不确定rails的祖先宝石是如何工作的

Question

我正在尝试使用我在观看Ryan Bates的祖先视频时发现的祖先宝石，所以我设置了我的东西，像这样:

迁移:

class CreateComments < ActiveRecord::Migration
  def change
    create_table :comments do |t|
      t.string :comment
      t.string :author
      t.integer :post_id
      t.string :ancestry
      t.index  :ancestry
      t.timestamps
    end
  end
end

模型:

class Comment < ActiveRecord::Base
  belongs_to :post
  has_ancestry
  validates :comment, presence: true, length: {minimum: 15}
  validates :author, presence: true
end

**控制器新动作:**

  def new
    post = Post.find_by(id: params[:post_id])
    post.comments.new(:ancenstry => params[:parent_id])
  end

所以我想我已经正确地设置了一切。但是当我运行以下测试时:

it "should create a nested comment for a post" do
  posted_comment = FactoryGirl.create(:comment, post_id: @post.id)
  post :create, :post_id => @post.id, comment: {author: @comment.author, comment: @comment.comment, parent_id: @comment.id}
  json = JSON.parse(response.body).to_json
  binding.pry
  parse_json(json, 'comment').to_json.should have_json_path('id')
end

并检查绑定后的json:

{
   "comment":{
      "id":9,
      "post_id":6,
      "author":"Adam",
      "comment":"Some Really long Valid Comment length of Something.",
      "ancestry":null
   }
}

祖先部分为空。我甚至尝试过将parent_id改为ancestry，但这也无济于事。有人知道我做错了什么吗?或者有什么想法吗?

Answer 1

post.comments.new(:ancenstry => params[:parent_id])

您的散列键拼写错误。