同求

只想去看妹纸

通过 elasticsearch-transport 和 自定义 faraday middleware

PS：专修各种，150 起~

#3 楼 @babybird 赶紧下载我们的 女神经 app 测下颜值，体验下人脸识别

#4 楼 @thxagain 参看 https://github.com/mimosa/ansj_seg 中的源码。

JRuby

# config/initializers/time_with_zone.rb

if defined?(::ActiveSupport)
  # ActiveSupport::JSON::Encoding.use_standard_json_time_format = false

  class ActiveSupport::TimeWithZone
    def as_json(opts = {}) # 可配置数据格式
      opts.assert_valid_keys(:date_format)
      opts[:date_format] ||= :default # 默认时间格式

      if ActiveSupport::JSON::Encoding.use_standard_json_time_format
        xmlschema(ActiveSupport::JSON::Encoding.time_precision)
      else
        self.to_s opts[:date_format]
      end
    end
  end
end

#4 楼 @roclv 了解，thx

有个地方不明白，复杂的 scope 写成一个 Query 对象，这个文件放在那里？怎么看起来像个 Service

目前的做法是写成 concerns 再 include 到 model类里。

#11 楼 @Cger007 用减好吗

[1] pry(main)> [4, 5, 3] & []
=> []
[2] pry(main)> [4, 5, 3] - []
=> [4, 5, 3]

#8 楼 @Cger007 那楼上的方法就可以啦。

同组测试：

[1] pry(main)> # 当前用户的GROUP
[2] pry(main)> current_user_groups = ['ADMIN', 'USER']
=> ["ADMIN", "USER"]
[3] pry(main)> # 被指派用户的GROUP
[4] pry(main)> assigned_user_groups = ['USER', 'TEST', 'GUEST']
=> ["USER", "TEST", "GUEST"]
[5] pry(main)> diff_group(current_user_groups, assigned_user_groups)
=> false

异组测试：

[1] pry(main)> # 当前用户的GROUP
[2] pry(main)> current_user_groups = ['ADMIN', 'USER', 'TEST']
=> ["ADMIN", "USER", "TEST"]
[3] pry(main)> # 被指派用户的GROUP
[4] pry(main)> assigned_user_groups = ['TEST', 'GUEST']
=> ["TEST", "GUEST"]
[5] pry(main)> diff_group(current_user_groups, assigned_user_groups)
=> true

我在用 gem 'bower-rails', '~> 0.11.0'

#6 楼 @Cger007 所以请问怎样的两组才算是不同的？给两组测试数据呗

def diff_group(a, b, c = ['TEST'])
  (a & b - c).empty?  
end 

#3 楼 @Cger007 你的代码本身就有错

# 当前用户的GROUP
current_user_groups = ['ADMIN', 'USER']
# 被指派用户的GROUP
assigned_user_groups = ['USER', 'TEST', 'ADMIN']
=> true

起码应该这样：

# 判断指派人与被指派人是否同组
def diff_group(a, b)
  diff = false # 设置默认为同组
  a.each do |k|
    b.each do |e|
      puts "#{k} <=> #{e}"
      diff = (k != e && e!= "TEST")
    end
  end
  diff
end

如果是俺理解错了，那也该这样：

# 判断指派人与被指派人是否同组
def diff_group(a, b)
  a.each do |k|
    b.each do |e|
      if k != e && e!= "TEST"
        puts "#{k} <=> #{e}"
        return true
      end
    end
  end
  false # 设置默认为同组
end

[1] pry(main)> [1,2,3] & [2,3,4]
=> [2, 3]

#4 楼 @thxagain [2, 3] 不会出现？

([2, 3, 4] | ([1, 2, 3] & [4, 5, 6] )).sample(2)

有意思

默认编译参数：

ruby -r rbconfig -e 'RbConfig::CONFIG.sort.each { |c| p c }'
・
["optflags", "-O3 -fno-fast-math"]
・
・

rbenv 可以这样：

OPTFLAGS='-O3 -fno-fast-math -mllvm -inline-threshold=5000' rbenv install 2.3.1

ruby -r rbconfig -e 'puts RbConfig::CONFIG["OPTFLAGS"]'
→ -O3 -fno-fast-math -mllvm -inline-threshold=5000

要讲求沟通技巧，小项目用什么 PHP 呀，杀鸡用牛刀

statistical_charging_piles 是什么，方法？

#6 楼 @yu7272yu kaminari 可以分页。

#3 楼 @yu7272yu

params[:order_total] = case params[:order_total]
when 'gt'
 '>'
when 'gteq'
 '>='
when 'lt'
 '<'
when 'lteq'
 '<='
else
 '='
end


...
.having("order_total_sum #{params[:order_total]} ? ", params[:order_total_cont] )
...

这需要一种建立一种机制，客户端收到消息后回执，标注过的消息从队列中删除，客户端上线（subscribed）后触发（未标示）队列。

# -*- encoding: utf-8 -*-

class NotificationsChannel < ApplicationCable::Channel
  def subscribed
    stop_all_streams
    stream_from channel_id
    count # 连接后可触发
  end

  def unsubscribed
    stop_all_streams
  end

  def speak(data)
    ActionCableWorker.perform_async(channel_id, data) # Sidekiq 任务
  end

  def count
    speak( message: "当前连接数: #{ActionCable.server.connections.count}" )
  end

  private
    def channel_id
      "notifications:#{self.user_id || 'public'}"
    end
end

Let's Encrypt Authority X3

@charleszhang 试试呗。

# in app/middleware/catch_json_parse_errors.rb
class CatchJsonParseErrors
  def initialize(app)
    @app = app
  end

  def call(env)
    begin
      @app.call(env)
    rescue ActionDispatch::Http::Parameters::ParseError => e
      if env['HTTP_ACCEPT'] =~ /application\/json/
        error_output = "There was a problem in the JSON you submitted: #{e.message}"
        return [
          400, { "Content-Type" => "application/json" },
          [ { status: 400, error: error_output }.to_json ]
        ]
      else
        raise error
      end
    end
  end
end


# in config/application.rb
module YourApp
  class Application < Rails::Application
    # ...
    config.middleware.insert_after ActionDispatch::ShowExceptions, 'CatchJsonParseErrors'
    # ...
  end
end

#2 楼 @charleszhang Rails5 移除了 ActionDispatch::ParamsParser

# insert middleware wherever you want in the stack, optionally pass initialization arguments
  config.middleware.insert_before ActionDispatch::ParamsParser, Rack::Robustness do |c|
    c.no_catch_all
    c.on(ArgumentError) { |ex| 400 }
    c.content_type 'application/json'
    c.body{ |ex| 
      { 
        error: ex.message
      }.to_json
    }
    c.ensure(true) { |ex| env['rack.errors'].write(ex.message) }
  end if Rails.env.production? # 生产环境

不优化你的 SQL 逻辑，简单可以这样

plan = Plan.where('((start_time >= :start_at and start_time <= :end_at) or (end_time >= :end_at and end_time <= :end_at) or (start_time <= ? and start_time >= ?) or (start_time >= ? and start_time <= ?) or (start_time <= ? and end_time >= ?))',start_at: start_at, end_at : end_at)

PS: 问号我就不帮你一一替换了，手机不方便输入。