活动存储has_many_attached正在清除以前的上载

class User < ApplicationRecord
  has_many_attached :photos
end

user = User.new
user.photos.attach(io: File.open('/path/to/file'), filename: 'file.jpg')
user.save

user = User.find(1)
user.photos.attach(io: File.open('/path/to/new_file'), filename: 'new_file.jpg')
user.save

class AddPhotosToUsers < ActiveRecord::Migration[6.0]
  def change
    add_column :users, :photos, :jsonb, default: {}, null: false
  end
end

local:
  service: Disk
  root: <%= Rails.root.join("storage") %>

user = User.find(1)
puts user.photos.attachments.inspect

# app/models/user.rb
class User < ApplicationRecord
  has_many_attached :photos
end

# db/migrate/xxxx_add_photos_to_users.rb
class AddPhotosToUsers < ActiveRecord::Migration[6.0]
  def change
    add_column :users, :photos, :jsonb, default: {}, null: false
  end
end

# config/storage.yml
local:
  service: Disk
  root: <%= Rails.root.join("storage") %>

# 在控制器中
def update
  @user = User.find(params[:id])
  if @user.update(user_params)
    redirect_to @user, notice: 'User was successfully updated.'
  else
    render :edit
  end
end

private

def user_params
  params.require(:user).permit(:name, photos: [])
end