尝试rake后：db migrate，我在终端
中收到此错误rake aborted!
ArgumentError: Unknown key: :conditions. Valid keys are: :class_name, :class, :foreign_key, :validate, :autosave, :table_name, :before_add, :after_add, :before_remove, :after_remove, :extend, :primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type
/app/models/user.rb:8:in `<class:User>'
/app/models/user.rb:1:in `<top (required)>'
/config/routes.rb:24:in `block in <top (required)>'
/config/routes.rb:1:in `<top (required)>'
/config/environment.rb:5:in `<top (required)>'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)
当我运行rails s时，这是我在终端中遇到的错误
Exiting
/usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/core_ext/hash/keys.rb:75:in `block in assert_valid_keys': Unknown key: :conditions. Valid keys are: :class_name, :class, :foreign_key, :validate, :autosave, :table_name, :before_add, :after_add, :before_remove, :after_remove, :extend, :primary_key, :dependent, :as, :through, :source, :source_type, :inverse_of, :counter_cache, :join_table, :foreign_type (ArgumentError)
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/core_ext/hash/keys.rb:73:in `each_key'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/core_ext/hash/keys.rb:73:in `assert_valid_keys'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/associations/builder/association.rb:82:in `validate_options'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/associations/builder/association.rb:62:in `initialize'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/associations/builder/collection_association.rb:18:in `initialize'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/associations/builder/association.rb:47:in `new'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/associations/builder/association.rb:47:in `create_builder'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/associations/builder/association.rb:35:in `build'
from /usr/local/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/associations.rb:1258:in `has_many'
from /app/models/user.rb:6:in `<class:User>'
from /app/models/user.rb:1:in `<top (required)>'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:457:in `load'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:457:in `block in load_file'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:647:in `new_constants_in'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:456:in `load_file'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:354:in `require_or_load'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:494:in `load_missing_constant'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:184:in `const_missing'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/inflector/methods.rb:261:in `const_get'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/inflector/methods.rb:261:in `block in constantize'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/inflector/methods.rb:259:in `each'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/inflector/methods.rb:259:in `inject'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/inflector/methods.rb:259:in `constantize'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:566:in `get'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:597:in `constantize'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise.rb:302:in `get'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise/mapping.rb:80:in `to'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise/mapping.rb:75:in `modules'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise/mapping.rb:92:in `routes'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise/mapping.rb:159:in `default_used_route'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise/mapping.rb:69:in `initialize'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise.rb:336:in `new'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise.rb:336:in `add_mapping'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise/rails/routes.rb:224:in `block in devise_for'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise/rails/routes.rb:223:in `each'
from /usr/local/lib/ruby/gems/2.2.0/gems/devise-3.4.1/lib/devise/rails/routes.rb:223:in `devise_for'
from /config/routes.rb:24:in `block in <top (required)>'
from /usr/local/lib/ruby/gems/2.2.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:423:in `instance_exec'
from /usr/local/lib/ruby/gems/2.2.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:423:in `eval_block'
from /usr/local/lib/ruby/gems/2.2.0/gems/actionpack-4.2.0/lib/action_dispatch/routing/route_set.rb:401:in `draw'
from /config/routes.rb:1:in `<top (required)>'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `block in load'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/routes_reloader.rb:40:in `each'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/file_update_checker.rb:75:in `call'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/file_update_checker.rb:75:in `execute'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/routes_reloader.rb:27:in `updater'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `instance_exec'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `run'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:55:in `block in run_initializers'
from /usr/local/lib/ruby/2.2.0/tsort.rb:226:in `block in tsort_each'
from /usr/local/lib/ruby/2.2.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
from /usr/local/lib/ruby/2.2.0/tsort.rb:429:in `each_strongly_connected_component_from'
from /usr/local/lib/ruby/2.2.0/tsort.rb:347:in `block in each_strongly_connected_component'
from /usr/local/lib/ruby/2.2.0/tsort.rb:345:in `each'
from /usr/local/lib/ruby/2.2.0/tsort.rb:345:in `call'
from /usr/local/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component'
from /usr/local/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each'
from /usr/local/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:54:in `run_initializers'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application.rb:352:in `initialize!'
from /config/environment.rb:5:in `<top (required)>'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `block in require'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require'
from /config.ru:3:in `block in <main>'
from /usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.1/lib/rack/builder.rb:55:in `instance_eval'
from /usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.1/lib/rack/builder.rb:55:in `initialize'
from /config.ru:in `new'
from /config.ru:in `<main>'
from /usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.1/lib/rack/builder.rb:49:in `eval'
from /usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.1/lib/rack/builder.rb:49:in `new_from_string'
from /usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.1/lib/rack/builder.rb:40:in `parse_file'
from /usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.1/lib/rack/server.rb:299:in `build_app_and_options_from_config'
from /usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.1/lib/rack/server.rb:208:in `app'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/server.rb:61:in `app'
from /usr/local/lib/ruby/gems/2.2.0/gems/rack-1.6.1/lib/rack/server.rb:336:in `wrapped_app'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/server.rb:139:in `log_to_stdout'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/server.rb:78:in `start'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:80:in `block in server'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /usr/local/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
from /bin/rails:8:in `require'
from /bin/rails:8:in `<top (required)>'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/rails.rb:28:in `load'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/rails.rb:28:in `call'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/command.rb:7:in `call'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client.rb:26:in `run'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.3.6/bin/spring:48:in `<top (required)>'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/binstub.rb:11:in `load'
from /usr/local/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/binstub.rb:11:in `<top (required)>'
from /usr/local/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /usr/local/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
我有以下有效记录模型：
class User < ActiveRecord::Base
has_many :user_friendships
has_many :friends, through: :user_friendships,
conditions: { user_friendships: { state: 'accepted' } }
has_many :pending_user_friendships, class_name: 'UserFriendship',
foreign_key: :user_id,
conditions: { state: 'pending' }
has_many :pending_friends, through: :pending_user_friendships, source: :friend
end
UserFriendship模型
class UserFriendship < ActiveRecord::Base
belongs_to :user
belongs_to :friend, class_name: 'User', foreign_key: 'friend_id'
include AASM
aasm column: 'state', initial: :pending, whiny_transitions: true do
state :requested # im not seeing any event which set this state
state :accepted
#if you want an to trigger request event from any state simply add this
event :request, after: Proc.new { send_request_email } do transitions to: :requested end
#if you want to trigger accepted state from any state do this
event :accept, after: Proc.new { send_acceptance_email } do transitions to: :accepted end
#if you want to trigger accepted state from only requeste state
event :accept, after: Proc.new { send_acceptance_email } do transitions from: :requested, to: :accepted end
end
def self.request(user1, user2)
transaction do
friendship1 = create!(user: user1, friend: user2, state: 'pending')
friendship2 = create!(user: user1, friend: user2, state: 'requested')
friendship1.send_request_email
friendship1
end
end
def send_request_email
UserNotifier.friend_requested(id).deliver
end
def send_acceptance_email
UserNotifier.friend_accepted(id).deliver
end
end
AddStateToUserFriendships迁移文件
class AddStateToUserFriendships < ActiveRecord::Migration
def change
add_column :user_friendships, :state, :string, :whiny_transitions => false do
add_index :user_friendships, :state
end
end
CreateUserFriendships迁移文件
class CreateUserFriendships < ActiveRecord::Migration
def change
create_table :user_friendships do |t|
t.integer :user_id
t.integer :friend_id
t.timestamps null: false
end
add_index :user_friendships, [:user_id, :friend_id]
end
end
UserFriendshipsController.rb
class UserFriendshipsController < ApplicationController
before_action :authenticate_user!
def new
if params[:friend_id]
@friend = User.where(name: params[:friend_id]).first
raise ActiveRecord::RecordNotFound if @friend.nil?
@user_friendship = current_user.user_friendships.new(friend: @friend)
else
flash[:error] = "Friend required"
end
rescue ActiveRecord::RecordNotFound
render file: 'public/404', status: :not_found
end
private
def user_friendships_params
params.require(:user_friendships).permit(:user, :friend, :user_id, :friend_id, :state)
end
def create
if params[:user_friendship] && params[:user_friendship].has_key?(:friend_id)
@friend = User.where(name: params[:user_friendship][:friend_id]).first
@user_friendship = current_user.user_friendships.new(friend: @friend)
@user_friendship.save
redirect_to root_path
flash[:notice] = "Friend Added"
else
flash[:error] = "Friend Required"
redirect_to root_path
end
end
end
答案 0 :(得分：10)
您应该将User模型中的代码更改为
class User < ActiveRecord::Base
has_many :user_friendships
has_many :friends, -> { where(user_friendships: { state: "accepted"}) }, through: :user_friendships
has_many :pending_user_friendships, -> { where(state: "pending") }, class_name: 'UserFriendship', foreign_key: :user_id
has_many :pending_friends, through: :pending_user_friendships, source: :friend
end