如何使用载波保存动态图像数量

问题描述

我将宝石 Carrierwave 与 fog 一起使用将我的图像上传到 AWS S3 。

I'm using gem Carrierwave with fog to upload my images to AWS S3.

现在，我有这样的静态记忆。

Right now, I have static memories like this.

class CreateImagePosts < ActiveRecord::Migration
  def change
    create_table :image_posts do |t|
      t.string :img1
      t.string :img2
      t.string :img3
      t.string :img4
      t.string :img5
      t.string :img6
      t.string :img7
      t.string :img8

      t.timestamps null: false
    end
  end
end

但是我想使上传动态数量的图像而不像当前设置（限于图片数量）。

But I want to make it possible to upload dynamic numbers of images not like present setting(limited in number of images).

我的模型如下。

class ImagePost < ActiveRecord::Base   

    mount_uploader :img1, S3uploaderUploader
    mount_uploader :img2, S3uploaderUploader
    mount_uploader :img3, S3uploaderUploader
    mount_uploader :img4, S3uploaderUploader
    mount_uploader :img5, S3uploaderUploader
    mount_uploader :img6, S3uploaderUploader
    mount_uploader :img7, S3uploaderUploader
    mount_uploader :img8, S3uploaderUploader

end

我能阅读的任何建议或文件吗？谢谢。

Any suggestions or documents that I can read? Thanks.

推荐答案

使用创建模型附件 has_many 关系：

Create model Attachment with has_many relation:

class ImagePost < ActiveRecord::Base
  has_many :attachments
end

class Attachment < ActiveRecord::Base
  belongs_to :image_post
  mount_uploader :img, S3uploaderUploader
end

迁移：

class CreateAttachments < ActiveRecord::Migration
  def change
    create_table :attachments do |t|
      t.integer :image_post_id
      t.string :img
    end
    add_index :attachments, :image_post_id
  end
end

现在您可以创建任意数量的图像：

Now you can create any number of images:

image_post = ImagePost.create
images.each do |image|
  image_post.attachments.create(img: image)
end

这篇关于如何使用载波保存动态图像数量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！