如何一步一步建立带有子工厂的父级以通过验证 [英] How to build a parent with child factory in one step in order to pass validation

问题描述

项目必须至少同时创建一个任务，以确保通过验证.这是我用来验证这一点的代码段:

Projects must have at least one task created at the same time to ensure the validation passes. This is the snippet I use to validate this:

class Project < ActiveRecord::Base
  validates :tasks, :length => { :minimum => 1 }
  ...
end

我所面临的挑战是创建合适的工厂，以使用FactoryGirl来构建一个具有预先任务的项目.我正在使用:

The challenge I'm having is create the right factory to build a project with task upfront using FactoryGirl. I'm using:

FactoryGirl.define do

  factory :task do
    name "Get this test passing"
    project
  end

  factory :project do
    title "Complete the application"
    factory :project_with_tasks do
      ignore do
        tasks_count 5
      end

      after(:create) do |project, evaluator|
        FactoryGirl.create_list(:task, evaluator.tasks_count, project: project)
      end
    end
  end

end

现在的问题是，这实际上失败了，因为它实际上创建了项目，然后尝试创建关联的任务.错误报告为:

Now the problem is this fails as it actually creates the project, then tries to create the associated task. The error is reported as:

Failure/Error: project = FactoryGirl.create(:project_with_tasks, tasks_count: 2)
 ActiveRecord::RecordInvalid:
   Validation failed: Projects must have at least one task

将其转换为before(:create)表示该项目不可引用.

Turning it into before(:create) means the project isn't available to reference.

任何帮助将不胜感激！

推荐答案

我最终通过以下方式建立工厂来让它通过:

I ended up getting it passing by building the factory in the following way:

project = FactoryGirl.build(:project)  
project.tasks << FactoryGirl.create(:task)  
project.save

这会在完成保存之前将任务添加到项目中.

This adds the task to the project before a save is done.

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