations.rb:235:in `new'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations.rb:235:in `association'
from /home/jeremy/.gem/ruby/2.3.0/gems/activerecord-5.0.0/lib/active_record/associations/builder/association.rb:111:in `users'
from (irb):49
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands/console.rb:65:in `start'
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands/console_helper.rb:9:in `start'
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:78:in `console'
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /home/jeremy/.gem/ruby/2.3.0/gems/railties-5.0.0/lib/rails/commands.rb:18:in `<top (required)>'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:293:in `require'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:293:in `block in require'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:259:in `load_dependency'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:293:in `require'
from /home/jeremy/dareal/bin/rails:9:in `<top (required)>'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:287:in `load'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:287:in `block in load'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:259:in `load_dependency'
from /home/jeremy/.gem/ruby/2.3.0/gems/activesupport-5.0.0/lib/active_support/dependencies.rb:287:in `load'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'