rails generate migration enable_pgcrypto_extension
class EnablePgcryptoExtension < ActiveRecord::Migration[5.1]
def change
enable_extension 'pgcrypto'
end
end
| title |
| <!-- Code from d3-graph-gallery.com --> | |
| <!DOCTYPE html> | |
| <meta charset="utf-8" /> | |
| <!-- Load d3.js --> | |
| <script src="https://d3js.org/d3.v4.js"></script> | |
| <!-- Create a div where the graph will take place --> | |
| <div id="my_dataviz"></div> |
rails generate migration enable_pgcrypto_extension
class EnablePgcryptoExtension < ActiveRecord::Migration[5.1]
def change
enable_extension 'pgcrypto'
end
end
| https://www.youtube.com/watch?v=RS36gBEp8OI&feature=youtu.be | |
| make the state and amethod that change it in parent | |
| -> | |
| send the method that manipulate state to children | |
| -> | |
| children then call the method |
| cd /mnt/$yourdrivealphabet | |
| default: &default | |
| adapter: postgresql | |
| encoding: unicode | |
| # For details on connection pooling, see Rails configuration guide | |
| # http://guides.rubyonrails.org/configuring.html#database-pooling | |
| pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %> | |
| username: username in postgres windows | |
| password: pass in postgres windows |
| files.download('example.txt') # from colab to browser download |
| aws s3 source tujuan | |
| example | |
| aws s3 sync s3://mybucket . | |
| output | |
| download: s3://mybucket/test.txt to test.txt | |
| download: s3://mybucket/test2.txt to test2.txt |
| Method | Uses Default Accessor | Saved to Database | Validations | Callbacks | Touches updated_at | Readonly check |
|---|---|---|---|---|---|---|
attribute= |
Yes | No | n/a | n/a | n/a | n/a |
write_attribute |
No | No | n/a | n/a | n/a | n/a |
update_attribute |
Yes | Yes | No | Yes | Yes | Yes |
attributes= |
Yes | No | n/a | n/a | n/a | n/a |
update |
Yes | Yes | Yes | Yes | Yes | Yes |
update_column |
No | Yes | No | No | No | Yes |
update_columns |
No | Yes | No | No | No | Yes |
User::update |
Yes | Yes | Yes | Yes | Yes | Yes |
| heroku pg:backups:capture | |
| heroku pg:backups:download | |
| pg_restore --verbose --clean --no-acl --no-owner -h localhost -d rails_development latest.dump |
| parse_git_branch() { | |
| git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/' | |
| } | |
| PS1="${debian_chroot:+($debian_chroot)}\w\$(parse_git_branch) $ " |