我应该在哪里把图像放在一个heroku rails应用程序中？

我有一个iOS api链接到rails应用程序。我已经发送了一个iOS应用程序的图像，我试图将其存储为header_img，但是我得到的错误是它们不是公共目录。在我的heroku API中指定图像的好路径是什么？我应该在哪里把图像放在一个heroku rails应用程序中？

这里是Heroku的错误：

2014-04-04T21:51:47.179916+00:00 app[web.1]: 
2014-04-04T21:51:47.179916+00:00 app[web.1]: Errno::EISDIR (Is a directory - public/header_img/): 
2014-04-04T21:51:47.179916+00:00 app[web.1]: app/controllers/groups_controller.rb:98:in `initialize' 
2014-04-04T21:51:47.179916+00:00 app[web.1]: app/controllers/groups_controller.rb:98:in `open' 
2014-04-04T21:51:47.179916+00:00 app[web.1]: app/controllers/groups_controller.rb:98:in `upload_header_img' 
2014-04-04T21:51:47.179916+00:00 app[web.1]: app/controllers/groups_controller.rb:44:in `create'

这里是我的组控制器：

class GroupsController < ApplicationController 
    # GET /groups 
    # GET /groups.json 

    before_filter :require_auth 

    def index 
    @privategroups = @user.groups 
    @publicgroups = @user.followees(Group) 

    @groups = (@privategroups + @publicgroups).sort_by(&:created_at).reverse 
    end 

    # GET /groups/1 
    # GET /groups/1.json 
    def show 
    @group = Group.find(params[:id]) 
    @posts = @group.posts 
    end 

    # GET /groups/new 
    # GET /groups/new.json 
    def new 
    @group = Group.new 

    respond_to do |format| 
     format.html # new.html.erb 
     format.json { render json: @group } 
    end 
    end 

    # GET /groups/1/edit 
    def edit 
    @group = Group.find(params[:id]) 
    end 

    # POST /groups 
    # POST /groups.json 
    def create 
    @group = Group.new(params[:group]) 
    @group.owner_id = @user.id 
    header_img = @group.header_img || @group.decode_header_img_data 
    if header_img.present? 
     upload_header_img(header_img) 
    end 

    respond_to do |format| 
     if @group.save 
     @membership = @user.memberships.build(group_id: @group.id) 
     @membership.save 
     format.html { redirect_to @group, notice: 'Group was successfully created.' } 
     format.json { render json: @group, status: :created, location: @group } 
     else 
     format.html { render action: "new" } 
     format.json { render json: @group.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # PUT /groups/1 
    # PUT /groups/1.json 
    def update 
    @group = Group.find(params[:id]) 

    respond_to do |format| 
     if @group.update_attributes(params[:group]) 
     format.html { redirect_to @group, notice: 'Group was successfully updated.' } 
     format.json { head :no_content } 
     else 
     format.html { render action: "edit" } 
     format.json { render json: @group.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # DELETE /groups/1 
    # DELETE /groups/1.json 
    def destroy 
    @group = Group.find(params[:id]) 
    @group.destroy 

    respond_to do |format| 
     format.html { redirect_to groups_url } 
     format.json { head :no_content } 
    end 
    end 

    private 
    def upload_header_img(header_img_io)   
     # upload to the exact location account id and extension 
     extension = File.extname(header_img_io.original_filename) 
     # rails take public as root directory 
     # under the root directory (public) 
     # there are a icon directory 
     header_img_url = "/header_img/"[email protected]_s + extension 

     # open in binary mode 
     File.open("public"+header_img_url,'wb') do |file| 
     file.write(header_img_io.read) 
     end 

     @group.update_attribute(:header_img_url, header_img_url) 
    end 
end

来源

2014-04-04 jckly

您可以创建在“/ tmp目录”的文件夹，但请记住图像将请求后销毁做完了。如果您想存储图片，则需要上传到AWS或其他存储站点。 – ChrisBarthol

虽然我不能提供一个直接的答案，我有一些想法，这可能有助于：

According to Heroku，它们运行一个只读文件系统：

Your app is compiled into a slug for fast distribution by the dyno manager. The filesystem for the slug is read-only, which means you cannot dynamically write to the filesystem for semi-permanent storage. The following types of behaviors are not supported:

Caching pages in the public directory

Saving uploaded assets to local disk (e.g. with attachment_fu or paperclip)

Writing full-text indexes with Ferret Writing to a filesystem database like SQLite or GDBM

Accessing a git repo for an app like git-wiki

修正

以来发现上面是他们Bamboo堆栈（旧）。该cedar stack (new) supports temporary file writing：

Each dyno gets its own ephemeral filesystem, with a fresh copy of the most recently deployed code. During the dyno’s lifetime its running processes can use the filesystem as a temporary scratchpad, but no files that are written are visible to processes in any other dyno and any files written will be discarded the moment the dyno is stopped or restarted.

我们做使用回形针&上传的Heroku（在测试时），它通常不支持和任何文件将每次覆盖您重新部署应用

存储

ChrisBarthol给了一个很好的suggestio n - 在S3或其他第三方系统上存储任何user-submitted资产。我会进一步说，你可能会使用Paperclip保存文件大汗受益：

#app/models/group.rb 
Class Group < ActiveRecord::Base 
    has_attached_file :header_img 
     :storage => :s3, 
     :s3_credentials => Proc.new{|a| a.instance.s3_credentials } 

    validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/ 
end

来源

2014-04-05 11:08:36

我应该在哪里把图像放在一个heroku rails应用程序中？

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