我正在使用Carrierwave,Fog将图像上传到S3.
问题是,当我去编辑一个记录时,“文件”和& “照片”字段自动变为空白.因此,如果我想保留记录中的图像或文件,我必须重新上传它.
否则,会发生什么是上传的文件/图像消失了.我甚至不确定它是否从S3中删除,但与我在db中的记录的关联消失了.
这是我的Post模型的SimpleForm _form.html.erb partial：
<%= simple_form_for(@post,html: {class: 'form-horizontal' }) do |f| %>
<%= f.error_notification %>
<%= f.input_field :title,placeholder: "Enter Title" %>
<%= f.input_field :body,id: "body-field",placeholder: "Provide all the facts." %>
<%= f.input_field :photo %>
<%= f.input_field :file %>
<%= f.button :submit,class: "btn btn-primary pull-left" %>
<% end %>
这是我的PhotoUploader
class PhotoUploader < CarrierWave::Uploader::Base
include CarrierWave::RMagick
storage :fog
include CarrierWave::MimeTypes
process :set_content_type
def store_dir
"images/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
version :main_thumb_mobile do
process :resize_to_fit => [52,52]
end
version :main_thumb do
process :resize_to_fit => [150,150]
end
version :post_thumb do
process :resize_to_fit => [200,200]
end
version :large do
process :resize_to_limit => [400,400]
end
def extension_white_list
%w(jpg jpeg gif png)
end
end
这是我的FileUploader
class FileUploader < CarrierWave::Uploader::Base
storage :fog
def store_dir
"files/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
def extension_white_list
%w(pdf doc docx xls xlsx ppt pptx txt mp4 m4v mov avi mkv mp3 wav)
end
end
这是我的帖子的架构：
# == Schema Information # truncated for brevity # Table name: posts # # id :integer not null,primary key # title :text # photo :string(255) # body :text # user_id :integer # file :string(255)
编辑1
这是我的Post.rb：
# == Schema Information
#
# Table name: posts
#
# id :integer not null,primary key
# title :text
# photo :string(255)
# body :text
# created_at :datetime
# updated_at :datetime
# user_id :integer
# ancestry :string(255)
# file :string(255)
# status :integer default(0)
# slug :string(255)
# publication_status :integer default(0)
# has_eyewitness :boolean default(FALSE)
# youtube_embed_code :text
# soundcloud_embed_code :text
#
class Post < ActiveRecord::Base
has_ancestry
belongs_to :user
resourcify
enum status: [ :unconfirmed,:corroborated,:confirmed ]
enum publication_status: [ :unpublished,:published ]
extend FriendlyId
friendly_id :title,use: [:slugged,:history,:finders]
attr_accessor :country
mount_uploader :photo,PhotoUploader
mount_uploader :file,FileUploader
validates_presence_of :body
validates_length_of :body,maximum: 150,too_long: 'The report must be less than 150 words.',tokenizer: ->(str) { str.scan(/\w+/) }
validates_length_of :title,maximum: 7,too_long: 'The title must be less than 7 words.',tokenizer: ->(str) { str.scan(/\w+/) }
def publish
published!
end
def unpublish
unpublished!
end
def is_published?
if self.published?
"yes"
else
"no"
end
end
end
编辑2
我将f.input_field：我的表单中的照片更改为f.file_field：照片按照jaspreet的建议,它仍然无法正常工作.这是我更新请求的日志：
Started PATCH "/posts/ognr-takes-over-amcham-6a6f01ba-a9f9-44d5-924a-72f666f20ca8" for 127.0.0.1 at 2014-12-28 13:51:38 -0500
Processing by PostsController#update as HTML
Parameters: {"utf8"=>"✓","authenticity_token"=>"S7FOq956fox6XYpar7Yd6V7AL+bwypQQxZktjHW3PNc=","post"=>{"parent_id"=>"","status"=>"unconfirmed","publication_status"=>"unpublished","title"=>"OGNR takes over AMCHAM","body"=>"OGNR storms the rerl.","has_eyewitness"=>"1","youtube_embed_code"=>"","soundcloud_embed_code"=>""},"commit"=>"Update Post","id"=>"ognr-takes-over-amcham-6a6f01ba-a9f9-44d5-924a-72f666f20ca8"}
User Load (1.7ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 ORDER BY "users"."id" ASC LIMIT 1
(1.2ms) SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'admin') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL))) [["user_id",1]]
(6.4ms) SELECT COUNT(*) FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 AND (((roles.name = 'editor') AND (roles.resource_type IS NULL) AND (roles.resource_id IS NULL))) [["user_id",1]]
(0.2ms) BEGIN
Post Exists (1.0ms) SELECT 1 AS one FROM "posts" INNER JOIN "friendly_id_slugs" ON "friendly_id_slugs"."sluggable_id" = "posts"."id" AND "friendly_id_slugs"."sluggable_type" = 'Post' WHERE ("posts"."id" IS NOT NULL) AND "posts"."slug" = 'ognr-takes-over-amcham' LIMIT 1
sql (0.6ms) INSERT INTO "posts" ("body","created_at","has_eyewitness","slug","soundcloud_embed_code","title","updated_at","youtube_embed_code") VALUES ($1,$2,$3,$4,$5,$6,$7,$8) RETURNING "id" [["body","OGNR storms the rerl."],["created_at","2014-12-28 18:51:39.183091"],["has_eyewitness","t"],["slug","ognr-takes-over-amcham-cd491a8e-9a4e-4d5e-b13a-898de4adf135"],["soundcloud_embed_code",""],["title","OGNR takes over AMCHAM"],["updated_at",["youtube_embed_code",""]]
FriendlyId::Slug Load (0.5ms) SELECT "friendly_id_slugs".* FROM "friendly_id_slugs" WHERE "friendly_id_slugs"."sluggable_id" = $1 AND "friendly_id_slugs"."sluggable_type" = $2 ORDER BY "friendly_id_slugs".id DESC LIMIT 1 [["sluggable_id",43],["sluggable_type","Post"]]
sql (0.4ms) DELETE FROM "friendly_id_slugs" WHERE "friendly_id_slugs"."sluggable_id" = $1 AND "friendly_id_slugs"."sluggable_type" = $2 AND "friendly_id_slugs"."slug" = 'ognr-takes-over-amcham-cd491a8e-9a4e-4d5e-b13a-898de4adf135' [["sluggable_id","Post"]]
sql (0.4ms) INSERT INTO "friendly_id_slugs" ("created_at","sluggable_id","sluggable_type") VALUES ($1,$4) RETURNING "id" [["created_at","2014-12-28 18:51:39.242475"],["sluggable_id","Post"]]
(2.6ms) COMMIT
Redirected to http://localhost:3000/posts/ognr-takes-over-amcham-cd491a8e-9a4e-4d5e-b13a-898de4adf135
Completed 302 Found in 372ms (ActiveRecord: 17.3ms)
编辑3
PostController#Update看起来像这样：
class PostsController < ApplicationController
load_and_authorize_resource
def update
respond_to do |format|
if @post.update(post_params)
format.html { redirect_to @post,notice: 'Report was successfully updated.' }
format.json { render :show,status: :ok,location: @post }
else
format.html { render :edit }
format.json { render json: @post.errors,status: :unprocessable_entity }
end
end
end
编辑4
解决方法
您需要使用上传图像的输入字段来显示图像名称,并使用javascript函数在输入字段中显示文件名,如下所示：
<%= text_field_tag 'file_name',"#{@post.photo_file_name}",{disabled: true,class: 'browse-input form-control'} %>
<%= f.input_field :photo %>
:javascript
$("#post_photo").change(function () {
$("#file_name").val(this.value.replace(/^.*[\\\/]/,''));
});
用于防止重新上传未更改的照片
def update
if @post.photo && !@post.photo.changed?
@post.update(post_update_params_without_photo)
end
end
# Example method,don't forgot set the necessary attributes
def post_update_params_without_photo
params.require(:post).permit(:title)
end