ruby-on-rails - RSpec:关联对象的工厂定义

Question

我有以下三个型号:Product , Warehouse和 Inventory

# app/models/product.rb
class Product < ApplicationRecord
  has_many :inventories
  has_many :warehouses, through: :inventories  
end

# app/models/warehouse.rb
class Warehouse < ApplicationRecord
  has_many :inventories
  has_many :products, through: :inventories
end

# app/models/inventory.rb
class Inventory < ApplicationRecord
  belongs_to :product
  belongs_to :warehouse
end

我有这个库存工厂:

FactoryBot.define do
  factory :inventory do
    product { nil }
    warehouse { nil }
    item_count { 1 }
    low_item_threshold { 1 }
  end
end

我如何将这个工厂用于库存，或者我的其他工厂需要进行哪些更改，以便我可以拥有这样的规范？

RSpec.describe Inventory, type: :model do
  it "has a valid factory" do
   expect(FactoryBot.build(:inventory)).to be_valid
  end
end

Answer 1

您需要的是更改:inventory工厂定义，像这样

FactoryBot.define do
  factory :inventory do
    product
    warehouse
    item_count { 1 }
    low_item_threshold { 1 }
  end
end

这将“告诉”工厂机器人实例化关联的对象( https://github.com/thoughtbot/factory_bot/blob/master/GETTING_STARTED.md#associations )
但要使其正常工作，您需要定义 warehouse和 product工厂。