Question

我试图在我的Rails项目中使用acts_as_taggable gem，但我不知道是否有人可以指出我做错了什么，或者项目中是否有错误。

我已经向该项目提出了问题：https://github.com/mbleigh/acts-as-taggable-on/issues/688虽然还没有人回复。

我无法使用添加标签的基本功能，例如：taglist.add("a")或taglist.remove("a)或使用taglist = 'a'设置标签等。这些方法似乎不存在。< / p>

我正在使用Ruby 2.2.3和Rails 4.2.3。我的gemfile有：

gem 'acts-as-taggable-on', '~> 3.4' 我也试过了

gem 'acts-as-taggable-on', '~> 3.5' 在我的模型中，我有：

class Space < ActiveRecord::Base
  acts_as_taggable_on :skills

从rails控制台我可以执行以下操作：

> s = Space.first
 => #<Space id: 1172, created_at: "2015-09-24 08:13:09", ...<many fields>... updated_at: "2015-09-24 08:13:09"> 

> s.skills
  ActsAsTaggableOn::Tag Load (2.0ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = $1 AND "taggings"."taggable_type" = $2 AND "taggings"."context" = $3  [["taggable_id", 1172], ["taggable_type", "Space"], ["context", "skills"]]

=＆GT; ＃

> s.skills.add("a")
NoMethodError: undefined method `add' for #     <ActiveRecord::Associations::CollectionProxy []>
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activerecord-4.2.3/lib/active_record/relation/delegation.rb:136:in `method_missing'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activerecord-4.2.3/lib/active_record/relation/delegation.rb:99:in `method_missing'
from (irb):3
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/railties-4.2.3/lib/rails/commands/console.rb:110:in `start'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/railties-4.2.3/lib/rails/commands/console.rb:9:in `start'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:68:in `console'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/railties-4.2.3/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/railties-4.2.3/lib/rails/commands.rb:17:in `<top (required)>'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `block in require'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:274:in `require'
from /Users/n/code/pop/poprails/bin/rails:8:in `<top (required)>'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `load'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `block in load'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:240:in `load_dependency'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/activesupport-4.2.3/lib/active_support/dependencies.rb:268:in `load'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/commands/rails.rb:6:in `call'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/command_wrapper.rb:38:in `call'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/application.rb:183:in `block in serve'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/application.rb:156:in `fork'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/application.rb:156:in `serve'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/application.rb:131:in `block in run'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/application.rb:125:in `loop'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/application.rb:125:in `run'
from /Users/n/.rvm/gems/ruby-2.2.3@poprails/gems/spring-1.3.6/lib/spring/application/boot.rb:18:in `<top (required)>'
from /Users/n/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/n/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from -e:1:in `<main>'2.2.3 :004

Answer 1

应该是

> s = Space.first
 => #<Space id: 1172, created_at: "2015-09-24 08:13:09", ...<many fields>... updated_at: "2015-09-24 08:13:09"> 

> s.skill_list.add("a")

或逗号

> s.skill_list.add("a,b,n,m)

然后

s.skill_list

它将返回

数组

  ["a","b","n","m"]

Answer 2

试

s.skills.where(name: "a").first_or_create

或

s.skill_list.add("a")

acts_as_taggable_on：NoMethodError：未定义的方法`add＆＃39;

2 个答案: