Guide[Rails 6.0]

• Setup

   rails active_storage:install
   rails db:migrate
   # in config/storage.yml, setup cloud if you want, I just want to use local first
   # in environments/development.rb[production.rb], set
   config.active_storage.service = :local
   # need public:true for local? Not work, error. It seems always public. 
  

• Add avatar to User

  • in models/user.rb

  has_one_attached :avatar
  

  • in views

  <%= f.file_field :avatar,  class: "form-control" %>
  

  • in controllers

  # add permit to params
  params.permit(:name, :password, :password_confirmation, :email, :avatar)
  # remove avatar if necessary
  if @user.avatar.attached? && uparams[:avatar].present?
    @user.avatar.purge_later
  end
  

  • show the avatar

  <%= image_tag @user.avatar, style: 'width:20%;height:auto' if @user.avatar.attached? %>
  

  • Once a file uploaded, it's located in storage directory, e.g. storage/ky/b0/kyb05r52e6l8kr6l4pfytggq6lks
  • In config/deploy.rb, add storage to linked_dir

• FileCenter

  • Folder Model: name, note, parent (for nested, could be null).
  • Document Model: folder(null for root), note, has_one_attached:file
  • Folder Controller & Views
    • index: for showing root directory folders and documents,
    • show: for showing specific directory folders and documents
    • new: for new folder
    • update: for rename
    • destroy: for delete, destroy recursively by model.
  • Document Controller & Views
    • new: for upload file. Redirect to folder
    • update: for rename note ? Redirect to folder
    • destroy: delete. Redirect to folder
  • Move document/folder to other folders
    • A folder can't move to its children and so on
    • A document can be moved to any folder
  • Upload multiple files
    • details
  • Download directory
    • details
  • Upload directory: TODO