所以我正在制作一个博客，并尝试将acts_as_taggable_on每个entry用于:category,:subcategory和:topic. entry模型belongs_to :user和acts_as_ordered_taggable/acts_as_ordered_taggable_on :category, :subcategory,。_
在entries_controller.rb update是：
@entry = Entry.find_by_id(params[:id])
if @entry.update_attributes(params[:entry])
redirect_to entries_path
else
render "edit"
end
当我提交对条目的编辑时，我收到此错误：
> NoMethodError Exception: undefined method `each' for "test_category":String
在这种情况下，这String 'test_category'就是我编辑的值:category。
这有关系acts_as_taggable_on吗？
入口.rb
class Entry < ActiveRecord::Base
belongs_to :user
# Paperclip
has_many :attached_assets, :dependent => :destroy
accepts_nested_attributes_for :attached_assets, :allow_destroy => true
# Acts_As_Taggable
acts_as_ordered_taggable
acts_as_ordered_taggable_on :category, :subcategory, :topic
validates_presence_of :title, :subtitle, :category, :post, :subcategory, :topic
attr_accessible :title, :subtitle, :category_list, :post, :subcategory_list, :topic_list, :asset, :asset_file_name, :asset_type, :entry_id
delegate :title?, :subtitle?, :category?, :post?, :subcategory?, :topic?, :to => :user
before_save :to_l
private
def to_l
self.category.downcase
end
end
entry_controller.rb
class EntriesController < ApplicationController
before_filter :authenticate_action
def index
@entries = Entry.order("created_at desc")
end
def new
@entry = Entry.new
end
def show
@entry = Entry.find_by_id(params[:id])
end
def create
@entry = Entry.new(params[:entry])
if @entry.save
redirect_to entries_path
else
render "new"
end
end
def edit
@entry = Entry.find_by_id(params[:id])
end
def update
@entry = Entry.find_by_id(params[:id])
debugger
if @entry.update_attributes(params[:entry])
redirect_to entries_path
else
puts @entry.errors.messages.inspect
render "edit"
end
end
def destroy
@entry = Entry.find_by_id(params[:id])
@entry.destroy
redirect_to entries_path, :notice => "#{@entry.title} has been deleted"
end
end
WEBrick 输出
> /Users/kyle/Projects/blog/app/controllers/entries_controller.rb:33
> if @entry.update_attributes(params[:entry])
> (rdb:135)
> {:category=>["can't be blank"], :subcategory=>["can't be blank"], :topic=>["can't be blank"]}
> Started PUT "/entries/4" for 127.0.0.1 at 2012-07-19 11:29:43 -0500
> Processing by EntriesController#update as HTML
> Parameters: {"utf8"=>"✓", "authenticity_token"=>"47zbADuuFS3xC5RFc6nLR7qUnE2bn1MZoNm0IwESCcI=", "entry"=>{"title"=>"Test 4", "subtitle"=>"Just Kidding!", "category_list"=>"test_category new", "subcategory_list"=>"test_subcategory new", "topic_list"=>"test_topic new", "post"=>"I pulled a George Lucas, sploops! \r\n\r\njfk;dajgk;dasjkgl;dasczcvzcVzcxv"}, "commit"=>"Update Entry", "id"=>"4"}
> User Load (0.6ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1 [["id", 2]]
> Entry Load (1.1ms) SELECT "entries".* FROM "entries" WHERE "entries"."id" = 4 LIMIT 1
> (0.2ms) BEGIN
> ActsAsTaggableOn::Tag Load (0.7ms) SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = 4 AND "taggings"."taggable_type" = 'Entry' AND (taggings.context = 'category' AND taggings.tagger_id IS NULL) ORDER BY taggings.id
> ActsAsTaggableOn::Tag Load (0.9ms) SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = 4 AND "taggings"."taggable_type" = 'Entry' AND (taggings.context = 'subcategory' AND taggings.tagger_id IS NULL) ORDER BY taggings.id
> ActsAsTaggableOn::Tag Load (1.1ms) SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = 4 AND "taggings"."taggable_type" = 'Entry' AND (taggings.context = 'topic' AND taggings.tagger_id IS NULL) ORDER BY taggings.id
> ActsAsTaggableOn::Tag Load (0.7ms) SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = 4 AND "taggings"."taggable_type" = 'Entry' AND (taggings.context = 'category') ORDER BY taggings.id
> ActsAsTaggableOn::Tag Load (0.8ms) SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = 4 AND "taggings"."taggable_type" = 'Entry' AND (taggings.context = 'subcategory') ORDER BY taggings.id
> ActsAsTaggableOn::Tag Load (0.7ms) SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = 4 AND "taggings"."taggable_type" = 'Entry' AND (taggings.context = 'topic') ORDER BY taggings.id
> (0.2ms) ROLLBACK
> Rendered entries/_form.html.haml (49.3ms)
> Rendered entries/edit.html.haml within layouts/application (53.0ms)
> Completed 200 OK in 9380ms (Views: 91.8ms | ActiveRecord: 6.9ms)