gpt4 book ai didi

ruby-on-rails - 编辑之前已成功上传图像的记录时,如何在编辑时不必重新上传?

转载 作者:行者123 更新时间:2023-12-03 00:19:54 25 4
gpt4 key购买 nike

我正在使用 Carrierwave、Fog 来存储上传到 S3 的图像。

问题是,当我去编辑记录时,"file"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,上传的文件/图像就会消失。我什至不确定它是否从 S3 中删除,但与我在数据库中的记录的关联消失了。

这是我的 Post 模型的 SimpleForm _form.html.erb 部分:

<%= 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enum publication_status: [ :unpublished, :published ]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

我按照 jaspreet 的建议将表单中的 f.input_field :photo 更改为 f.file_field :photo,但它仍然不起作用。这是我的更新请求日志:

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", "2014-12-28 18:51:39.183091"], ["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", 43], ["sluggable_type", "Post"]]
SQL (0.4ms) INSERT INTO "friendly_id_slugs" ("created_at", "slug", "sluggable_id", "sluggable_type") VALUES ($1, $2, $3, $4) RETURNING "id" [["created_at", "2014-12-28 18:51:39.242475"], ["slug", "ognr-takes-over-amcham-cd491a8e-9a4e-4d5e-b13a-898de4adf135"], ["sluggable_id", 43], ["sluggable_type", "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

Routes

最佳答案

您需要使用上传图片的输入字段来显示图片名称,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(/^.*[\\\/]/, ''));
});

您可以使用相同的代码上传文件。

用于防止重新上传未更改的照片

您可以使用changed?检查照片是否更改的方法如下:

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

解释:此代码仅更新更改的属性,即(标题、状态等)。

关于ruby-on-rails - 编辑之前已成功上传图像的记录时,如何在编辑时不必重新上传?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27536505/

25 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com