Question

我正在尝试按标题制作搜索广告。我的advertisements.rb模型如下：

class Advertisement < ApplicationRecord
  has_many   :advertisement_tags, dependent: :destroy
  has_many   :comments
  has_many   :tags, through: :advertisement_tags
  belongs_to :user

  validates :title,
            :description,
            presence: true

  def self.find_by_tags(tags)
    Advertisement.joins(:tags).where('tags.tag_name IN (?)', 
    tags.split(/[\s,']/))
  end

  def self.find_by_titles(title)
    if title
      title_length = title.split.length
      find(:all, conditions: [(['title LIKE ?'] * title_length).join(' AND ')] + title.split.map { |t| "%#{t}%" })
    else
      find(:all)
    end
  end
end

search_queries_controller.rb：

class SearchQueriesController < ApplicationController
  def search_by_tag
    @advertisements = Advertisement.find_by_tags(tags_params)

    render 'advertisements/index'
  end

  def search_by_title
    @advertisements = Advertisement.find_by_titles(title_params)

    render 'advertisements/index'
  end

  private

  def tags_params
    params.fetch(:tags, '')
  end

  def title_params
    params.fetch(:title, '')
  end
end

_search_title_form.html.slim

=form_tag search_by_title_path, method: :get do
  =label_tag 'Type Title to Search:'
  =text_field_tag :title
  =submit_tag 'Search'

routes.rb：

Rails.application.routes.draw do
  root 'home#index'

  resources :advertisements do
    resources :comments, only: %i[new create delete]
  end

  resource :profile, only: %i[show edit update] do
    get :your_advertisemnts, controller: :profiles, action: :index
  end

  devise_for :users, controllers: {
    registrations: 'users/registrations'
  }

  get :search_by_tag, controller: :search_queries, action: :search_by_tag
  get :search_by_title, controller: :search_queries, action: :search_by_title
end

我收到这些错误Couldn't find all Advertisements with 'id': (all, {:conditions=>["title LIKE ?", "%#{SOMETHING}%"]}) (found 0 results, but was looking for 2) 通过标签搜索工作正常，但它更简单，在这里我想通过标题中的任何单词找到广告。例如，标题＆＃39;每个人的好工作＆＃39;可以通过查询＆＃39;工作＆＃39;，好工作＆＃39;，＆＃39;每个人＆＃39;，工作为每个人＆＃39;等

Answer 1

您使用的语法（find(:all, ...）非常陈旧（在Rails 2中使用），并且当前版本的Rails不再支持。请改用where：

def self.find_by_titles(title)
  if title.present?
    words = title.split(' ')
    Advertisement.where(
      Array.new(words.length, 'title LIKE ?').join(' AND '),
      *words.map { |word| "%#{word}%" }
    )
  else
    Advertisement.all
  end
end

无法找到所有带有＆＃39;：（全部，{：conditions =＆gt; [＆＃34; title LIKE？＆＃34;，＆＃34;％＃{SOMETHING}％）的广告＆＃34;]}）（找到0结果，但正在寻找2）

1 个答案: