Question

我有一个名为GuestOrder的模型：

class GuestOrder < ActiveRecord::Base
end

# == Schema Information
#
# Table name: guest_orders
#
#  id             :integer         not null, primary key
#  notes          :string(255)
#  adults         :integer
#  children       :integer
#  created        :datetime
#  placed         :datetime
#  billed         :datetime
#  user_id        :integer
#  guest_table_id :integer
#  take_away_id   :integer
#  created_at     :datetime
#  updated_at     :datetime

和控制器

class ApiController < ApplicationController
  def getOrdersByDate
    @guest_orders = GuestOrder.where(:created_at => (params[:created]))
    render json: @guest_orders
  end
end

在routes.rb

  match '/api/getOrdersByDate'

当我尝试在url中获取此信息时

http://localhost:3000/api/getOrdersByDate?:created=2012-4-5

我得到了所有不受日期限制的记录

在服务器中我得到select * from guest_orders

Started GET "/api/getOrdersByDate?:created=2012-4-5" for 127.0.0.1 at 2012-04-06 13:19:59 +0530
  Processing by ApiController#getOrdersByDate as HTML
  Parameters: {":created"=>"2012-4-5"}
  GuestOrder Load (26.3ms)  SELECT "guest_orders".* FROM "guest_orders"
Completed 200 OK in 47ms (Views: 1.5ms | ActiveRecord: 26.3ms)


Started GET "/api/getOrdersByDate?:created=2012-4-5" for 127.0.0.1 at 2012-04-06 13:21:21 +0530
  Processing by ApiController#getOrdersByDate as HTML
  Parameters: {":created"=>"2012-4-5"}
  GuestOrder Load (1.7ms)  SELECT "guest_orders".* FROM "guest_orders"
Completed 200 OK in 47ms (Views: 1.4ms | ActiveRecord: 1.7ms)

我的数据库中的记录包含日期2012-03-22, 2012-04-05, 2012-04-06

的记录

如何在getOrdersByDate中查询以获取特定日期的记录。

Answer 1

您的请求中不需要冒号，HashWithIndifferentAccess可以为您执行sym查找。

http://localhost:3000/api/getOrdersByDate?created=2012-4-5

但问题看起来很有意思，因为将nil传递到where条件会导致以下查询：

SELECT "guest_orders".* FROM "guest_orders" WHERE "created_at" IS NULL

在您的情况下，缺少整个SQL WHERE条件。

更新＃1

似乎需要重装。

要获取日期的记录，您可以使用以下方法：

time = Time.zone.parse(params[:created])
range = time.beginning_of_day..time.end_of_day
@guest_orders = GuestOrder.where(:created_at => range)

更新＃2

如果您有开始日期和结束日期：

t_start = Time.zone.parse(params[:start])
t_end = Time.zone.parse(params[:end])
range = t_start.beginning_of_day..t_end.end_of_day
@guest_orders = GuestOrder.where(:created_at => range)

Answer 2

您可以使用此查询按日期获取记录

    @results = GuestOrder.where("created_at = ? ", params[:created])

试试吧

如何通过用户定义的方法从日期中选择sqlite3中的记录？

2 个答案:

更新＃1

更新＃2