如何db:播放我的act-as-taggable-on标签?

时间:2011-06-20 15:29:54

标签: ruby-on-rails acts-as-taggable-on

我正在尝试在我的数据库中创建大量标签,是否有人知道如何使用gem acts-as-taggable-on执行此操作?

产品表:

create_table :products do |t|
   t.string :name
   t.date :date
   t.decimal  :price, :default => 0, :precision => 10, :scale => 2
   t.integer :user_id
end

并且 :tag_list字段是由ActsAsTaggableOn的迁移创建的虚拟列

class ActsAsTaggableOnMigration < ActiveRecord::Migration
  def self.up
    create_table :tags do |t|
      t.string :name
    end

    create_table :taggings do |t|
      t.references :tag

      # You should make sure that the column created is
      # long enough to store the required class names.
      t.references :taggable, :polymorphic => true
      t.references :tagger, :polymorphic => true

      t.string :context

      t.datetime :created_at
    end

    add_index :taggings, :tag_id
    add_index :taggings, [:taggable_id, :taggable_type, :context]
  end

  def self.down
    drop_table :taggings
    drop_table :tags
  end
end

这是我 products / form.html.erb

中的:tag_list字段
<div class="field">
    <%= f.label :tag_list %>:
    <%= f.text_field :tag_list %>
</div>

我试着这样做......

Product.create([
  {:tag_list => 'Foods'},
  {:tag_list => 'Electronics'},
  {:tag_list => 'Pizza'},
  {:tag_list => 'Groceries'},
  {:tag_list => 'Walmart'},
  {:tag_list => 'Apples'},
  {:tag_list => 'Oranges'} ])

但是我缺乏RoR技能告诉我这是错误的方式,我需要帮助,有什么建议吗?

2 个答案:

答案 0 :(得分:11)

你可以在你的种子中尝试这个.rb:

list = ['tag 1', 'tag 2', ...]

list.each do |tag|
  ActsAsTaggableOn::Tag.new(:name => tag).save
end

显然,将列表数组的值替换为所需的标记。

注意:这只会填充标签表。我希望这就是你要找的东西。

希望这有帮助!

答案 1 :(得分:0)

您可以使用以下内容在种子文件中创建一些测试产品:

unless Rails.env.production?
  1..20.times.each do |n|
    Product.create(
      name: "Some product #{n}",
      date: Date.today - n.days,
      price: 1_000_000 + n,
      user: User.first
    )
  end
end

所以你可以通过这样做来标记标签

# ...
  product = Product.create(
    # ...
  )
  product.tag_list.add "tag1", "tag2"
  product.save
# ...

或者

# ...
  Product.create(
    # ...
  ).tap do |product|
    product.tag_list.add "tag1", "tag2"
    product.save
  end
# ...