我在尝试创建搜索功能时收到此错误。这是我的代码。
class CatalogController < ApplicationController
before_filter :initialize_cart, :except => :show
#before_filter :require_no_user
def show
@disc = Disc.find(params[:id])
@page_title = @disc.title
end
def index
@discs = Disc.order("discs.id desc").includes(:artists, :producer).paginate(:page => params[:page], :per_page => 5)
@page_title = 'Catálogo'
end
def latest
@discs = Disc.latest 5 # invoques "latest" method to get the five latest discs
@page_title = 'Últimos discos'
end
def search
@page_title = "Buscar"
if params[:title]
@discs = Disc.find_with_ferret(params[:title])
#@discs = Disc.where("title like ?", "%#{params[:title]}")
unless @discs.size > 0
flash.now[:notice] = "No se han encontrado discos con la búsqueda establecida."
end
end
end
def rss
latest
render :layout => false
response.headers["Content-Type"] = "application/xml; version=1.0; charset=utf-8"
end
end
这是光盘.rb
class Disc < ActiveRecord::Base
has_and_belongs_to_many :artists
belongs_to :producer
acts_as_ferret :fields => [:title, :artist_names]
has_many :cart_items
has_many :carts, :through => :cart_items
has_attached_file :cover_image
validates_attachment :cover_image,
:content_type => { :content_type => ["image/jpeg", "image/gif", "image/png"] }
validates_length_of :title, :in => 1..255, :message => 'El título no puede estar en blanco'
validates_presence_of :producer, :message => 'Se necesita al menos una productora'
validates_presence_of :artists, :message => 'Se necesita al menos un autor'
validates_presence_of :produced_at, :message => 'Se necesita una fecha de producción'
validates_numericality_of :price, :message => 'Se necesita un precio en formato numérico'
validates_length_of :serial_number, :in => 1..5 , :message => 'El número de serie tiene que estar comprendido entre 1 y 5 caracteres'
validates_uniqueness_of :serial_number, :message => 'Este número de serie ya existe'
def artist_names
self.artists.map{|artist| artist.name}.join(", ")
end
def self.latest(num)
all.order("discs.id desc").includes(:artists, :producer).limit(num)
end
end
有人知道错误吗？我认为问题不在于定义范围，而在于没有想法。我搜索了大约两个小时，但没有得到任何信息。如果有人帮助我，我会感到非常自豪。谢谢！
在模型文件中定义范围
scope :find_with_ferret, -> (title) {where("title like ?", "%#{title}")}