Rails 4：回形针错误Post模型缺少attr_accessor for'image_file_name' [英] Rails 4: Paperclip Error Post model missing required attr_accessor for 'image_file_name'
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问题描述
- 模型缺少attr_accessor for'image_file_name' - Ruby on Rails 4
- 回形针错误：model'missing'需要attr_accessor for'avatar_file_name'
然而，我我不确定问题是否相同。
让我解释一下。
在我的Rails 4应用程序中，我有以下几种型号：
class User< ActiveRecord :: Base
has_many：管理
has_many：日历，通过::管理
结束
class日历< ActiveRecord :: Base
has_many：administrations
has_many：users，through：：administrations
has_many：：posts
end
class Administration< ActiveRecord :: Base
belongs_to：用户
belongs_to：日历
结束
类Post< ActiveRecord :: Base
belongs_to：日历
结束
Post model具有以下属性：
参考：calendar，index：true，foreign_key： true
日期：日期
时间：时间
字符串：主题
字符串：格式
文本：复制
附件：图片
和附件设置如下Post Post模式中的Paperclip： p>
has_attached_file：图片，样式：{small：64x64，med：100x100，large：200x200}
validates_attachment：image，：content_type => {：content_type => image / png}，
：size => {：in => 0..3000.kilobytes}
以下是我使用的迁移：
class AddPaperclipToPost< ActiveRecord :: Migration
def change
remove_column：posts，：media
add_attachment：posts，：image
end
end
code> 注意： remove_column：posts，：media 在这里是因为我在安装Paperclip之前曾经有一个名为media的简单属性。这不是一个函数式的文件字段，而是一个假的占位符，我用来模型化我的表并让它出现在我的UI中。
更新：我检查了我的schema.rb文件，并且迁移经历了，因为我得到以下Post表：
create_tableposts，force：：cascade do | t |
t.integercalendar_id
t.datedate
t.timetime
t.stringsubject
t.stringformat
t.textcopy
t.datetimecreated_at，null：false
t.datetimeupdated_at，null：false
t.stringimage_file_name
t.stringimage_content_type
t.integerimage_file_size
t.datetimeimage_updated_at
end
-----
这是我不明白的：
- 当我在本地运行应用程序时：一切正常，我可以创建新帖子，上传文件，保存帖子，然后在后显示视图中看到它。 / p>
- 当我部署到Heroku时：我可以创建一个新帖子并上传一个文件，但是当我尝试保存它时，错误消息很抱歉，但出错了。如果您是应用程序所有者，请查看日志以获取更多信息。
因此，我得到并检查日志，并获取以下信息：
2015-10-06T15：16：00.867374 + 00：00 app [web.1]：开始GET/日历 for 24.205.62.204 at 2015-10-06 15:16:00 +0000
2015-10-06T15：16：00.874619 + 00：00 app [web.1]：用户负载（1.4ms）SELECTusers 。* FROMusersWHEREusers。id= $ 1 ORDER BYusers。idASC LIMIT 1 [[id，1]]
2015-10-06T15：16： 00.886324 + 00：00 app [web.1]：管理负载（1.2ms）SELECTadministrations。* FROMadministrationsWHEREadministrations。calendar_id= $ 1 ANDadministrations。user_id= $ 2 ORDER BY 管理。idASC LIMIT 1 [[calendar_id，1]，[user_id，1]]
2015-10-06T15：16：00.889529 + 00：00 app [web.1] ：在布局/日历中呈现日历/ index.html.erb（11.8ms）
2015-10-06T15：16：00.871085 + 00：00应用[web.1]：通过CalendarsController处理＃index为HTML
2015-10-06T 15：16：00.880653 + 00：00 app [web.1]：日历加载（1.4ms）选择日历*从日历内部加入管理开启日历。id=管理。 calendar_idWHEREadministrations。user_id= $ 1 [[user_id，1]]
2015-10-06T15：16：00.888807 + 00：00 app [web.1]：Administration Load（1.3 ms）SELECTadministrations。* FROMadministrationsWHEREadministrations。user_id= $ 1 ANDadministrations。calendar_id= $ 2 LIMIT 1 [[user_id，1]，[calendar_id，1] ]
2015-10-06T15：16：00.890698 + 00：00 app [web.1]：在20ms内完成200 OK（查看：10.1ms | ActiveRecord：5.2ms）
2015-10-06T15：16：00.894553 + 00：00 heroku [router]：at = info method = GET path =/ calendarshost = calendy.herokuapp.com request_id = 84199c51- e02b-43a1-8bf8-ac14b102146d fwd =24.205.62.204dyno = web.1 connect = 0ms service = 26ms status = 200 bytes = 2728
2015-10-06T15：16：02.887552 + 00：00 heroku [路由器]：at = info method = GET path =/ calendars / 1host = calendy.herokuapp.com request_id = 3ebd4dd2-ecad-4bef-8bdc-ac3f61a807ac fwd =24.205.62.204dyno = web.1 connect = 1ms服务= 66ms状态= 200字节= 8538
2015-10-06T15：16：02.826123 + 00：00应用[web.1]：2015年10月24日24.205.62.204开始GET/ calendars / 1 06 15:16:02 +0000
2015-10-06T15：16：02.858126 + 00：00 app [web.1]：Post Exists（3.9ms）SELECT 1 AS one FROMpostsWHEREposts 。calendar_id= $ 1 LIMIT 1 [[calendar_id，1]]
2015-10-06T15：16：02.834055 + 00：00 app [web.1]：用户负载（1.7ms）SELECTusers 。* FROMusersWHEREusers。id= $ 1 ORDER BYusers。idASC LIMIT 1 [[id，1]]
2015-10-06T15：16： 02。 883375 + 00：00 app [web.1]：在54ms内完成200 OK（查看：37.0ms | ActiveRecord：8.3ms）
2015-10-06T15：16：02.828856 + 00：00 app [web.1]：通过CalendarsController处理＃显示为HTML
2015-10-06T15：16：02.828863+ 00:00 app [web.1]：参数：{id=>1}
2015-10-06T15：16：02.839230 + 00：00 app [web.1]：Calendar Load *FROM日历INNER JOIN管理ON日历。id=管理。calendar_idWHERE管理。user_id= $ 1和日历。 ID= $ 2 LIMIT 1 [[user_id，1]，[id，1]]
2015-10-06T15：16：02.831152 + 00：00 app [web.1]：Calendar Load 1.3ms）SELECTcalendars。* FROMcalendarsWHEREcalendars。id= $ 1 LIMIT 1 [[id，1]]
2015-10-06T15：16：02.877428 + 00： 00 app [web.1]：在布局/日历中渲染日历/ show.html.erb（34.0ms）
2015-10-06T15：16：44.490246 + 00：00 app [web.1]：开始POST / calendars / 1 / postsfor 24.205.62.204 at 2015-10-06 15:16:44 +0000
2015-10-06T15：16：44.498537 + 00：00 app [web.1] :(开始
2015-10-06T15：16：4 4.501575 + 00：00 app [web.1]：在8ms内完成500次内部服务器错误（ActiveRecord：3.8ms）
2015-10-06T15：16：44.493243 + 00：00 app [web.1]：Parameters ：{utf8=>✓，authenticity_token=>j7RmblwHH2Aj0JCUrYKhAvVvdIDiSOY7DO07NbJNQM / OEsDzA70 + jTABthyPO7 / oZhCgb8 + E / 0DRhPdxO5WXIQ ==，post=> {date（1i）=> 2015，日期（2i）=>10，日期（3i）=>6，时间（1i）=2015，时间（2i） （3i）=6，时间（4i）=>15，时间（5i）=>16，主题=> ;Launch，format=>Image，copy=>嘿，Calendy正在启动，看看这里！，image=>＃< ActionDispatch :: Http :: UploadedFile：0x007fc6b1a6aa20 @tempfile =＃< Tempfile：/tmp/RackMultipart20151006-6-ljl7ny.png> ;, @ original_filename =calendy-social-media-calendar-tool-collaboration.png，@ content_type =image / png ，@ headers =Content-Disposition：form-data;名称= \ 讯息[图像] \; filename = \calendy-social-media-calendar-tool-collaboration.png\\r\\\
Content-Type：image / png\r\\\
>}，commit=> Create Post，calendar_id=>1}
2015-10-06T15：16：44.502893 + 00：00 app [web.1]：
2015-10-06T15：16 ：44.501140 + 00：00 app [web.1]：（1.1ms）ROLLBACK
2015-10-06T15：16：44.495949 + 00：00 app [web.1]：日历加载（1.4ms）SELECT日历。* FROM日历WHERE日历。id= $ 1 LIMIT 1 [[id，1]]
2015-10-06T15：16：44.493113 + 00：00 app [web。 1]：通过PostsController处理＃以HTML格式创建
2015-10-06T15：16：44.502896 + 00：00应用[web.1]：Paperclip :: Error（post_model缺少attr_accessor for'image_file_name'）：
2015-10-06T15：16：44.502898 + 00：00 app [web.1]：app / controllers / posts_controller.rb：30：在`create'
2015-10-06T15：16： 44.502900 + 00：00 app [web.1]：
2015-10-06T15：16：44.502901 + 00：00 app [web.1]：
2015-10-06T15：16：44.784398+ 00:00 heroku [router]：at = info method = GET path =/ favicon.ic ohost = calendy.herokuapp.com request_id = 46565200-4c91-4251-9bc3-bf8167c515c8 fwd =24.205.62.204dyno = web.1 connect = 1ms service = 8ms status = 304 bytes = 93
2015- 10-06T15：16：44.505034 + 00：00 heroku [router]：at = info method = POST path =/ calendars / 1 / postshost = calendy.herokuapp.com request_id = 214a9ce9-deca-4ef1-954a-08b741c712fe fwd =24.205.62.204dyno = web.1 connect = 1ms service = 129ms status = 500 bytes = 1714
更新Heroku CLI ...完成。更新至3.42.15
行 Paperclip :: Error因为我的似乎是问题，我不明白， ： posts_controller 中有以下行：
def post_params
params.require（：post）.permit（：date，：time，：subject， ：format，：copy，：image）
end
按照回形针文档。
我也应该授权所有人Paperclip属性，即：
image_file_name image_file_size image_content_type image_updated_at 或者是迁移问题，在我参考中提到的另外两个Stack Overflo问题中在这个问题的开始？
解决方案
请尝试以下操作：
<$ p： def post_params
params.require（：post）.permit（：date，：time，：subject，：format，：copy，image：[：image_file_name，：image_file_size， ：image_content_type，：image_updated_at]）
结束
First, let me specify that I did find two questions on Stack Overflow that are very similar to my problem:
- Model missing required attr_accessor for 'image_file_name' - Ruby on Rails 4
- Paperclip Error: model missing required attr_accessor for 'avatar_file_name'
However, I am not sure the issue is the same.
Let me explain.
In my Rails 4 app, I have the following models:
class User < ActiveRecord::Base
has_many :administrations
has_many :calendars, through: :administrations
end
class Calendar < ActiveRecord::Base
has_many :administrations
has_many :users, through: :administrations
has_many: :posts
end
class Administration < ActiveRecord::Base
belongs_to :user
belongs_to :calendar
end
class Post < ActiveRecord::Base
belongs_to :calendar
end
The Post model has the following attributes:
references :calendar, index: true, foreign_key: true
date :date
time :time
string :subject
string :format
text :copy
attachment :image
and the attachment was setup as follows with Paperclip in Post model:
has_attached_file :image, styles: { small: "64x64", med: "100x100", large: "200x200" }
validates_attachment :image, :content_type => { :content_type => "image/png" },
:size => { :in => 0..3000.kilobytes }
Here is the migration I used:
class AddPaperclipToPost < ActiveRecord::Migration
def change
remove_column :posts, :media
add_attachment :posts, :image
end
end
Note: remove_column :posts, :media is here because I used to have a simple attribute named "media" before I installed Paperclip. This was a not a functionning file field, but a fake placeholder I used to modelize my table and have it appear in my UI.
—————
UPDATE: I checked my schema.rb file and the migration did go through, since I get the following Post table:
create_table "posts", force: :cascade do |t|
t.integer "calendar_id"
t.date "date"
t.time "time"
t.string "subject"
t.string "format"
t.text "copy"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "image_file_name"
t.string "image_content_type"
t.integer "image_file_size"
t.datetime "image_updated_at"
end
—————
Here is what I don't understand:
— When I run the app locally: everything works fine, I can create a new post, upload a file, save the post and then see it in the post show view.
— When I deploy to Heroku: I can create a new post and upload a file, but when I try to save it, I get the error message We're sorry, but something went wrong. If you are the application owner check the logs for more information.
So, I got and check the logs, and get the following info:
2015-10-06T15:16:00.867374+00:00 app[web.1]: Started GET "/calendars" for 24.205.62.204 at 2015-10-06 15:16:00 +0000
2015-10-06T15:16:00.874619+00:00 app[web.1]: User Load (1.4ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT 1 [["id", 1]]
2015-10-06T15:16:00.886324+00:00 app[web.1]: Administration Load (1.2ms) SELECT "administrations".* FROM "administrations" WHERE "administrations"."calendar_id" = $1 AND "administrations"."user_id" = $2 ORDER BY "administrations"."id" ASC LIMIT 1 [["calendar_id", 1], ["user_id", 1]]
2015-10-06T15:16:00.889529+00:00 app[web.1]: Rendered calendars/index.html.erb within layouts/calendars (11.8ms)
2015-10-06T15:16:00.871085+00:00 app[web.1]: Processing by CalendarsController#index as HTML
2015-10-06T15:16:00.880653+00:00 app[web.1]: Calendar Load (1.4ms) SELECT "calendars".* FROM "calendars" INNER JOIN "administrations" ON "calendars"."id" = "administrations"."calendar_id" WHERE "administrations"."user_id" = $1 [["user_id", 1]]
2015-10-06T15:16:00.888807+00:00 app[web.1]: Administration Load (1.3ms) SELECT "administrations".* FROM "administrations" WHERE "administrations"."user_id" = $1 AND "administrations"."calendar_id" = $2 LIMIT 1 [["user_id", 1], ["calendar_id", 1]]
2015-10-06T15:16:00.890698+00:00 app[web.1]: Completed 200 OK in 20ms (Views: 10.1ms | ActiveRecord: 5.2ms)
2015-10-06T15:16:00.894553+00:00 heroku[router]: at=info method=GET path="/calendars" host=calendy.herokuapp.com request_id=84199c51-e02b-43a1-8bf8-ac14b102146d fwd="24.205.62.204" dyno=web.1 connect=0ms service=26ms status=200 bytes=2728
2015-10-06T15:16:02.887552+00:00 heroku[router]: at=info method=GET path="/calendars/1" host=calendy.herokuapp.com request_id=3ebd4dd2-ecad-4bef-8bdc-ac3f61a807ac fwd="24.205.62.204" dyno=web.1 connect=1ms service=66ms status=200 bytes=8538
2015-10-06T15:16:02.826123+00:00 app[web.1]: Started GET "/calendars/1" for 24.205.62.204 at 2015-10-06 15:16:02 +0000
2015-10-06T15:16:02.858126+00:00 app[web.1]: Post Exists (3.9ms) SELECT 1 AS one FROM "posts" WHERE "posts"."calendar_id" = $1 LIMIT 1 [["calendar_id", 1]]
2015-10-06T15:16:02.834055+00:00 app[web.1]: User Load (1.7ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT 1 [["id", 1]]
2015-10-06T15:16:02.883375+00:00 app[web.1]: Completed 200 OK in 54ms (Views: 37.0ms | ActiveRecord: 8.3ms)
2015-10-06T15:16:02.828856+00:00 app[web.1]: Processing by CalendarsController#show as HTML
2015-10-06T15:16:02.828863+00:00 app[web.1]: Parameters: {"id"=>"1"}
2015-10-06T15:16:02.839230+00:00 app[web.1]: Calendar Load (1.4ms) SELECT "calendars".* FROM "calendars" INNER JOIN "administrations" ON "calendars"."id" = "administrations"."calendar_id" WHERE "administrations"."user_id" = $1 AND "calendars"."id" = $2 LIMIT 1 [["user_id", 1], ["id", 1]]
2015-10-06T15:16:02.831152+00:00 app[web.1]: Calendar Load (1.3ms) SELECT "calendars".* FROM "calendars" WHERE "calendars"."id" = $1 LIMIT 1 [["id", 1]]
2015-10-06T15:16:02.877428+00:00 app[web.1]: Rendered calendars/show.html.erb within layouts/calendars (34.0ms)
2015-10-06T15:16:44.490246+00:00 app[web.1]: Started POST "/calendars/1/posts" for 24.205.62.204 at 2015-10-06 15:16:44 +0000
2015-10-06T15:16:44.498537+00:00 app[web.1]: (1.2ms) BEGIN
2015-10-06T15:16:44.501575+00:00 app[web.1]: Completed 500 Internal Server Error in 8ms (ActiveRecord: 3.8ms)
2015-10-06T15:16:44.493243+00:00 app[web.1]: Parameters: {"utf8"=>"✓", "authenticity_token"=>"j7RmblwHH2Aj0JCUrYKhAvVvdIDiSOY7DO07NbJNQM/OEsDzA70+jTABthyPO7/oZhCgb8+E/0DRhPdxO5WXIQ==", "post"=>{"date(1i)"=>"2015", "date(2i)"=>"10", "date(3i)"=>"6", "time(1i)"=>"2015", "time(2i)"=>"10", "time(3i)"=>"6", "time(4i)"=>"15", "time(5i)"=>"16", "subject"=>"Launch", "format"=>"Image", "copy"=>"Hey, Calendy is launching, take a look here!", "image"=>#<ActionDispatch::Http::UploadedFile:0x007fc6b1a6aa20 @tempfile=#<Tempfile:/tmp/RackMultipart20151006-6-ljl7ny.png>, @original_filename="calendy-social-media-calendar-tool-collaboration.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"post[image]\"; filename=\"calendy-social-media-calendar-tool-collaboration.png\"\r\nContent-Type: image/png\r\n">}, "commit"=>"Create Post", "calendar_id"=>"1"}
2015-10-06T15:16:44.502893+00:00 app[web.1]:
2015-10-06T15:16:44.501140+00:00 app[web.1]: (1.1ms) ROLLBACK
2015-10-06T15:16:44.495949+00:00 app[web.1]: Calendar Load (1.4ms) SELECT "calendars".* FROM "calendars" WHERE "calendars"."id" = $1 LIMIT 1 [["id", 1]]
2015-10-06T15:16:44.493113+00:00 app[web.1]: Processing by PostsController#create as HTML
2015-10-06T15:16:44.502896+00:00 app[web.1]: Paperclip::Error (Post model missing required attr_accessor for 'image_file_name'):
2015-10-06T15:16:44.502898+00:00 app[web.1]: app/controllers/posts_controller.rb:30:in `create'
2015-10-06T15:16:44.502900+00:00 app[web.1]:
2015-10-06T15:16:44.502901+00:00 app[web.1]:
2015-10-06T15:16:44.784398+00:00 heroku[router]: at=info method=GET path="/favicon.ico" host=calendy.herokuapp.com request_id=46565200-4c91-4251-9bc3-bf8167c515c8 fwd="24.205.62.204" dyno=web.1 connect=1ms service=8ms status=304 bytes=93
2015-10-06T15:16:44.505034+00:00 heroku[router]: at=info method=POST path="/calendars/1/posts" host=calendy.herokuapp.com request_id=214a9ce9-deca-4ef1-954a-08b741c712fe fwd="24.205.62.204" dyno=web.1 connect=1ms service=129ms status=500 bytes=1714
updating Heroku CLI...done. Updated to 3.42.15
The line Paperclip::Error (Post model missing required attr_accessor for 'image_file_name'): seems to be the problem, which I don't understand, since I have the following line in my posts_controller:
def post_params
params.require(:post).permit(:date, :time, :subject, :format, :copy, :image)
end
as recommended in the Paperclip documentation.
Should I also authorize all Paperclip attributes, ie:
image_file_nameimage_file_sizeimage_content_typeimage_updated_at
Or is it a problem of migrations, as it seems to be in the other two Stack Overflo questions I mentioned in reference at the beginning of this question?
解决方案
Try the following:
def post_params
params.require(:post).permit(:date, :time, :subject, :format, :copy, image: [:image_file_name, :image_file_size, :image_content_type, :image_updated_at])
end
这篇关于Rails 4：回形针错误Post模型缺少attr_accessor for'image_file_name'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！
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