Question

我是非常棒的ROR编码员，但试图找出这个问题没有运气。我有一个访问两个模型的应用程序：

- 约会（属于某个地点） -Locations（有许多约会）

在我的约会索引页面上，我使用gmap4rails gem显示带引脚的位置地图。这一切都很好，但我无法弄清楚如何将@appointments限制在附近的那些位置......

def index
  @appointments = Appointment.where(active: "TRUE").order("created_at DESC")
  @hash = Gmaps4rails.build_markers(@appointments) do |appointment, marker|
    marker.lat appointment.location.latitude
    marker.lng appointment.location.longitude
  end
end

这只能让我获得所有活跃的约会。它在我的Locations索引上工作：

def index
  if params[:search].present?
    @locations = Location.near(params[:search], 50)
  else
    @locations = Location.near([session[:latitude], session[:longitude]], 50)
  end
    @hash = Gmaps4rails.build_markers(@locations) do |location, marker|
      marker.lat location.latitude
      marker.lng location.longitude
  end
end

我已尝试过该查询的每个变体，以包含Appointment.location.near ...

我在这里缺少什么？

以下是模型：

class Appointment < ActiveRecord::Base
    belongs_to :user
    belongs_to :profile
    belongs_to :length
    belongs_to :location

    has_many :confirmations

    validates_presence_of :title, :comments
end

位置...

class Location < ActiveRecord::Base

    geocoded_by :address

    def address
      [address_1, city, state, zip].compact.join(', ')
    end

    after_validation :geocode, :if => :address_1_changed?

    has_many :profile_locations
    has_many :profiles, through: :profile_locations

    has_many :appointments
end

Answer 1

试试这个：

# Appointments controller
def index
  nearby_locations = Location.near([session[:latitude], session[:longitude]], 50)
  @appointments = Appointment.where(location: nearby_locations).where(active: true).order(created_at: :desc)
  ...
end

请注意，您可以传递一个对象/ ID数组（如上面的nearby_locations）来获取对象集合（上面的@appointments）。您还可以链接多个查询。

Answer 2

经过多次不同的错误后，我终于明白了......

def index
    location_ids = Location.near([session[:latitude], session[:longitude]], 50, order: '').pluck(:id)
    @appointments = Appointment.includes(:location).where(location_id: location_ids).where(active: "TRUE").order("created_at DESC")

    @hash = Gmaps4rails.build_markers(@appointments) do |appointment, marker|
      marker.lat appointment.location.latitude
      marker.lng appointment.location.longitude
    end
end

感谢您的指导，但只需要进行一些调整。

试图解决一个＆＃39; .includes＆＃39; rails控制器活动记录中的问题

2 个答案: