robie lee liwh

今天，对多个实体查询去重，发现直接用uniq就可以了，如:
Conversation.search(:params[:search]).uniq.paginate
就行了，而且有分页的效果，但是：查看后台日志中的sql语句，并没有看到其产生limit语句。为什么却实现了分页？

重新更新了一次cucumber,发现在定义step的时候，还不能带空格了。如：
那么 /我能看到:(.+)/ do |text|
response.should contain(text)
end

定义行为为：
那么我能看到: 某某某
会报错
而把空格去掉就对了。。

1.验证字段的时候，如果允许为空值得加上:allow_nil => true,如：



 :validates_length_of :content,:maxinum => 200

 #直接用modelname.create(:content=> nil)会出错，得加上:allow_nil => true

2.fixtures里面，如果某字段值设置为ture,在mysql 里显示的是1

	when we use the plugin act_as_ferret,got the exception
	EOFError in 'DestroysController save destroy require reason'
	End-of-File Error occured at <except.c>:117 in xpop_context
	Error occured in store.c:216 - is_refill
	current pos = 0, file length = 0

	we should do this :
	script/console test
	>> MyModel.rebuild_index

	app/models/department_duties.rb
	class DepartmentDuties < ActiveRecord::Base
	include UuidHelper
	index :id
	belongs_to :department, :class_name => "Department"
	#创建人,修改人
	belongs_to :creator, :class_name => "User"
	belongs_to :modifier, :class_name => "User"
	end

	Fetching source index for http://rubygems.org/
	fatal: Needed a single revision
	Updating git://github.com/saberma/acts_as_list_mongoid.git
	fatal: Failed to resolve '55e2342' as a valid ref.
	An error has occurred in git when running `git reset --hard 55e2342. Cannot complete bundling.

	Sometimes,when we remove some gem,but got some error like this:
	gem uninstall ***
	ERROR: While executing gem ... (NoMethodError)
	undefined method `name' for nil:NilClass

	This is a error in gem 1.3.4. so we should update the gem version.we should update the gem version to 1.3.5 to correct the problem.
	gem install rubygems-update -v 1.3.5
	update_rubygems --no-ri --no-rdoc

	>> ActionWebService
	=> ActionWebService
	>> ActionWebService::Dispatcher
	=> ActionWebService::Dispatcher
	>> ActionWebService::Dispatcher::ActionController
	=> ActionWebService::Dispatcher::ActionController
	>> ActionWebService::Dispatcher::ActionController::Base
	NameError: uninitialized constant ActionWebService::Dispatcher::ActionController::Base
	from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:443:in `load_missing_constant'
	from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:80:in `rake_original_const_missing'

	今天，在启动 mysql 进程的时候，sudo /etc/init.d/mysql restart
	发生如下问题:/etc/init.d/mysql[19729]: ERROR: The partition with /var/lib/mysql is too full!
	后来发现，原来用df 命令，发现，原来是磁盘满了导致的