回形针上传并显示图像不起作用 [英] Paperclip upload and showing the image not working

问题描述

我在运行Ruby 2.3.3和Rails 5.1.4的Windows 7上安装了回形针-> 5.1和最新的ImageMagick.

I installed paperclip -> 5.1 and latest ImageMagick on Windows 7(yeah..i know) running Ruby 2.3.3 and Rails 5.1.4.

我按照回形针说明的建议安装了file.exe，并在"PATH"中添加了"C:\ Program Files(x86)\ GnuWin32 \ bin".

I installed file.exe as suggested by paperclip instructions and added 'C:\Program Files (x86)\GnuWin32\bin' to my PATH.

上传照片时出现以下错误:

When i upload my pictures i get the following error:

ActionController::RoutingError (No route matches [GET] "/images/medium/missing.png"):

当我尝试查看显示页面以查看图像时，出现以下错误:

and when i try to view the show page to see the images i get the following error:

ActionController::RoutingError (No route matches [GET] "/system/recipes/images/000/000/005/medium/Capture777.PNG"):

您能为我提供有关如何正确上传和显示图像的指导吗?我假设错误会提供一些输入.我尝试关注其他SO文章，但到目前为止没有任何帮助.

Can you give me guidance on how to properly upload my image and show it? I'm assuming the errors would give some input. I tried to follow other SO articles but nothing helped so far.

这是我的路线.rb

Rails.application.routes.draw do

  resources :recipes

  root "recipes#index"
end

---

这是我的控制器显示/新操作和find_recipe参数

---

Here is my controller show/new actions and find_recipe params

def show
  @recipe = find_recipe
end

def new
  @recipe = Recipe.new
end

private

def find_recipe
  @recipe = Recipe.find(params[:id])
end

def recipe_params
  params.require(:recipe).permit(:title, :description, :image)
end

---

这是我的模特

---

Here is my Model

class Recipe < ApplicationRecord
  has_attached_file :image, style: { :medium => "400x400#" }
  validates_attachment_content_type :image, content_type: /\Aimage\/.*\z/
end

---

这是我的show.html.haml

---

Here is my show.html.haml

= image_tag @recipe.image.url(:medium, class: "recipe_image")
%h1= @recipe.title
%p= @recipe.description
= link_to 'Back', root_path, class: 'btn btn-info'
= link_to 'Edit', edit_recipe_path, class: 'btn btn-primary'
= link_to 'Delete',recipe_path, method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn btn-danger'

---

这是我的_form.html.haml

---

Here is my _form.html.haml

= simple_form_for @recipe, html: { multipart: true } do |f|
- if @recipe.errors.any?
#errors
  %p
    = @recipe.errors.count
    Prevented this recipe from saving
  %ul
    - @recipe.errors.full_messages.each do |msg|
      %li = msg
.panel-body
= f.input :title, input_html: { class: 'form-control' }
= f.input :description, input_html: { class: 'form-control' }
= f.file_field :image, input_html: { class: 'form-control' }


= f.button :submit, class: 'btn btn-primary'

推荐答案

问题是您尝试使用样式选项的方式，它必须为styles，将其替换并重试:

The problem is the way you're trying to use the styles option, it must be styles, replace it and try again:

class Recipe < ApplicationRecord
  has_attached_file :image, styles: { medium: '400x400#' }
  validates_attachment_content_type :image, content_type: /\Aimage\/.*\z/
end

这使得Paperclip仅执行命令:

This makes Paperclip only execute the commands:

• Command :: file -b --mime开始交易
• Command :: file -b --mime创建副本

• Command :: file -b --mime to start the transaction
• Command :: file -b --mime to create a copy

相反:

• Command :: file -b --mime
• Command :: identify -format
• Command :: identify -format %m
• Command :: convert
• Command :: file -b --mime

• Command :: file -b --mime
• Command :: identify -format
• Command :: identify -format %m
• Command :: convert
• Command :: file -b --mime

因此，您无法通过:medium样式获取图像，但是可以访问其url并通过image标签显示它，但是样式无效.

Hence you can't get the image by the :medium style, but you can access its url and show it through an image tag, but styles won't work.

这篇关于回形针上传并显示图像不起作用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IT屋！