我在Ruby 1.9.2上运行Rails 3.0.1。以下是相关的模型，控制器和视图。
user.rb：
class User < ActiveRecord::Base
belongs_to :directory
attr_accessor :new_password, :new_password_confirmation
validates_confirmation_of :new_password, :if => :password_changed?
before_save :hash_password, :if => :password_changed?
def self.authenticate(login, password)
# Check to see if the user exists
if user = find_by_login(login)
# If this is an directory user, authenticate them against their directory
if user.directory
return directory_auth user, password
# Otherwise, authenticate them against the local database
elsif user.hash == Digest::SHA2.hexdigest(user.salt + password)
return user
end
end
return nil
end
def password_changed?
!@new_password.blank?
end
private
def hash_password
self.salt = ActiveSupport::SecureRandom.base64 8
self.hash = Digest::SHA2.hexdigest(self.salt + @new_password)
end
def self.directory_auth(user, password)
directory = user.directory
directory.bind['%s'] = user.login
ldap = Net::LDAP.new
if directory.use_simple_tls?
ldap.encryption :simple_tls
end
ldap.host = directory.host
ldap.port = directory.port
ldap.auth directory.bind, password
return user if ldap.bind
return nil
end
end
users_controller.rb：
class UsersController < ApplicationController
def index
@users = User.all
end
def show
@user = User.find params[:id]
end
def new
@user = User.new
end
def create
@user = User.new params[:user]
if @user.save
flash[:notice] = "#{@user.login} was created"
redirect_to @user
else
flash[:notice] = 'The user could not be created'
render :action => 'new'
end
end
def edit
@user = User.find params[:id]
end
def update
@user = User.find params[:id]
@user.attributes = params[:user] # this works
# @user.update_attributes params[:user] # this does NOT work
if @user.save # I realize this is redundant if update_attributes is working
flash[:notice] = "#{@user.login} was updated"
redirect_to @user
else
flash[:notice] = 'The user could not be updated'
render :action => 'edit'
end
end
def destroy
@user = User.find params[:id]
@user.destroy
flash[:notice] = "#{@user.login} was deleted"
redirect_to users_url
end
end
users.html.erb：
<%= form_for @user do |f| %>
<%= f.label :login %>:
<%= f.text_field :login %>
<br>
<%= f.label :new_password %>:
<%= f.password_field :new_password %>
<br>
<%= f.label :new_password_confirmation %>:
<%= f.password_field :new_password_confirmation %>
<br>
<% if directories = Directory.all.empty? %>
No directories defined. You can <%= link_to 'add a directory', new_directory_path %>.
<% else %>
<%= f.label :directory_id %>:
<%= f.collection_select :directory_id, Directory.all, :id, :name, { :include_blank => 'None' } %>
<% end %>
<br>
<%= f.label :admin, 'Administrator?' %>:
<%= f.check_box :admin %>
<br>
<%= f.submit %>
<% end %>
schema.rb：
ActiveRecord::Schema.define(:version => 20101107005603) do
create_table "directories", :force => true do |t|
t.string "host"
t.string "bind"
t.boolean "use_simple_tls"
t.integer "port"
t.string "name"
t.datetime "created_at"
t.datetime "updated_at"
end
create_table "users", :force => true do |t|
t.string "login"
t.string "hash"
t.string "salt"
t.boolean "admin"
t.integer "directory_id"
t.datetime "created_at"
t.datetime "updated_at"
end
end
我有另一个模型/控制器/视图用于非常相似的目录，但没有虚拟访问器或其他模型ID，update_attributes可以正常工作。我用rails g scaffold users name:string password:string做了一个快速测试应用程序，所有CRUD操作都运行正常。
这让我疯了！我找到了一个解决方法，但我真的想了解为什么update_attributes在这里不起作用。当我运行更新操作时，我得到了这个：
无法将nil转换为Integer
Rails.root：/ home / force / proj
app / controllers / users_controller.rb：34：在`update'
activerecord (3.0.1) lib/active_record/connection_adapters/abstract/database_statements.rb:318:in `uniq' activerecord (3.0.1) lib/active_record/connection_adapters/abstract/database_statements.rb:318:in `commit_transaction_records' activerecord (3.0.1) lib/active_record/connection_adapters/abstract/database_statements.rb:165:in `transaction' activerecord (3.0.1) lib/active_record/transactions.rb:204:in `transaction' activerecord (3.0.1) lib/active_record/transactions.rb:287:in `with_transaction_returning_status' activerecord (3.0.1) lib/active_record/persistence.rb:126:in `update_attributes' app/controllers/users_controller.rb:34:in `update' actionpack (3.0.1) lib/action_controller/metal/implicit_render.rb:4:in `send_action' actionpack (3.0.1) lib/abstract_controller/base.rb:150:in `process_action' actionpack (3.0.1) lib/action_controller/metal/rendering.rb:11:in `process_action' actionpack (3.0.1) lib/abstract_controller/callbacks.rb:18:in `block in process_action' activesupport (3.0.1) lib/active_support/callbacks.rb:435:in `_run__805567340__process_action__482539529__callbacks' activesupport (3.0.1) lib/active_support/callbacks.rb:409:in `_run_process_action_callbacks' activesupport (3.0.1) lib/active_support/callbacks.rb:93:in `run_callbacks' actionpack (3.0.1) lib/abstract_controller/callbacks.rb:17:in `process_action' actionpack (3.0.1) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' activesupport (3.0.1) lib/active_support/notifications.rb:52:in `block in instrument' activesupport (3.0.1) lib/active_support/notifications/instrumenter.rb:21:in `instrument' activesupport (3.0.1) lib/active_support/notifications.rb:52:in `instrument' actionpack (3.0.1) lib/action_controller/metal/instrumentation.rb:29:in `process_action' actionpack (3.0.1) lib/action_controller/metal/rescue.rb:17:in `process_action' actionpack (3.0.1) lib/abstract_controller/base.rb:119:in `process' actionpack (3.0.1) lib/abstract_controller/rendering.rb:40:in `process' actionpack (3.0.1) lib/action_controller/metal.rb:133:in `dispatch' actionpack (3.0.1) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' actionpack (3.0.1) lib/action_controller/metal.rb:173:in `block in action' actionpack (3.0.1) lib/action_dispatch/routing/route_set.rb:62:in `call' actionpack (3.0.1) lib/action_dispatch/routing/route_set.rb:62:in `dispatch' actionpack (3.0.1) lib/action_dispatch/routing/route_set.rb:27:in `call' rack-mount (0.6.13) lib/rack/mount/route_set.rb:148:in `block in call' rack-mount (0.6.13) lib/rack/mount/code_generation.rb:93:in `block in recognize' rack-mount (0.6.13) lib/rack/mount/code_generation.rb:103:in `optimized_each' rack-mount (0.6.13) lib/rack/mount/code_generation.rb:92:in `recognize' rack-mount (0.6.13) lib/rack/mount/route_set.rb:139:in `call' actionpack (3.0.1) lib/action_dispatch/routing/route_set.rb:492:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/head.rb:14:in `call' rack (1.2.1) lib/rack/methodoverride.rb:24:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/params_parser.rb:21:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/flash.rb:182:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/session/abstract_store.rb:149:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/cookies.rb:287:in `call' activerecord (3.0.1) lib/active_record/query_cache.rb:32:in `block in call' activerecord (3.0.1) lib/active_record/connection_adapters/abstract/query_cache.rb:28:in `cache' activerecord (3.0.1) lib/active_record/query_cache.rb:12:in `cache' activerecord (3.0.1) lib/active_record/query_cache.rb:31:in `call' activerecord (3.0.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:355:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/callbacks.rb:46:in `block in call' activesupport (3.0.1) lib/active_support/callbacks.rb:415:in `_run_call_callbacks' actionpack (3.0.1) lib/action_dispatch/middleware/callbacks.rb:44:in `call' rack (1.2.1) lib/rack/sendfile.rb:107:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/remote_ip.rb:48:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/show_exceptions.rb:46:in `call' railties (3.0.1) lib/rails/rack/logger.rb:13:in `call' rack (1.2.1) lib/rack/runtime.rb:17:in `call' activesupport (3.0.1) lib/active_support/cache/strategy/local_cache.rb:72:in `call' rack (1.2.1) lib/rack/lock.rb:11:in `block in call' :10:in `synchronize' rack (1.2.1) lib/rack/lock.rb:11:in `call' actionpack (3.0.1) lib/action_dispatch/middleware/static.rb:30:in `call' railties (3.0.1) lib/rails/application.rb:168:in `call' railties (3.0.1) lib/rails/application.rb:77:in `method_missing' railties (3.0.1) lib/rails/rack/log_tailer.rb:14:in `call' rack (1.2.1) lib/rack/content_length.rb:13:in `call' rack (1.2.1) lib/rack/handler/webrick.rb:52:in `service' /home/force/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service' /home/force/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run' /home/force/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'
{"utf8"=>"✓",
"_method"=>"put",
"authenticity_token"=>"OvMUeM9hqfPASC0NS+Th07GELu6B+dQCCTtm3gWdJE4=",
"user"=>{"login"=>"local",
"new_password"=>"[FILTERED]",
"new_password_confirmation"=>"[FILTERED]",
"directory_id"=>"",
"admin"=>"0"},
"commit"=>"Update User",
"id"=>"13"}
如果您想尝试一下，可以在http://github.com/sidewaysmilk/deezy下载完整的来源，然后在app/controllers/users_controller.rb操作中修改@user.update_attributes params[:user]以使用update。< / p>
答案 0 :(得分：5)
行。我觉得真的很蠢。我很惊讶没人抓到这个。
在我的模型中，我命名了我的一个属性。 hash，所以要访问它，我会说@user.hash。
ActiveRecord :: Base #hash是already defined！
所以我搞砸了。当ActiveRecord尝试执行事务时，它试图设置类似
的值@user.hash = password_hash
ActiveRecord::Base#hash=需要一个整数，如果密码更改，password_hash输出一个String，否则输出nil。
所以永远不要命名列哈希！ 在选择列名时检查文档以避免冲突。
答案 1 :(得分：1)
如果没有完整的堆栈跟踪，很难说，但错误消息“无法将nil转换为整数”是您追踪的关键。同样，我们希望查看失败请求的日志。我认为日志的参数：行可能会解释这个问题。
下面更新：
你能成功地将相同的参数传递给rails控制台中的@ user.update_attributes吗？
rails console
user = User.find(42) # whatever a good test user's id is
user_params = {"login"=>"local", "new_password"=>"supersecret", "new_password_confirmation"=>"supersecret", "directory_id"=>"", "admin"=>"0"}
user.update_attributes!(user_params)
这有什么不同吗？
答案 2 :(得分：1)
看起来可能的问题是用户ID是主键，并且某种程度上正在尝试更新。如果您使用'bang version of update_attributes : update_attributes，会收到什么错误消息！？