以has_many关系播种

Question

我试图使用与成分具有has_many关系的食谱来种植我的数据库.成分表有4行.但是我的代码却遇到了错误.这是我的代码.我对rails很新,但还没找到解决方案.我正在使用Rails 4和Postgres.

错误

rake aborted!
Ingredient(#xxxxxxx) expected, got Hash(#xxxxxxx)

Tasks: TOP => db:seed
(See full trace by running task with --trace)

食谱

class Recipe < ActiveRecord::Base
   attr_accessible :title, :descrition, :image
   has_many :ingredients
   accepts_nested_attributes_for :ingredients
end

成分

class Ingredient < ActiveRecord::Base
   attr_accessible :measure, :modifier, :item, :note
   belongs_to :recipe
end

Seed.rb(这里的例子有2种成分,每种成分的每一行都有含量)

Recipe.create(
[{
    title: "Recipe title here", 
    description: "This is the description", 
    image: "theimage.jpg", 
    ingredients_attributes: [{measure: "1cup", modifier: "canned", item: "Mushrooms", note: "drained"}, {measure: "1lb", modifier: "sliced", item: "Bacon", note: "previously cooked"},]
}], 
without_protection: true)

Answer 1

你可以这样做:

recipe = Recipe.create({
    title: "Recipe title here", 
    description: "This is the description", 
    image: "theimage.jpg"})

recipe.ingredients.create(measure: "1cup", modifier: "canned", item: "Mushrooms", note: "drained")
recipe.ingredients.create(measure: "1lb", modifier: "sliced", item: "Bacon", note: "previously cooked"})