如何引用seeds.rb中的图像

Question

我使用Carrierwave上传与我的User模型相关联的图像，该模型具有相应的picture属性，该属性包含字符串字段中图像文件的名称。通常，上传图片的名称存储在public/uploads中。现在，我想用样本用户来开发我的开发数据库，包括相关的配置文件图片路径。我试图在pic1.jpg存储我的pic2.jpg，pic3.jpg，public/images图片，并参考db/seeds.rb中的这些图片作为picture: '/images/pic1.jpg'等，就像Grant Neufeld在old stackoverflow question中提出的那样。在视图中使用以下代码包含图片：

<%= image_tag @user.picture.url if @user.picture? %>

但是这不起作用，图像未加载到视图中，因为图片属性为零。我还尝试将我的照片存储在app/assets/images中，并将它们作为picture: 'pic1.jpg'，picture: 'pic2.jpg'，picture: 'pic3.jpg'在db/seeds.rb中引用而没有结果。

下面是我的db/seeds.rb文件：

User.create!(name:  "Example User",
         email: "example@railstutorial.org",
         password:              "foobar",
         password_confirmation: "foobar",
         admin: true,
         politics: 'left',
         car: true,
         pets: 'I like horses and bears',
         music: 'American country and folk',
         picture: 'pic1.jpg',
         profile: 'I like music and the Ruby and Python programming languages',
         activated: true,
         activated_at: Time.zone.now)

User.create!(name:  "Super-friendly User",
        email: "example-101@railstutorial.org",
        password:              "PassWord-0",
        password_confirmation: "PassWord-0",
        admin: true,
        smoker: true,
        politics: 'left',
        car: true,
        pets: 'I like turtles and whales',
        car_pets: true,
        music: 'Jazz and blues',
        picture: 'pic2.jpg',
        profile: 'I like music and drinking',
        activated: true,
        activated_at: Time.zone.now)

User.create!(name:  "Friendly User",
        email: "example-102@railstutorial.org",
        password:              "PassWord-0",
        password_confirmation: "PassWord-0",
        politics: 'right',
        car: true,
        pets: 'I like snakes and gorillas',
        music: 'pop and classics',
        picture: 'pic3.jpg',
        profile: 'I like music and hiking',
        activated: true,
        activated_at: Time.zone.now)

99.times do |n|
  name  = Faker::Name.name
  email = "example-#{n+1}@railstutorial.org"
  password = "password"
  User.create!(name:  name,
           email: email,
           password:              password,
           password_confirmation: password,
           activated: true,
           activated_at: Time.zone.now)
end