Question

我的Event model form时间和to时间在我的日程安排应用中，我希望在保存之前验证重叠时间。

我的观看图像如下;

Departure date: Dec 31, 2016

Day1
07:00 - 07:20 event1
10:30 - 11:30 event2
15:40 - 16:10 event3
[add event button]

Day2
08:15 - 09:05 event4
12:08 - 13:04 event5
14:00 - 14:25 event6
[add event button]

[save schedule button]

from时间和to时间可以同时更改和添加。

如果我尝试为07:05 - 07:30添加（或更改为）Day1，例如13:50 - 14:30 Day2，我想要做的就是显示错误等等。

虽然我尝试了一些代码overlap，between，cover并提及this post或this post等等，但我还没有能够将它们应用到我的代码中。

schema.rb

  create_table "events", force: :cascade do |t|
    t.time     "from"
    t.time     "to"
    t.integer  "room_id"
    ...

  create_table "rooms", force: :cascade do |t|
    t.integer  "schedule_id"
    ...

  create_table "schedules", force: :cascade do |t|
    t.integer  "user_id"
    t.date     "departure_date"
    ...

提供以下模型：

class Schedule < ActiveRecord::Base
  belongs_to :user
  has_many :rooms, inverse_of: :schedule
  accepts_nested_attributes_for :rooms, allow_destroy: true
  ...

class Room < ActiveRecord::Base
  belongs_to :schedule, inverse_of: :rooms
  has_many :events, inverse_of: :room
  accepts_nested_attributes_for :events, allow_destroy: true
  ...

class Event < ActiveRecord::Base
  belongs_to :room, inverse_of: :events
  has_one :schedule, autosave: false, through: :room
  ...

_schedule_form.html.erb

  <%= render 'shared/error_messages', object: f.object %>
  <%= f.label :title %>
  <%= f.text_field :title, class: 'form-control' %>
  <br>
    <%= f.label :departure_date %>
    <div class="input-group date" id="datetimepicker">
      <%= f.text_field :departure_date, :value => (f.object.departure_date.strftime('%b/%d/%Y') if f.object.departure_date), class: 'form-control' %>
      <span class="input-group-addon">
        <span class="glyphicon glyphicon-calendar"></span>
      </span>
    </div>
  <script type="text/javascript">
    $(function () {
      $('#datetimepicker').datetimepicker({format:'MMM-DD-YYYY'});
    });
  </script>
  <br>
  <div id="room">
    <%= f.simple_fields_for :rooms do |a| %>
      <div id="room_<%= a.object.object_id %>">
        <p class="day-number-element-selector"><b>Day&nbsp;<%= a.index.to_i + 1 %></b></p>

        <%= a.simple_fields_for :events do |e| %>
          <span class="form-inline">
            <p>
              <%= e.input :from, label: false %>&nbsp;&nbsp;&nbsp;-&nbsp;&nbsp;&nbsp;
              <%= e.input :to, label: false %>
            </p>
          </span>
          <%= e.input :title, label: false %>
        <% end %>
      </div>

      <%= a.link_to_add "Add event", :events, data: {target: "#room_#{a.object.object_id}"}, class: "btn btn-primary" %>

      <%= a.input :room %>

    <% end %>
  </div>

如果您能告诉我如何检查并显示错误，将不胜感激。

修改<！/强>

仍然无效

event.rb

class Event < ActiveRecord::Base before_save :assign_date belongs_to :room, inverse_of: :events has_one :schedule, autosave: false, through: :room validate :cannot_overlap_another_event scope :in_range, -> range { where('(\'from\' BETWEEN ? AND ?)', range.first, range.last) } scope :exclude_self, -> id { where.not(id: id) } def cannot_overlap_another_event range = Range.new from, to overlaps = Event.exclude_self(id).in_range(range) overlap_error unless overlaps.empty? end def overlap_error errors.add(:overlap_error, 'There is already an event scheduled in this hour!') end

development.log

.... Started POST "/schedules" for 218.33.213.91 at 2016-04-07 11:44:59 +0000 Processing by SchedulesController#create as HTML ... [1m[35m (0.5ms)[0m begin transaction [1m[36m (0.5ms)[0m [1mSELECT COUNT(*) FROM "events" WHERE ("events"."id" IS NOT NULL) AND (('from' BETWEEN '2016-04-07 07:00:00.000000' AND '2016-04-07 07:20:00.000000'))[0m [1m[35m (0.3ms)[0m SELECT COUNT(*) FROM "events" WHERE ("events"."id" IS NOT NULL) AND (('from' BETWEEN '2016-04-07 07:05:00.000000' AND '2016-04-07 07:30:00.000000')) [1m[36mSQL (0.5ms)[0m [1mINSERT INTO "schedules" ("title", "departure_date", "user_id", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?)[0m [["title", "test title"], ["departure_date", "2016-04-10"], ["user_id", 1], ["created_at", "2016-04-07 11:45:00.061460"], ["updated_at", "2016-04-07 11:45:00.061460"]] ...

Answer 1

好吧，如果您需要服务器端验证，可以在模型类中实现一些custom验证器：

validate :cannot_overlap_another_event

接下来，您需要自己编写此方法的代码：

def cannot_overlap_another_event
  range = Range.new from, to
  overlaps = Appointment.exclude_self(id).in_range(range)
  overlap_error unless overlaps.empty?
end

解释此代码的作用，您可以使用Range和from日期创建to对象。然后，它使用辅助作用域来排除Event本身并检查是否存在此范围内的事件。

scope :in_range, -> range {
  where('(from BETWEEN ? AND ?)', range.first, range.last)
}
scope :exclude_self, -> id { where.not(id: id) }

overlap_error是一种填充模型错误哈希以在屏幕上显示的方法：

def overlap_error
  errors.add(:overlap_error, 'There is already an event scheduled in this hour!')
end

Answer 2

在EventsController#Create＆amp; EventsController#Update方法检查旧时间之间的新时间，如：

events = Event.where(:departure_date => event_params[:departure_date])
events.each do |event|
 if event_params[:to].between?(event.to, event.from) || event_params[:from].between?(event.to, event.from)
  flash[:error] = "Current Slot Time is already taken!"
  redirect_to :back
  return
 end
end

Answer 3

看看这个https://makandracards.com/makandra/984-test-if-two-date-ranges-overlap-in-ruby-or-rails。关键是要为重叠的兄弟姐妹定义一个范围。像这样的事情：

# Return a scope for all interval overlapping the given interval, including the given interval itself
  named_scope :overlapping, lambda { |interval| {
    :conditions => ["id <> ? AND (DATEDIFF(start_date, ?) * DATEDIFF(?, end_date)) >= 0", interval.id, interval.end_date, interval.start_date]
  }}

你也可以查看这个宝石：https://github.com/robinbortlik/validates_overlap我认为它可以提供帮助。

Answer 4

我在一个项目中遇到了同样的问题，我的解决方案是在模型中包含一个验证方法，所以我有一个休假期间的模型，我必须添加期间（失误），注意这些失误不重叠；假设您收集了一系列失效 (active_permits) 并且您刚刚从表单中获得了一个新的失效 (lapse)，那么只有两个基本规则可以确定这两个时期是否重叠： lapse[:end] 必须更小 (即比 active_permit[:start] 更早发生）或 lapse[:start] 必须大于（发生晚于）active_permit[:end]，因此除非满足这些规则之一，否则两个时期重叠。代码必须是这样的：

def lapse_validation(lapse)
  error = 0
  @active_permits.each do |active_permit|
    unless (lapse[:end] < active_permit[:start] || lapse[:start] > active_permit[:end])
      error = 1
      errors.add(:new_permit, ": The dates you entered overlapp an existing leave period")
    end
  end
  return error
end

您可以在此处找到有关重叠时期的更详细讨论：https://www.soliantconsulting.com/blog/determining-two-date-ranges-overlap/

如何验证Rails中的重叠时间

4 个答案: