Ruby on Rails - 日期过去后如何删除帖子？

Question

我目前有一个使用 Ruby on Rails 构建的职位列表网站，在添加职位页面上，其中一个输入是申请日期/职位到期日期字段 ()。我需要添加代码，该代码将在该日期过去后从视图中删除整个列表。目前到期 dat 的输入字段只是一个文本输入，是否需要更改，如果需要如何更改？我是 Rails 新手，所以请原谅我的知识。

index.html.erb -

<% @jobs.each do |job| %>
        <div class="job">
            <h2><%= link_to job.position, job %></h2>
            <ul class="entry_list">
                <li>Posted on: <%= job.created_at.strftime("#{job.created_at.day.ordinalize} %B %Y") %></li>
                <li>Company: <%= job.company %></li>
                <li>Salary: <%= job.salary %></li>
                <li>Contract Type: <%= job.contract %></li>
                <li>City: <%= job.city %></li>
                <li>Applications in by: <%= job.expirydate %></li>
                <li>Job Type: <%= job.jobtype %></li>
            </ul>
        </div>
    <% end %>

new.html.erb -

<%= simple_form_for @job, html: { multipart: true } do |form| %>
  <h2>Job Position:</h2>
    <%= form.input :position, input_html: { maxlength: 60 }, placeholder: "Job Position", label: false %>
    <%= form.input :company, input_html: { maxlength: 60 }, placeholder: "Company name", label: false %>
    <%= form.input :salary, input_html: { maxlength: 60 }, placeholder: "Salary", label: false %>
    <%= form.input :contract, input_html: { maxlength: 60 }, placeholder: "Contract Type", label: false, collection: ['Full time', 'Part time', 'Internship'], prompt: "Contract Type" %>
    <%= form.input :city, input_html: { maxlength: 60 }, placeholder: "City", label: false %>
    <%= form.input :expirydate, input_html: { maxlength: 60 }, placeholder: "Expiry date", label: false %>
    <%= form.input :jobtype, input_html: { maxlength: 60 }, placeholder: "Job Type", label: false, collection: ['Advertising', 'Art Direction', 'Artworker', 'Copywriting', 'Digital Design', 'Digital Developer', 'Editorial', 'Graphic Design', 'Miscellaneous', 'Motion Design/Animation', 'PR and Marketing', 'Project Management', 'Studio Management'], prompt: "Job Type" %>
    <%= form.input :description, input_html: { maxlength: 60 }, placeholder: "Full job description", label: false %>
    <%= form.input :apply, input_html: { maxlength: 60 }, placeholder: "How to apply", label: false %>
    <h2>Your Contact Details:</h2>
    <%= form.input :contactname, input_html: { maxlength: 60 }, placeholder: "Contact Name", label: false %>
    <%= form.input :contactemail, input_html: { maxlength: 60 }, placeholder: "Contact Email", label: false %>
    <%= form.input :contactphone, input_html: { maxlength: 60 }, placeholder: "Contact Telephone", label: false %>
    <%= form.input :human_sum, label: 'What is 1+1?' %>
    <%= form.button :submit %>
<% end %>

jobs_controller.rb -

class JobsController < ApplicationController

respond_to :html, :js

def index
   @jobs = Job.page(params[:page]).per(20).order(created_at: :desc)
end

def new
   @job = Job.new
end

def show
   @job = Job.find(params[:id])
end

def create
   @job = Job.new(params.require(:job).permit(:human_sum, :position, :company, :salary, :companywebsite, :contract, :city, :expirydate, :jobtype, :description, :apply, :contactname, :contactemail, :contactphone, ))
    if @job.save
      redirect_to root_path
    else
      render "new"
    end
end

end

job.rb -

class Job < ActiveRecord::Base
  validates :position, presence: true
  validates :company, presence: true
  validates :salary, presence: true
  validates :companywebsite, presence: true
  validates :contract, presence: true
  validates :city, presence: true
  validates :expirydate, presence: true
  validates :jobtype, presence: true
  validates :description, presence: true
  validates :apply, presence: true
  validates :contactname, presence: true
  validates :contactemail, presence: true
  validates :contactphone, presence: true

  attr_accessor :human_sum 
  validate :not_a_bot

  private

  def not_a_bot
    if human_sum.to_i != 2 
      errors.add(:human_sum, 'Get out, you bot!') 
    end
  end

  scope :by_contract, -> (contracts) { where(:contract => (contracts|| Job.uniq.pluck(:contract)) ) }
  scope :by_jobtype, -> (jobtypes) { where(:jobtype => (jobtypes|| Job.uniq.pluck(:jobtype)) ) }

end

Answer 1

您可以将控制器中的索引操作更改为以下内容：

Model.find(:all, :conditions => [job.expirydate < Datetime.now])

如果你想删除旧记录，你可以为任务创建一个文件：

# lib/tasks/delete_old_records.rake
namespace :delete do
  desc 'Delete records older than 60 days'
  task :old_records => :environment do
    Model.where('created_at > ?', 60.days.ago).each do |model|
      model.destroy
    end

    # or Model.delete_all('created_at > ?', 60.days.ago) if you don't need callbacks
  end
end

运行：

RAILS_ENV=production rake delete:old_records

安排它使用 cron 运行（在本例中每天早上 8 点）：

0 8 * * * /bin/bash -l -c 'cd /my/project/releases/current && RAILS_ENV=production rake delete:old_records 2>&1'

您还可以使用 [whenever][1] gem 在部署时创建和管理您的 crontab：

every 1.day, :at => '8:00 am' do
  rake "delete:old_records"
end

Answer 2

我会创建一个删除所有旧帖子的 rake 任务，然后定期从 cron 或其他调度程序运行它，例如每天凌晨 2 点。

编辑 - 虽然，再看看你的问题，我不认为你真的想删除它们。我认为您只是不想在索引页面上显示它们。那里“删除”这个词的使用令人困惑:)

Answer 3

要将显示限制为活动记录，请向模型添加范围：

scope :current, -> { expirydate >= Date.current }

并将其添加到您的控制器：

@jobs = Job.current.page(params[:page]).per(20).order(created_at: :desc)

Answer 4

2 件事：
1) 只列出未过期的工作

def index
   @jobs = Job.where('expirydate >= ?', Date.today).page(params[:page]).per(20).order(created_at: :desc)
end

2) 使用交互式日期选择器增强 expirydate 的文本输入。 内置日期选择器的 Rails 不是很好，因为它们不使用 javascript。根据您使用的 javascript 库，有很多解决方案。以 jquery 为例，请参阅http://jqueryui.com/datepicker/