小编Cod*_*ang的帖子

环境:Mac OSX 10.10.当我尝试使用时gitk,它显示:

Coda-2:~ Coda$ gitk
-bash: gitk: command not found

我认为原因是旧版本git.这是一些信息,我已经输入了brew update.

Coda-2:~ Coda$ git --version
git version 1.9.3 (Apple Git-50)
Coda-2:~ Coda$ brew install git 
Warning: git-2.4.0 already installed, it's just not linked

这是什么信息:it's just not linked？

此外,我检查路径git:

Coda-2:~ Coda$ which git
/usr/bin/git

它应该在/usr/bin/local/git？怎么解决？

UPDATE

我明白了,谢谢@TimCastelijns.

brew doctor 说过:

Warning: You have unlinked kegs in your Cellar
Leaving kegs unlinked can lead to build-trouble and cause …

我正在使用Watir抓取一些东西,但它会抛出

Unable to find Mozilla geckodriver. Please download the server from https://github.com/mozilla/geckodriver/releases and place it

我已经完成了以下步骤.

下载最新的firefox(版本50.0)

我geckodriver从https://github.com/mozilla/geckodriver/releases下载最新版本,并将其放入~/geckodriver

然后加入export PATH=$PATH:~/geckodriver到~/.bash_profile和源它.

这是我执行的代码

require 'watir-webdriver'
browser = Watir::Browser.new :firefox # should open a new Firefox window
browser.goto 'http://nitrowriters.com/form/form.html' # or type the local path to your downloaded copy

的Gemfile

source "https://rubygems.org"
gem  'nokogiri'
gem  'watir-webdriver'
gem  'open_uri_redirections'
gem  'selenium-webdriver'
gem  "watir", ">= 6.0.0.beta2"

环境:OSX 10.10

如何在 GoLang 中发送帖子？

我有以下代码ruby，现在我需要转入Golang。

http = Net::HTTP.new('example.com', 443)
http.use_ssl = true
http

path = '/abc/login'
data = 'data[Account][username]=myusername&data[Account][passwd]=mypassword'
resp, _ = http.post(path, data)

这样，我可以在登录请求后获取 cookie。

但我不知道如何在 Go 中发送 post 请求。

我已经编写了以下代码。

path := "https://example.com/abc/login"
data := strings.NewReader("data[Account][username]=myusername&data[Account][passwd]=mypassword")
resp, err := http.Post(path, "text/html; charset=UTF-8", data)

这似乎不正确，因为我没有找到获取 cookie 的方法。

我有三个型号:Book,genre,BookGenre,这里有关系:

class BookGenre < ActiveRecord::Base
  belongs_to :book
  belongs_to :genre
end


class Book < ActiveRecord::Base
  has_many :book_genres
  has_many :genres, through: :book_genres
end


class Genre < ActiveRecord::Base
  has_many :book_genres
  has_many :books, through: :book_genres
end

然后我使用seedfile将数据放入这些表中.

但是,当我想再做rake db:seed一次时,它显示了这个错误

ActiveRecord::InvalidForeignKey: PG::ForeignKeyViolation: ERROR:  update or delete on table "books" violates foreign key constraint "fk_rails_4a117802d7" on table "book_genres"
DETAIL:  Key (id)=(10) is still referenced from table "book_genres".

在我的seed.rb

Book.destroy_all
Genre.destroy_all
...create data 

我需要placeholder在输入字段中放入一个长文本.

但是,placeholder由于文本很长,将会削减.

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<label for="password">
  <input id="password" name="user[password]" placeholder="Password (at least 8 letters, numbers, or punctuation marks)" size="30" type="password">
</label>

有没有办法让它成为这个？

升级到OS10.14后，使用时出现此错误 Httparty

    response = HTTParty.get('http://api.stackexchange.com/2.2/questions?site=stackoverflow')
objc[4182]: +[__NSPlaceholderDictionary initialize] may have been in progress in another thread when fork() was called.
objc[4182]: +[__NSPlaceholderDictionary initialize] may have been in progress in another thread when fork() was called. We cannot safely call it or ignore it in the fork() child process. Crashing instead. Set a breakpoint on objc_initializeAfterForkError to debug.

export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES在启动Rails控制台之前，我已经尝试 过了。

但这没有用。

我试图用Ruby on Rails运行Selenium的示例scirpt.我要用代理运行它.这是我的代码:

require 'rubygems'
require 'bundler/setup'

# require your gems as usual
require "selenium-webdriver"

Selenium::WebDriver::Firefox.path = "/home/marc/Documents/firefox/firefox"
profile = Selenium::WebDriver::Firefox::Profile.new
proxy = Selenium::WebDriver::Proxy.new(:http => nil)
profile.proxy = proxy
driver = Selenium::WebDriver.for :firefox, :profile => profile
driver.navigate.to "http://google.com"

element = driver.find_element(:name, 'q')
element.send_keys "Hello WebDriver!"
element.submit

puts driver.title

driver.quit

我收到以下错误:

/home/marc/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/selenium-webdriver-3.0.0.beta3.1/lib/selenium/webdriver/common/service.rb:115:in `connect_until_stable': unable to connect to Mozilla geckodriver 127.0.0.1:4445 (Selenium::WebDriver::Error::WebDriverError)

有人能帮我吗...？我几个小时都在努力,找不到问题......真的不知道该怎么办.

环境:

Ubuntu 16.04 LTS,Firefox 45.0,rbenv 2.3.1

其他问题:有人知道Selenium + Ruby on Rails的一些例子吗？我找不到真正的好东西......文档很差:(

请参阅以下关联:

class Continent < ActiveRecord::Base
    has_many :countrys

class Country < ActiveRecord::Base
    belongs_to :continent
    has_many :addresses

class Address < ActiveRecord::Base
    belongs_to :person
    belongs_to :street

class Person < ActiveRecord::Base
    has_many :addresses

Person.includes()在查询数据库时,如何从一直到非洲大陆开始并包含关联.

我已经能够通过国家进入.includes(addresses: :country),但似乎没有达到最后一级.

我对教程中的以下代码感到困惑。

目标是genre_id从表中删除引用键books

class RemoveGenreFromBooks < ActiveRecord::Migration

    def up
        remove_index :books, column: [:genre_id]
        remove_column :books, :genre_id
    end

    def down
        add_reference :books, :genre, index: true
    end

end

但我不明白什么remove_index :books, column: [:genre_id]意思

此外，我没有index: true在down方法中得到这一点。

如果我需要添加关系，为什么我不能直接输入

class Addrelationship < ActiveRecord::Migration
    def change
            add_reference :books, :genre
    end

我正在OS X 10.10上开发Unity 2D游戏项目,我无法拖动文件或文件夹,它会显示此错误.

No Drag&Drop has been setup. Please
UnityEditor.DockArea:OnGUI()

我试过了:

1. 保存项目,然后重新启动
2. 单击Assets文件夹并选择Reimport All

但它似乎不起作用,如何解决它？