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我有一個創建產品頁面，其中嵌套創建照片。照片屬於產品和產品有很多照片。我正在使用the jQuery file upload plugin，但它需要您在上傳後點擊保存。這是一個問題，因爲它是以我的產品形式出現的，我無法在沒有產品的情況下保存照片。所以這是當我保存時發生的事情。 「內部服務器錯誤！」 （以上創建產品）使用jQuery文件上傳插件嵌套form_for
而這正是在控制檯得到的輸出！
控制檯錯誤
Started POST "/products" for 127.0.0.1 at 2013-07-02 15:01:38 -0400
Processing by ProductsController#create as JSON
Parameters: {"utf8"=>"✓", "authenticity_token"=>"z5BnHkHTqPZGKt+uWQs10wUEKkGlphXth0rqM82tjR0=", "product"=>{"name"=>"", "description"=>"", "condition"=>"", "quantity"=>"", "price"=>"", "ship_method"=>"", "ship_price"=>"", "photos_attributes"=>{"0"=>{"image"=>#<ActionDispatch::Http::UploadedFile:0x9699c3c @original_filename="eye.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"product[photos_attributes][0][image]\"; filename=\"eye.jpg\"\r\nContent-Type: image/jpeg\r\n", @tempfile=#<File:/tmp/RackMultipart20130702-5814-cu2g3o>>}}}}
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."auth_token" = 'eQOQkRRSnzfA51iiDQ-90w' LIMIT 1
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/eye20130702-5814-12toyjt.jpg[0]'
Command :: identify -format %m '/tmp/eye20130702-5814-12toyjt.jpg[0]'
Command :: identify -format %m '/tmp/eye20130702-5814-12toyjt.jpg[0]'
Command :: identify -format %m '/tmp/eye20130702-5814-12toyjt.jpg[0]'
Command :: convert '/tmp/eye20130702-5814-12toyjt.jpg[0]' -auto-orient -resize "320x240>" '/tmp/eye20130702-5814-12toyjt20130702-5814-vpw0ed'
Command :: file -b --mime '/tmp/eye20130702-5814-12toyjt20130702-5814-vpw0ed'
Command :: identify -format '%wx%h,%[exif:orientation]' '/tmp/eye20130702-5814-12toyjt.jpg[0]'
Command :: identify -format %m '/tmp/eye20130702-5814-12toyjt.jpg[0]'
Command :: identify -format %m '/tmp/eye20130702-5814-12toyjt.jpg[0]'
Command :: identify -format %m '/tmp/eye20130702-5814-12toyjt.jpg[0]'
Command :: convert '/tmp/eye20130702-5814-12toyjt.jpg[0]' -auto-orient -resize "100x100>" '/tmp/eye20130702-5814-12toyjt20130702-5814-b835qy'
Command :: file -b --mime '/tmp/eye20130702-5814-12toyjt20130702-5814-b835qy'
Rendered products/new.js.erb (5.2ms)
Completed 500 Internal Server Error in 806ms
AbstractController::DoubleRenderError (Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like "redirect_to(...) and return".):
app/controllers/products_controller.rb:34:in `block (2 levels) in create'
app/controllers/products_controller.rb:32:in `create'
Rendered /home/alain/.rvm/gems/ruby-1.9.3-head/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/_trace.erb (39.6ms)
Rendered /home/alain/.rvm/gems/ruby-1.9.3-head/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (2.2ms)
Rendered /home/alain/.rvm/gems/ruby-1.9.3-head/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (52.8ms)
新產品頁面（HAML）
= form_for @product,:url => products_path, :html => { :id => "fileupload", :multipart => true } do |f|
%p
= f.label :name
= f.text_field :name
%p
= f.label :description
= f.text_field :description
%p
= f.label :condition
= f.text_field :condition
%p
= f.select :quantity, [['Quantity', nil], '1', '2', '3', '4', '5', '6', '7', '8', '9', '10']
%p
= f.label :price
= f.text_field :price, class: "auto", data: { a_sign: "$ " }
%p
=f.select :ship_method, [['Shipping', nil], 'usps', 'ups', 'fedex']
%p
= f.label :ship_price
= f.text_field :ship_price, class: "auto", data: { a_sign: "$ " }
%p
= f.fields_for :photos do |fp|
=fp.file_field :image
%br
.files{"data-target" => "#modal-gallery", "data-toggle" => "modal-gallery"}
%p.button
= f.submit
:javascript
var fileUploadErrors = {
maxFileSize: 'File is too big',
minFileSize: 'File is too small',
acceptFileTypes: 'Filetype not allowed',
maxNumberOfFiles: 'Max number of files exceeded',
uploadedBytes: 'Uploaded bytes exceed file size',
emptyResult: 'Empty file upload result'
};
/The template to display files available for upload
%script#template-upload{:type => "text/x-tmpl"}
{% for (var i=0, file; file=o.files[i]; i++) { %}
<tr class="template-upload fade">
<td class="preview"><span class="fade"></span></td>
<td class="name"><span>{%=file.name%}</span></td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
{% if (file.error) { %}
<td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td>
{% } else if (o.files.valid && !i) { %}
<td>
<div class="progress progress-success progress-striped active"><div class="bar" style="width:0%;"></div></div>
</td>
<td class="start">{% if (!o.options.autoUpload) { %}
<button class="btn btn-primary">
<i class="icon-upload icon-white"></i>
<span>{%=locale.fileupload.start%}</span>
</button>
{% } %}</td>
{% } else { %}
<td colspan="2"></td>
{% } %}
<td class="cancel">{% if (!i) { %}
<button class="btn btn-warning">
<i class="icon-ban-circle icon-white"></i>
<span>{%=locale.fileupload.cancel%}</span>
</button>
{% } %}</td>
</tr>
{% } %}
/The template to display files available for download
%script#template-download{:type => "text/x-tmpl"}
{% for (var i=0, file; file=o.files[i]; i++) { %}
<tr class="template-download fade">
{% if (file.error) { %}
<td></td>
<td class="name"><span>{%=file.name%}</span></td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
<td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[ file.error] || file.error%}</td>
{% } else { %}
<td class="preview">{% if (file.thumbnail_url) { %}
<a href="{%=file.url%}" title="{%=file.name%}" rel="gallery" download="{%=file.name%}"><img src="{%=file.thumbnail_url%}"></a>
{% } %}</td>
<td class="name">
<a href="{%=file.url%}" title="{%=file.name%}" rel="{%=file.thumbnail_url&&'gallery'%}" download="{%=file.name%}">{%=file.name%}</a>
</td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
<td colspan="2"></td>
{% } %}
<td class="delete">
<button class="btn btn-danger" data-type="{%=file.delete_type%}" data-url="{%=file.delete_url%}">
<i class="icon-trash icon-white"></i>
<span>{%=locale.fileupload.destroy%}</span>
</button>
<input type="checkbox" name="delete" value="1">
</td>
</tr>
{% } %}
%script{:charset => "utf-8", :type => "text/javascript"}
$(function() {
// Initialize the jQuery File Upload widget:
$('#fileupload').fileupload();
//
// Load existing files:
$.getJSON($('#fileupload').prop('action'), function (files) {
var fu = $('#fileupload').data('blueimpFileupload'),
template;
fu._adjustMaxNumberOfFiles(-files.length);
console.log(files);
template = fu._renderDownload(files)
.appendTo($('#fileupload .files'));
// Force reflow:
fu._reflow = fu._transition && template.length &&
template[0].offsetWidth;
template.addClass('in');
$('#loading').remove();
});
});
產品控制器
def new
@product = Product.new
@photo = Photo.new
@product.photos.build
end
def create
@product = current_user.products.new(params[:product])
@photo = current_user.photos.new(params[:photo])
if @product.valid?
@product.save
@photo.product_id = @product.id
@photo.save
render "show", :notice => "Sale created!"
else
@product.photos.build
render "new", :notice => "Somehting went wrong!"
end
respond_to do |format|
format.html
format.json { render json: @photo }
end
end
我應該怎樣做？
我很喜歡這個例子！ –
以下是圖片上傳的示例： https://gist.github.com/deepakdargade/5928404 – Deepak