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How can I rename a database column in a Ruby on Rails migration?
...mething else or do nothing
end
end
For Rails 3.1 use:
While, the up and down methods still apply, Rails 3.1 receives a change method that "knows how to migrate your database and reverse it when the migration is rolled back without the need to write a separate down method".
See "Active Record...
Two versions of python on linux. how to make 2.7 the default
...'t actually want to change your default Python.
Your distro installed a standard system Python in /usr/bin, and may have scripts that depend on this being present, and selected by #! /usr/bin/env python. You can usually get away with running Python 2.6 scripts in 2.7, but do you want to risk it?
O...
How can I read large text files in Python, line by line, without loading it into memory?
...d to read a large file, line by line. Lets say that file has more than 5GB and I need to read each line, but obviously I do not want to use readlines() because it will create a very large list in the memory.
...
How can I print a circular structure in a JSON-like format?
I have a big object I want to convert to JSON and send. However it has circular structure. I want to toss whatever circular references exist and send whatever can be stringified. How do I do that?
...
Git status ignore line endings / identical files / windows & linux environment / dropbox / mled
...t setting on some work project. On work I must use windows, home I use mac and linux. Before this I had the same problem as you, after that setting everything was ok.
– Saša Šijak
Dec 12 '13 at 15:26
...
Django class-based view: How do I pass additional parameters to the as_view method?
...<module> import ) should be avoided". Should isn't as strong as must and this is an example but yes definitely *should avoid wildcard imports: python.org/dev/peps/pep-0008/#imports
– user9903
Apr 4 '18 at 15:55
...
How to do a https request with bad certificate?
...
Security note: Disabling security checks is dangerous and should be avoided
You can disable security checks globally for all requests of the default client:
package main
import (
"fmt"
"net/http"
"crypto/tls"
)
func main() {
http.DefaultTransport.(*http.Trans...
Redirect to an external URL from controller action in Spring MVC
...equestMapping(value = "/redirect", method = RequestMethod.GET)
public ModelAndView method() {
return new ModelAndView("redirect:" + projectUrl);
}
share
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搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...ersion v2.4.6
……..
[initandlisten] waiting for connections on port 27017
[websvr] admin web console waiting for connections on port 28017
mongodb默认自带提供了web访问接口，通过 IP + 端口的形式可以访问。
http://192.168.0.1:28017/
二、主从模式。使用mysql数...
How to pass arguments into a Rake task with environment in Rails? [duplicate]
...ironment using the :needs option. For example:
desc "Testing environment and variables"
task :hello, :message, :needs => :environment do |t, args|
args.with_defaults(:message => "Thanks for logging on")
puts "Hello #{User.first.name}. #{args.message}"
end
Updated per @Peiniau's comment...