Rails驗證發佈日期僅在發佈時才存在

Question

我想確保在用戶決定發佈文章時爲發佈日期設置發佈日期。

我有這樣的：

class Article < ApplicationRecord 
    before_validation :check_published 

    validates :publish_date, presence: true, if: :article_published? 

    def check_published 
    self.publish_date = Time.now if self.published 
    end 

    def article_published? 
    self.published 
    end 
end 

在我的文章模型測試文件：

require 'test_helper' 

class ArticleTest < ActiveSupport::TestCase 
    def setup 
    @new_article = { 
     title: "Car Parks", 
     description: "Build new car parks", 
     published: true 
    } 
    end 

    test "Article Model: newly created article with published true should have publish date" do 
    article = Article.new(@new_article) 
    puts "article title: #{article.title}" 
    puts "article published: #{article.published}" 
    puts "article publish date: #{article.publish_date}" 
    assert article.publish_date != nil 
    end 
end 

測試失敗。

是我在做什麼可能，或者我需要在控制器中做到這一點？

Answer 1

article = Article.new(@new_article)不保存文章對象到數據庫，它只是創建一個文章對象。並且publish_date驗證沒有運行。嘗試設置：

article = Article.create(@new_article)