Ruby on rails 3 使用Carrierwave上载文件时,nil不是符号
我找了很多。 我面临着这个错误 控制器中的Create方法为 def创建 @类别=类别。新参数[:类别]Ruby on rails 3 使用Carrierwave上载文件时,nil不是符号,ruby-on-rails-3,carrierwave,Ruby On Rails 3,Carrierwave,我找了很多。 我面临着这个错误 控制器中的Create方法为 def创建 @类别=类别。新参数[:类别] respond_to do |format| if @category.save format.html { redirect_to @category, notice: 'Category was successfully created.' } format.json { render json: @category, status: :created, locat
respond_to do |format|
if @category.save
format.html { redirect_to @category, notice: 'Category was successfully created.' }
format.json { render json: @category, status: :created, location: @category }
else
format.html { render action: "new" }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
我的表格是
<%= form_for @category, :html => { :multipart => true } do |f| %>
<% if @category.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@category.errors.count, "error") %> prohibited this category from being saved:</h2>
<ul>
<% @category.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :description %><br />
<%= f.text_area :description%>
</div>
<div class="field">
<%= f.file_field :image %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
当我选择要上载的文件并单击“提交”按钮时,请不要继续
我的上传程序是
# encoding: utf-8
require 'carrierwave/processing/rmagick'
class ImageUploader < CarrierWave::Uploader::Base
#Include RMagick or MiniMagick support
include CarrierWave::RMagick
# Choose what kind of storage to use for this uploader:
storage :file
# This is a sensible default for uploaders that are meant to be mounted:
def store_dir
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
def scale(width, height)
# do something
end
# Create different versions of your uploaded files:
version :thumb do
process :resize_to_fill => [80, 80]
end
end
我已经创建了新项目,以相同的方式应用了所有内容及其工作方式,仍然不知道为什么会发生此错误,但现在我没有问题。您的CarrierWave uploader类可能有问题,该类装载了:image属性。这将有助于你粘贴代码的上传者。感谢回应,我已经添加了上传者,请告诉我哪里我错了你的上传者似乎是正确的。实际上,我们甚至在我们的项目中进行了尝试,效果很好。您得到的错误意味着要运行的给定处理器是nil,而不是:resize_to_fill。您确定粘贴的代码是导致问题的相关上传程序的代码吗?