我在服务器机器上运行bundle install - 数字海洋,它总是像这样被杀死:
RVM used your Gemfile for selecting Ruby, it is all fine - Heroku does that too,
you can ignore these warnings with 'rvm rvmrc warning ignore /home/rails/car_main/Gemfile'.
To ignore the warning for all files run 'rvm rvmrc warning ignore allGemfiles'.
Don't run Bundler as root. Bundler can ask for sudo if it is needed, and installing your bundle as
root will break this application for all non-root users on this machine.
Fetching gem metadata from https://rubygems.org/......... …Run Code Online (Sandbox Code Playgroud) 我尝试将heroku表列从字符串更改为整数时运行了迁移:这是我的迁移:
class ChangePriceTypeInItems < ActiveRecord::Migration
def change
change_column :items, :price, :integer
end
end
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这是我的错误:我该怎么办?
ActiveRecord::StatementInvalid: PG::Error: ERROR: column "price" cannot be cast automatically to type integer
HINT: You might need to specify "USING price::integer".
: ALTER TABLE "items" ALTER COLUMN "price" TYPE integer
Run Code Online (Sandbox Code Playgroud) 我正在用photoshop素描制作一个网站。我有一个文本机智
字体家族Segoe Ui和字体样式:Light。在photoshop中看起来像这样:
那么如何在CSS中将其设置为p元素呢?
p {
}
Run Code Online (Sandbox Code Playgroud) 我试图在Windows上运行react-native并得到以下错误:
C:\Program Files>react-native init AwesomeProject
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这将引导您在C:\ Program Fil es\AwesomeProject中创建一个新的React Native项目从npm安装react-native软件包... events.js:141 throw er; //未处理的'错误'事件^
错误:在exports._errnoException产卵NPM ENOENT(util.js中:860:11)在Process.ChildProcess._handle.onexit(内部/ child_process.js:178:32)在onErrorNT(内部/ child_process.js:344:16)在doNTCallback2(node.js中:450:9)在process._tickCallback(node.js中:364:17)在Function.Module.runMain(module.js:459:11)在启动时(node.js中:136:18)在node.js:972:3
我该如何解决?
CoffeScript代码:
department = ->
console.log 1
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这编译成js代码:
// Generated by CoffeeScript 1.6.3
(function() {
var department;
department = function() {
return console.log(1);
};
}).call(this);
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我有一个按钮:
<button onclick = "department()" >add department</button>
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但是当我点击它时会抛出一个错误:
未捕获的ReferenceError:未定义部门
所以我该怎么做?
嗨,我有一些文字和一行。
我需要使图片看起来像这样:

在我的 HTML 代码中,它看起来像这样:
<div class="container">
<div class="line"></div>
<h2>Some Text!!!</h2>
<div class="line"></div>
</div>
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CSS:
.container {
text-align: center;
}
.line {
height: 5px;
background: #FFEE90;
}
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我应该写什么来将文本放在行之间?
我有 3 个模型:
class Project(models.Model):
...
class Group(models.Model):
project = models.ForeignKey(Project, on_delete=models.CASCADE,
related_name="groups")
class Word(models.Model):
group = models.ForeignKey(Group, on_delete=models.CASCADE, null=True,
related_name="words")
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我想获取项目中的所有单词。我该怎么做呢?
我用Google搜索一些像这样的问题, LINK1或此链接2,它从这个答案是kurento和的WebRTC不支持Safari和IE浏览器似乎.但我从一个人的Skype中听到(这个联系人已经丢失,所以现在不能问任何细节),我听说最后一个版本支持使用flash.所以我很困惑.最新版本支持kurento和webrtc吗?当我发现这个caniuse.com链接时,我有点困惑
我有一个错误
2017-01-15 00:49:14,075 :Error running WSGI application
2017-01-15 00:49:14,076 :ImportError: No module named flask.ext.cors
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它发生在我添加之后:
from flask.ext.cors import CORS
cors = CORS(app, resources={r"/api/*": {"origins": "*"}})
Run Code Online (Sandbox Code Playgroud) 我想使用 nightmare js 下载文件。
我试着用这个:https : //github.com/rosshinkley/nightmare-inline-download
我试着跑
npm install --save nightmare-inline-download
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但是 git 这个:
`npm ERR! Windows_NT 10.0.15063
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\
npm ERR! node v6.9.5
npm ERR! npm v3.10.10
npm ERR! code E404
npm ERR! 404 Registry returned 404 for GET on https://registry.npmjs.org/nightma
npm ERR! 404
npm ERR! 404 'nightmare-inline-dowload' is not in the npm registry.
npm ERR! 404 You should bug the author to publish it (or use the name yourself!)
npm ERR! …Run Code Online (Sandbox Code Playgroud) css ×2
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