[英]rails4 + mongoid + carrierwave + fog + jquery-file-upload - TypeError (no implicit conversion of nil into String)
I cannot figure out what I am doing wrong here with a multiple file upload. 我无法弄清楚在多文件上传中我在做什么错。 I have another rails4 app with a similar setup, just with postgresql rather than mongoid and i havent run into this issue.
我有另一个具有类似设置的rails4应用程序,只是使用了postgresql而不是mongoid,而我还没有遇到这个问题。 I am not sure if it's something with carrierwave-mongoid or what.
我不确定这是与载波波状杂音有关的还是什么。 How do i further narrow down what is actually causing the TypeError???
我如何进一步缩小真正导致TypeError的原因???
Update Recreated entire app and used Postgresql, and running into the same exact issue.. so its not isolated to carrierwave-mongoid like i thought. 更新重新创建了整个应用程序,并使用了Postgresql,并遇到了完全相同的问题..因此,它没有像我想的那样被隔离到载波-杂种动物中。
Development.log Development.log
Started POST "/images" for 127.0.0.1 at 2014-10-02 11:28:28 -0400
Processing by ImagesController#create as JSON
Parameters: {"utf8"=>"✓", "authenticity_token"=>"MPtXrjrQ+dLb67LVD+aYUrMIYfCUBQWLOaOztlB2sSU=", "image"=>{"gallery_id"=>"3", "file"=>[#<ActionDispatch::Http::UploadedFile:0x007fb55e80c378 @tempfile=#<Tempfile:/var/folders/3m/t1v11gzj32n0fdbhwr823y600000gn/T/RackMultipart20141002-33694-3bmoib>, @original_filename="10495567_1510476362523625_7774203923998269219_o.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"image[file][]\"; filename=\"10495567_1510476362523625_7774203923998269219_o.jpg\"\r\nContent-Type: image/jpeg\r\n">]}}
Completed 500 Internal Server Error in 3ms
TypeError (no implicit conversion of nil into String):
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Model 模型
class Picture
include Mongoid::Document
include Mongoid::Timestamps
belongs_to :gallery
mount_uploader :file, PictureUploader
def to_jq_upload
{
"name" => read_attribute(:file),
"size" => file.size,
"url" => file.url,
"thumb_url" => file.thumb.url,
#"delete_url" => gallery_picture_path(:id => id),
"delete_type" => "DELETE"
}
end
end
Controller 调节器
class PicturesController < ApplicationController
load_and_authorize_resource
before_action :set_picture, only: [:destroy]
def create
p_attr = params[:picture]
p_attr[:file] = params[:picture][:file].first if params[:picture][:file].class == Array
logger.debug "params = #{params}"
logger.debug "p_attr = #{p_attr}"
@picture = Picture.new(p_attr)
if @picture.save
respond_to do |format|
format.js
format.html {
render :json => [@picture.to_jq_upload].to_json,
:content_type => 'text/html',
:layout => false
}
format.json {
render :json => { :files => [@picture.to_jq_upload] }
}
end
else
render :json => [{:error => "custom_failure"}], :status => 304
end
end
private
def picture_params
params.require(:picture).permit(:gallery_id, file:[])
end
Form 形成
<%= form_for Picture.new, :html => { :multipart => true, :id => "fileupload" } do |fm| %>
<%= fm.file_field :file, :id => "add_images_field", :multiple => true %>
<% end %>
Gemfile 的Gemfile
gem 'rails', '4.1.5'
gem 'mongoid', '~> 4.0.0'
gem 'bson_ext'
gem 'carrierwave-mongoid', :require => 'carrierwave/mongoid'
gem 'mini_magick'
gem 'fog'
gem "jquery-fileupload-rails"
Taking a quick look I'd say you've set your picture_params
incorrectly; 快速浏览一下,我会说您设置的
picture_params
错误; at least based on the POST submission string. 至少基于POST提交字符串。 "file" is nested under "image", it isn't in the root level of the hash.
“文件”嵌套在“图像”下,它不在哈希的根目录下。
Rails 4 - Strong Parameters - Nested Objects Rails 4-强参数-嵌套对象
Here's some visual formatting for your POST string: 这是您的POST字符串的一些可视格式:
{
"utf8"=>"✓"
"authenticity_token"=>"MPtXrjrQ+dLb67LVD+aYUrMIYfCUBQWLOaOztlB2sSU="
"image"=>{
"gallery_id"=>"3"
"file"=>[#<ActionDispatch::Http::UploadedFile:0x007fb55e80c378 @tempfile=#<Tempfile:/var/folders/3m/t1v11gzj32n0fdbhwr823y600000gn/T/RackMultipart20141002-33694-3bmoib>
@original_filename="10495567_1510476362523625_7774203923998269219_o.jpg"
@content_type="image/jpeg"
@headers="Content-Disposition: form-data; name=\"image[file][]\"; filename=\"10495567_1510476362523625_7774203923998269219_o.jpg\"\r\nContent-Type: image/jpeg\r\n">]
}
}
So what you'd need would be: 因此,您需要的是:
params.require(:picture).permit(:image => [:gallery_id, file: []])
However since your form submission hash doesn't match the name of your model - for whatever reason, try: 但是,由于您的表单提交哈希与模型名称不匹配-出于任何原因,请尝试:
params.require(:image).permit(:gallery_id, file: [])
EDIT: I'm also curious about why you're nesting the file
and gallery_id
attributes inside image
. 编辑:我也很好奇为什么您要在
image
嵌套file
和gallery_id
属性。 That will change the way rails assigns the parameters to the model and perhaps is why you're getting nil. 这将改变Rails将参数分配给模型的方式,这也许就是为什么您得到零的原因。 I think the real problem is the way you've set up your form.
我认为真正的问题是您建立表格的方式。 Take a look at your routes.rb file;
查看您的routes.rb文件; the URL ends in
/images
, however your model is Picture
. URL以
/images
结尾,但是您的模型是Picture
。 It seems you have a conflict of nomenclature - probably in multiple areas of your code. 看来您在命名方面有冲突-可能在代码的多个区域中。
@JakeTheSnake may be onto something. @JakeTheSnake可能在某些地方。 On a more specific level, I took a quick look myself, based on your backtrace.
在更具体的层面上,我根据您的回溯来快速浏览了一下自己。
See the source code here on GitHub , line 159, which is the line that the first two lines of your backtrace reference: 在GitHub的第159行中查看源代码,这是backtrace的前两行引用的行:
carrierwave (0.10.0) lib/carrierwave/uploader/cache.rb:159:in `join'
carrierwave (0.10.0) lib/carrierwave/uploader/cache.rb:159:in `cache_path'
Grains of salt, here, because I know nothing about Carrierwave and very little information to go off of. 这里是盐粒,因为我对Carrierwave一无所知,而且很少有信息可做。 However, I searched the 0.10.0 carrierwave docs for method "cache_path", and found nothing.
但是,我在0.10.0载波文档中搜索了方法“ cache_path”,却一无所获。 Note, the first line of your backtrace references "join", as in File.join.
注意,回溯的第一行引用File.join中的“ join”。 My guess is that one of the three calls within that File.join,
cache_name
, cache_path
, or the final root
are returning nil. 我的猜测是,该File.join中的三个调用之一,
cache_name
, cache_path
或最后一个root
都返回nil。 File.join is trying to convert this nil
into a String
, which will not happen in Ruby. File.join试图将此
nil
转换为String
,这在Ruby中不会发生。
I know this answer is not as technical as it probably could be, and that it doesn't come close to directly solving the issue. 我知道这个答案并不像它可能的那么技术性,而且还不能直接解决问题。 I only hope that it can at least point you in the right direction or help in some way.
我只希望它至少可以为您指明正确的方向或以某种方式提供帮助。
Please let me know if I can be of any more assistance. 请让我知道是否可以提供更多帮助。 Good luck.
祝好运。
EDIT: It could be anywhere, I've gathered from looking into more of the code referenced in the backtrace, leading me to believe @JakeTheSnake really is onto something there. 编辑:可能在任何地方,我从调查回溯引用的更多代码中汲取了灵感,使我相信@JakeTheSnake确实存在于其中。 I believe that he is probably right when he says it is something high-level (like a misconfigured form or controller, something small), however, deeply analyzing your backtraces and the code behind them is super, super helpful and can yield many pieces of the puzzle.
我认为当他说这是一个高级问题(例如配置错误的表单或控制器,有些小的东西)时,他可能是对的,但是,深入分析您的回溯和背后的代码是非常有用的,并且会产生很多难题。 I'd take a good, hard look at the code referenced in the backtrace, if you have not already.
如果您还没有的话,我将认真回顾一下回溯中引用的代码。 Again, good luck, and let me know if I can help more.
再次祝您好运,请告诉我是否可以提供更多帮助。
This is my solution: 这是我的解决方案:
Model: 模型:
class Picture < ActiveRecord::Base
include Rails.application.routes.url_helpers
mount_uploader :image, SimpleImageUploader
def to_jq_upload
{
"name" => read_attribute(:image),
"size" => image.size,
"url" => image.url,
"thumbnail_url" => image.thumb.url,
"delete_url" => picture_path(:id => id),
"delete_type" => "DELETE"
}
end
end
Action: 行动:
def create
pics = picture_params
@picture = Picture.new(image: pics[:image].first)
if @picture.save
...
end
end
...
private
def picture_params
params.require(:picture).permit(image: [])
end
Shortly view: 简短查看:
<%= form_for Picture.new, :html => {:multipart => true, :id => "fileupload"} do |f| %>
<%= f.file_field :image, multiple: true, accept: 'image/*' %>
..
<% end %>
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