RSpecとFactoryGirlは初めてで、この戦いに負けました!
プロパティの1つを検証する結合テーブルMealItemsがあります。Railsコンソールでは、次のことを正常に実行できます。
meal = Meal.create!( ... )
food = Food.create!( ... )
item1 = MealItem.create!( meal, food, 1234 ) # 1234 being the property that is required
次に、次のようにMealItemを介して、特定の食事に含まれる一連の食品を自動的に取得できます。
meal.foods
問題は、ファクトリを適切に作成する方法がわからないため、この関係が仕様で利用できることです。アイテムを食事に割り当ててテストすることはできますが、関係が機能しているためにhas_manyを取得できません(meal.foods)
モデル
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
spec / factorys.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
spec / models / 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
...
私の質問は:
結合テーブルの検証要件のために食品を食事に直接割り当てることができないため、テストでMeal.foodsを参照できるようにこれらのファクトリをどのように設定しますか。テスト中にMealItemファクトリをDBに適切に書き込んでいませんか?そのため、has_many throughリレーションシップが仕様に存在しませんか?
どんな助けでも大歓迎です。