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RSpec和Factory Girl的新手，並放棄這場戰鬥！測試has_many通過驗證使用RSpc 2.9.0 + FactoryGirl 3.2
我有一個連接表MealItems其中的一個屬性驗證。在軌控制檯我可以成功做到以下幾點：
meal = Meal.create!(...)
food = Food.create!(...)
item1 = MealItem.create!(meal, food, 1234) # 1234 being the property that is required
然後我就可以自動地通過MealItem獲得食物的陣列在一個給定餐是這樣的：
meal.foods
的問題是，我不能瞭解如何正確地創建工廠，以便在規範中提供這種關係。我可以指定項目一頓飯，並測試這些，而是通過關係工作（meal.foods）不能得到的has_many
模式
class Meal < ActiveRecord::Base
has_many :meal_items
has_many :foods, :through => :meal_items
end
class MealItem < ActiveRecord::Base
belongs_to :meal
belongs_to :food
validates_numericality_of :serving_size, :presence => true,
:greater_than => 0
end
class Food < ActiveRecord::Base
has_many :meal_items
has_many :meals, :through => :meal_items
end
規格/ factories.rb
FactoryGirl.define do
factory :lunch, class: Meal do
name "Lunch"
eaten_at Time.now
end
factory :chicken, class: Food do
name "Western Family Bonless Chicken Breast"
serving_size 100
calories 100
fat 2.5
carbohydrates 0
protein 19
end
factory :cheese, class: Food do
name "Armstrong Light Cheddar"
serving_size 30
calories 90
fat 6
carbohydrates 0
protein 8
end
factory :bread, class: Food do
name "'The Big 16' Multigrain Bread"
serving_size 38
calories 100
fat 1
carbohydrates 17
protein 6
end
factory :item1, class: MealItem do
serving_size 100
association :meal, factory: :lunch
association :food, factory: :chicken
end
factory :item2, class: MealItem do
serving_size 15
association :meal, factory: :lunch
association :food, factory: :cheese
end
factory :item3, class: MealItem do
serving_size 76
association :food, factory: :bread
association :meal, factory: :lunch
end
factory :meal_with_foods, :parent => :lunch do |lunch|
lunch.meal_items { |food| [ food.association(:item1),
food.association(:item2),
food.association(:item3)
]}
end
end
規格/型號/ meal_spec.rb
...
describe "Nutritional Information" do
before(:each) do
#@lunch = FactoryGirl.create(:meal_with_foods)
@item1 = FactoryGirl.create(:item1)
@item2 = FactoryGirl.create(:item2)
@item3 = FactoryGirl.create(:item3)
@meal = FactoryGirl.create(:lunch)
@meal.meal_items << @item1
@meal.meal_items << @item2
@meal.meal_items << @item3
@total_cals = BigDecimal('345')
@total_fat = BigDecimal('7.5')
@total_carbs = BigDecimal('34')
@total_protein = BigDecimal('35')
end
# Would really like to have
#it "should have the right foods through meal_items" do
#@meal.foods[0].should == @item1.food
#end
it "should have the right foods through meal_items" do
@meal.meal_items[0].food.should == @item1.food
end
it "should have the right amount of calories" do
@meal.calories.should == @total_cals
end
...
我的問題是：
我將如何設置這些工廠，所以我可以引用Meal.foods在我的測試，我不能直接分配食物，吃飯的，因爲在連接表驗證要求。我在測試過程中沒有正確地將MealItem工廠寫入數據庫，這就是爲什麼我的規範中不存在has_many through關係的原因？
任何幫助，非常感謝。