小编tom*_*nek的帖子

我想在我的页面输出显示我的一个传感器(湿气)连接到Arduino.

下面的脚本,每隔一秒给我一些值(数字).

require 'dino'

board = Dino::Board.new(Dino::TxRx.new)
sensor = Dino::Components::Sensor.new(pin: 'A0', board: board)

on_data = Proc.new do |data|
  puts data
  sleep 1
end

sensor.when_data_received(on_data)

sleep

我想我可以Sinatra用作API和Javascript脚本来显示异步输出.

所以这应该是这样的

%w(sinatra dino haml).each do |lib|
  require lib
end

board = Dino::Board.new(Dino::TxRx.new)
sensor = Dino::Components::Sensor.new(pin: 'A0', board: board)
sleep 1

get '/' do
  haml :index
end

get '/moisture' do
  on_data = Proc.new do |data|
    { moisture_value: data }
    sleep 1
  end

  sensor.when_data_received(on_data)
end

你能给我一些提示或简单的好模式我应该如何处理？

我找到了样本sinatra app fo dino:https: …

当我尝试将用户编辑为管理员时,我想跳过验证.

模型

class User
  ...
  attr_accessible :company_id, :first_name, :disabled, as: :admin

调节器

class Admin::UsersController
  ...
  def update
    @user = User.find(params[:id])
    @user.update_attributes(params[:user], as: :admin)
    redirect_to edit_admin_user_path(@user), :notice => "User Account Updated"
  end

所以我试着改变update行动

def update
  @user = User.find(params[:id])
  @user.attributes = params[:user]
  @user.save(validate: false)
  redirect_to edit_admin_user_path(@user), :notice => "User Account Updated"
end

但后来我没有访问set :disabled和:company_id属性,因为我不知道在哪里设置as: :admin

如何避免sleep 1在该示例中使用等待ES索引完成？

describe Question do
  before do
    create :question, content: "Some test question",
                      app: @app
    create :question, content: "Some other question",
                      app: @app
    sleep 1
  end

  it_behaves_like "search results found" do
    let(:query) { "Some" }
    let(:results) { ["Some test question", "Some other question"] }
  end
end

我有跟随表单对象来管理复杂的嵌套表单.

形成

= simple_form_for(@profile_form, :url => profiles_path) do |f|
  ...

路线

resources :profiles

调节器

class ProfilesController < ApplicationController
  def new
    @profile_form = ProfileForm.new
  end

  def edit
    @profile_form = ProfileForm.new(params[:id])
  end

  def create
    @profile_form = ProfileForm.new
    if @profile_form.submit(params[:profile_form])
      redirect_to @profile_form.profile, notice: 'Profile was successfully created.'
    else
      render action: "new"
    end
  end

  def update
    @profile_form = ProfileForm.new(params[:id])
    if @profile_form.submit(params[:profile_form])
      redirect_to @profile_form.profile, notice: 'Profile was successfully updated.'
    else
      render action: "edit"
    end
  end
end

表格对象

class ProfileForm
  include ActiveModel::Validations
  include ActiveModel::Conversion
  extend ActiveModel::Naming …

我想我的终端当前目录遵循我的VIM。

例：

在终端：

> pwd
=> /Users/rege
> vim

然后在VIM中

:cd /Users/rege/project
<Ctrl-z>(for suspend)

在终端

> pwd
=> /Users/rege/project

我正在使用MacOS，zsh，tmux。

我需要这个，因为当我试图在VIM中使用标签时，标签是从我的终端目录而不是vim中签入项目的。

因此，当我更改VIM当前目录时，总是需要更改终端当前目录。

例如我有文字:

"testestestestt testestestes <img src='image.jpg'>"

我想写函数检查字符串是否是img标签并返回true

我有简单的jbuilder视图

json.id pharmaceutic.id
json.name pharmaceutic.name
json.dosage pharmaceutic.dosage.name

什么时候 pharmaceutic.dosage => nil

我呈现的json如下所示:

{"id":1,"name":"HerzASS ratiopharm","dosage":null}

我想为所有jBuilder视图设置一些属性,nil它应该呈现为空字符串.

{"id":1,"name":"HerzASS ratiopharm","dosage":""}

怎么实现呢？

我想选择一个hour(10, 11, 12, 13, 14, 15)来自select_box和日期params[:call_date]

# params[:call_date] => "2013-11-05"
= simple_form_for @welcome_call do |f|
  = f.input :call_at, as: :datetime
  = f.association :user, collection: User.all
  = f.submit

如何使用字符串foreign_key设置关联以正确设置has_one？

class Pharmaceutic < ActiveRecord::Base
  has_one :pharmaceutic_group, foreign_key: "code"
end

class PharmaceuticGroup < ActiveRecord::Base
  belongs_to :pharmaceutic, primary_key: 'code'
end

>> Pharmaceutic.last.pharmaceutic_group                                                                                        
  Pharmaceutic Load (0.3ms)  SELECT `pharmaceutics`.* FROM `pharmaceutics` ORDER BY `pharmaceutics`.`id` DESC LIMIT 1
  PharmaceuticGroup Load (0.3ms)  SELECT `pharmaceutic_groups`.* FROM `pharmaceutic_groups` WHERE `pharmaceutic_groups`.`code` = 2 ORDER BY `pharmaceutic_groups`.`id` ASC LIMIT 1
=> nil
>> Pharmaceutic
=> Pharmaceutic(id: integer, package_type: integer, group_code: string)
>> PharmaceuticGroup
=> PharmaceuticGroup(id: integer, code: string, name: string)

例如,当:Pharmaceutic有group_code:aaa和PharmaceuticGroup有代码:aaa我想得到Pharmaceutic.last.pharmaceutic_group.name => 'AAA group …

我想要像这样的方法

Shift.by_quarter(1) => each shift in first quarter of current year

现在我正在按日期选择一个季度班次

Shift
  scope :by_quarter, lambda{|date| 
    where starts_at: date.beginning_of_quarter..date.end_of_quarter}