我想bash从一个执行一些命令Rakefile.
我在我的尝试中尝试了以下内容 Rakefile
task :hello do
%{echo "World!"}
end
但在执行rake hello时没有输出？如何从Rakefile执行bash命令？
注意:这不是重复,因为它具体询问如何从Rakefile执行bash命令.
有没有办法配置rails默认使用haml,即生成脚手架时生成的scaffold_name/index.html.haml是而不是scaffold_name/index.html.erb.
类似于您可以添加config.sass.preferred_syntax = :sass到默认情况config/application.rb并scaffold_name.sass生成的方式.
尝试添加以下内容 config/application.rb
config.generators do |g|
g.template_engine :haml
end
但结果如下
$ rails generate scaffold foo name:string
invoke active_record
create db/migrate/20120208152550_create_foos.rb
create app/models/foo.rb
invoke test_unit
create test/unit/foo_test.rb
create test/fixtures/foos.yml
route resources :foos
invoke scaffold_controller
create app/controllers/foos_controller.rb
error haml [not found]
invoke test_unit
create test/functional/foos_controller_test.rb
invoke helper
create app/helpers/foos_helper.rb
invoke test_unit
create test/unit/helpers/foos_helper_test.rb
invoke assets
invoke coffee
create app/assets/javascripts/foos.js.coffee
invoke sass
create app/assets/stylesheets/foos.css.sass
invoke sass
identical app/assets/stylesheets/scaffolds.css.sass
$ rails …我在这里有一定的困难,我无法成功地调用它属于一种方法ProjectPage 模型的ProjectPage 控制器.
我在我的ProjectPage控制器中:
def index
@searches = Project.published.financed
@project_pages = form_search(params)
end
在我的ProjectPage 模型中:
def form_search(searches)
searches = searches.where('amount > ?', params[:price_min]) if check_params(params[:price_min])
@project_pages = ProjectPage.where(:project_id => searches.pluck(:'projects.id'))
end
但是,我无法成功调用该form_search 方法.
每当我使用heroku_san gem部署到Heroku(Ruby on Rails应用程序)时,它会说:
Cleaning up the bundler cache.
Would have removed sitemap_generator (2.0.1.pre1)
Would have removed newrelic_rpm (3.5.5.38)
Would have removed httparty (0.10.0)
Would have removed thor (0.16.0)
Would have removed ckeditor (3.7.1)
Would have removed fog (1.8.0)
Would have removed rake (0.9.2.2)
Would have removed dalli (2.6.0)
(或者我之前部署中可能拥有的任何其他旧gem)如何清除Heroku应用程序中的bundler缓存？我试着跑:
heroku run bundle clean --force
但它没有帮助.
谁能告诉我如何在Heroku中清理捆绑缓存？或者如果我应该忽略这个消息？
我的输入数字是一个int.但输入数字必须在-2055到2055的范围内,我想通过使用正则表达式来检查.
那么无论如何要写一个正则表达式来检查一个数字是否在(-2055,2055)中？
if语句用于检查数字是否在范围内更容易.但是我正在写一个解释器,所以我应该使用正则表达式来检查输入数字
以下代码如何工作以及变量的含义:
y = (x << shift) | (x >> (sizeof(x)*CHAR_BIT - shift));
我在循环转换文章中找到了但没有解释它是如何工作的.
我正在使用Node.js中的请求模块来执行put请求.我的代码看起来像这样
var request = require('request');
var data = {foo: "bar", woo: "car"};
request({
method: 'PUT',
uri: myURL,
multipart: [{
'content-type':'application/json',
body: JSON.stringify(data)
}]
}, function(error, request, body){
console.log(body);
});
当我运行这个时,我收到一个错误:
"不支持的内容类型:application/json"
我有以下coffeescript代码来生成和警告框:
show_alert = () ->
alert("Hello! I am an alert box!")
编译为:
(function() {
var show_alert;
show_alert = function() {
return alert("Hello! I am an alert box!");
};
}).call(this);
在我的HTML中我有以下内容
<input onclick='show_alert()' type='button' value='Show alert box' />
但是,没有显示警告框？以下是从浏览器复制的html:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Test Rails Application</title>
<style type='text/css'>.application h1 {
color: lime; }
</style>
<script type='text/javascript'>(function() {
var show_alert;
show_alert = function() {
return alert("Hello! I am an alert box!");
};
}).call(this);
</script>
</head>
<body> …使用CoffeeScript extends与Backbone.js 之间的根本区别是extend什么？
例如,怎么样
class User extends Backbone.Model
不同于
User = Backbone.Model.extend()
创建一个全新的rails应用程序之后在官方rails博客文章后,尝试将应用程序转换为rails 3.2.0.rc2会产生以下结果
Updated Gemfile to depend on rails ~> 3.2.0.rc2
gem 'rails', '~>3.2.0.rc2'
Updated Gemfile to depend on sass-rails ~> 3.2.3
gem 'sass-rails', '~> 3.2.3'
$ bundle install
Fetching source index for http://rubygems.org/
Bundler could not find compatible versions for gem "activesupport":
In snapshot (Gemfile.lock):
activesupport (3.1.1)
In Gemfile:
rails (~> 3.2.0.rc2) ruby depends on
activesupport (= 3.2.0.rc2) ruby
Running `bundle update` will rebuild your snapshot from scratch, using
only the gems in your Gemfile, which may resolve …coffeescript ×2
javascript ×2
ruby ×2
backbone.js ×1
bash ×1
bundler ×1
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haml ×1
heroku ×1
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html ×1
http-put ×1
inheritance ×1
methods ×1
model ×1
node.js ×1
ocaml ×1
rake ×1
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ruby-1.9.3 ×1