Rails 4：Geocoder與Devise

Question

當前用戶創建一個帖子想通過IP反向方法知道用戶位置在地理編碼器。爲此，我創建了一個帖子，用戶和位置模型。我已經通過railscasts學習安裝Geocoder並能夠通過地址查找緯度和經度。現在，如何將設計中的用戶標識集成到地理編碼器以確定當前的用戶位置。

class Location < ActiveRecord::Base 
 
\t belongs_to :user 
 
\t geocoded_by :address 
 
\t after_validation :geocode, :if => :address_changed? 
 
end 
 

 

 
class LocationsController < ApplicationController 
 
    before_action :set_location, only: [:show, :edit, :update, :destroy] 
 

 
    respond_to :html 
 

 
    def index 
 
    #location = request.location 
 
    @locations = Location.all 
 
    respond_with(@locations) 
 
    end 
 

 
    def show 
 
    respond_with(@location) 
 
    end 
 

 
    def new 
 
    @location = Location.new 
 
    respond_with(@location) 
 
    end 
 

 
    def edit 
 
    end 
 

 
    def create 
 
    if params[:location].blank? 
 
     @location = request.location 
 
     @locations = Location.near([current_user.latitude, current_user.longitude], 50, :order => :distance) 
 
    end 
 
    respond_with(@location) 
 
    end

更新時間：

ActiveRecord::Schema.define(version: 20150507160846) do 
 

 
    create_table "locations", force: true do |t| 
 
    t.string "address" 
 
    t.float "latitude" 
 
    t.float "longitude" 
 
    t.datetime "created_at" 
 
    t.datetime "updated_at" 
 
    t.string "user_id" 
 
    t.string "integer" 
 
    end 
 

 
    create_table "posts", force: true do |t| 
 
    t.text  "post" 
 
    t.string "location" 
 
    t.string "tag_list" 
 
    t.boolean "active" 
 
    t.datetime "created_at" 
 
    t.datetime "updated_at" 
 
    t.integer "user_id" 
 
    end 
 

 
    create_table "users", force: true do |t| 
 
    t.string "email",     default: "", null: false 
 
    t.string "encrypted_password",  default: "", null: false 
 
    t.string "reset_password_token" 
 
    t.datetime "reset_password_sent_at" 
 
    t.datetime "remember_created_at" 
 
    t.integer "sign_in_count",   default: 0, null: false 
 
    t.datetime "current_sign_in_at" 
 
    t.datetime "last_sign_in_at" 
 
    t.string "current_sign_in_ip" 
 
    t.string "last_sign_in_ip" 
 
    t.datetime "created_at" 
 
    t.datetime "updated_at" 
 
    t.string "name" 
 
    t.string "location" 
 
    end 
 

 
    add_index "users", ["email"], name: "index_users_on_email", unique: true 
 
    add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true 
 

 
end 
 

 

 

 
class User < ActiveRecord::Base 
 
    # Include default devise modules. Others available are: 
 
    # :confirmable, :lockable, :timeoutable and :omniauthable 
 
    devise :database_authenticatable, :registerable, 
 
     :recoverable, :rememberable, :trackable, :validatable 
 
    has_many :posts 
 
    has_many :locations 
 
end

Answer 1

根據討論，如果你想獲得用戶ip，然後用它來獲取address。 ..您可以使用中的以下代碼與ip已存在於users表中。

Devise將用戶的當前和最後一個IP地址自動存儲在用戶表中。它使用的列名是「current_sign_in_ip」，「last_sign_in_ip」。

考慮用戶模式與已知的IP地址，自動獲取座標，並存儲在緯度和經度屬性：

# app/models/user.rb 
geocoded_by :current_sign_in_ip, 
    :latitude => :lat, :longitude => :lon 
after_validation :geocode