Question

我正在编写Rspec requests spec，在此之前我想使用FactoryBot构建一些测试数据。

现在我有一个模型Game：

class Game < ApplicationRecord
  has_many :game_levels

和模型GameLevel：

class GameLevel < ApplicationRecord
  belongs_to :game

在我的/spec/factories/game.rb中：

FactoryBot.define do
  factory :game do
    name { :Mario }
  end
end

在我的spec/factories/game_level.rb中：

FactoryBot.define do
  factory :game_level do
    name { :default }
    min_level { 0 }
    max_level { 100 }

    game
  end
end

在我的spec/requests/user_plays_game_spec.rb中，我只编写了代码来创建game＆game_level，然后打印了game.id，game_level.game_id。我发现它们不一样。此外，game.game_levels返回nil。

before(:all) do
  @game = create(:game)
  @game_level = create(:game_level)
end

describe do
  it do
    puts @game,id, @game_level.game_id
    puts @game.game_levels

    expect(@game.id).to eql(@game_level.game_id)
  end
end

那么如何使用belongs_to将has_many记录与FactoryBot记录关联？

Answer 1

您可以在创建过程中将其关联

extension ViewController : FetchedResultsControllerManagerDelegate {
    func managerDidChangeContent(_ controller: NSObject, change: FetchedResultsControllerManagerChange) {
        change.applyChanges(collectionView: collectionView)
    }
}

Answer 2

工厂协会很直观：

# Loading data
data(mtcars)
# Manual transmission (am = 1) depends on 1/4 mile time (qsec) and miles/(US) gallon (mpg)
glmfit <- glm(am ~ qsec + mpg, data = mtcars, binomial)
mtcars$fitted_am <- glmfit$fitted.values
# Loading packages
library(plotROC)
library(ggplot2)
library(pROC)
# Calculating ROC curve, AUC and threshold according to Youden index
rocfit <- roc(mtcars$am, mtcars$fitted_am)
auc(rocfit)
coords(rocfit, x = "b")
basicplot <- ggplot(mtcars, aes(d = am, m = fitted_am))
basicplot + 
  geom_roc() + 
  style_roc(theme = theme_grey) +
  theme(axis.text = element_text(colour = "blue")) +
  ggtitle("Automatic transmission prediction") +
  scale_x_continuous("1 - Specificity", breaks = seq(0, 1, by = .1))
plot(rocfit)
prop.table(table(mtcars$am))

没有幻想。如果它不适合您，则可能是配置问题。

使用FactoryBot查询有关创建has_many和belongs_to记录的查询

2 个答案: