我现在变得非常疯狂。
我有两个模型:项目和截图:
create_table "projects", :force => true do |t|
t.string "name"
t.text "description"
t.boolean "isactive"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
t.string "slug"
t.string "logo"
t.string "teaser"
end
add_index "projects", ["slug"], :name => "index_projects_on_slug"
create_table "screenshots", :force => true do |t|
t.integer "project_id"
t.string "image"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
项目模型看起来像
class Project < ActiveRecord::Base
attr_accessible :name, :description, :isactive, :slug, :logo, :teaser, :screenshots_attributes
scope :isactive, :conditions => ["isactive = ?",true]
mount_uploader :logo, LogoUploader
extend FriendlyId
friendly_id :name, use: [:slugged, :history]
has_many :screenshots
accepts_nested_attributes_for :screenshots
end
和截图模型
class Screenshot < ActiveRecord::Base
belongs_to :project, :polymorphic => true
mount_uploader :screenshots, ScreenshotUploader
end
截图Uploader目前未经编辑:
# encoding: utf-8
class ScreenshotUploader < CarrierWave::Uploader::Base
# Include RMagick or MiniMagick support:
# include CarrierWave::RMagick
# include CarrierWave::MiniMagick
# Choose what kind of storage to use for this uploader:
storage :file
# storage :fog
# Override the directory where uploaded files will be stored.
# 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
# Provide a default URL as a default if there hasn't been a file uploaded:
# def default_url
# "/images/fallback/" + [version_name, "default.png"].compact.join('_')
# end
# Process files as they are uploaded:
# process :scale => [200, 300]
#
# def scale(width, height)
# # do something
# end
# Create different versions of your uploaded files:
# version :thumb do
# process :resize_to_fit => [300, 150]
# end
# Add a white list of extensions which are allowed to be uploaded.
# For images you might use something like this:
# def extension_white_list
# %w(jpg jpeg gif png)
# end
# Override the filename of the uploaded files:
# Avoid using model.id or version_name here, see uploader/store.rb for details.
# def filename
# "something.jpg" if original_filename
# end
end
现在我正在尝试使用此表单添加来自activeadmin的屏幕截图
form do |f|
f.inputs "Project Details" do
f.input :name
f.input :logo, :as => :file, :hint => f.template.image_tag(f.object.logo.url)
f.input :teaser
f.input :description
f.input :isactive
f.has_many :screenshots do |s|
s.input :image, :as => :file
end
end
f.buttons
end
但我得到的只是:
NoMethodError (undefined method `screenshots_changed?' for #<Screenshot:0xc940cd0>):
我在最后几个小时玩弄了这个,但我没有尝试过任何工作:(
有什么建议吗?
答案 0 :(得分:4)
我认为默认的active_admin form do |f|
需要替换为:
form(:html => { :multipart => true }) do |f|
答案 1 :(得分:3)
你需要取消注释这行#include CarrierWave :: RMagick
答案 2 :(得分:0)
我遇到了同样的问题。确保您运行了迁移(rake db:migrate)