ruby-on-rails - Rails ActiveStorage 错误 - MessageVerifier-InvalidSignature

Question

我正在开展一个项目，该项目需要在 Location 模型上使用 ActiveStorage has_many_attached :photos 情况。

我在下面设置了代码，但是在尝试上传表单时，我收到以下错误:

ActiveSupport::MessageVerifier::InvalidSignature in 
                                 LocationsController#attach_photo

这是将文件“添加”到特定父记录(即 Location 记录)的附件集中的方法吗？

位置模型

class Location < ApplicationRecord
  ...
  has_many_attached :photos
  ...
end

位置 Controller

class LocationsController < ApplicationController
  ...
  def attach_photo
    @location = Location.find(params[:id])
    @location.photos.attach(params[:photo])
    redirect_to location_path(@location)
  end
  ...
end

查看

<%= form_tag attach_photo_location_path(@location) do %>
  <%= label_tag :photo %>
  <%= file_field_tag :photo %>

  <%= submit_tag "Upload" %>
<% end %>

查看

resources :locations do
  member do
    post :attach_photo
  end
end

Answer 1

确保在 form_tag 中添加 multipart: true。它生成 enctype="multipart/form-data"。

form_tag 默认不负责，必须有(如果附加文件)。

multipart/form-data No characters are encoded. This value is required when you are using forms that have a file upload control

表格:

<%= form_tag attach_photo_location_path(@location), method: :put, multipart: true do %>
  <%= label_tag :photo %>
  <%= file_field_tag :photo %>

  <%= submit_tag "Upload" %>
<% end %>

还有:

将 post 更改为 put 方法，我们正在更新而不是创建 Idempotency

resources :locations do
  member do
    put :attach_photo
  end
end