- You MUST NOT try and generate a Rails app from scratch on your own by generating each file. For a NEW app you MUST use
rails new
first to generate all of the boilerplate files necessary. - Create an app in the current directory with
rails new .
- Use Tailwind CSS for styling. Use
--css tailwind
as an option on therails new
call to do this automatically. - Use Ruby 3.2+ and Rails 8.0+ practices.
- Use the default Minitest approach for testing, do not use RSpec.
- Default to using SQLite in development.
rails new
will do this automatically but take care if you write any custom SQL that it is SQLite compatible. - An app can be built with a devcontainer such as
rails new myapp --devcontainer
but only do this if requested directly. - Rails apps have a lot of directories to consider, such as app, config, db, etc.
- Adhere to MVC conventions: singular model names (e.g., Product) map to plural tables (products); controllers are plural.
- Guard against incapable browsers accessing controllers with `allo
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compressed_filestream = Zip::OutputStream.write_buffer(::StringIO.new(''), Zip::TraditionalEncrypter.new('password')) do |zos| | |
#First file | |
zos.put_next_entry "test1.csv" | |
csv = CSV.generate do |csv| | |
User.all.each do |user| | |
csv << [user.id, user.name] | |
end | |
csv << values | |
end | |
zos.print csv |
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======= Prolbem ================================================================================================================= | |
I have installed : ruby-2.0.0,postgres-9.2 , now in rails app when I execute: | |
rake db:create , command I get: | |
PG::InvalidParameterValue: ERROR: new encoding (UTF8) is incompatible with the encoding of the template database (SQL_ASCII) | |
HINT: Use the same encoding as in the template database, or use template0 as template. | |
: CREATE DATABASE "my_db_name" ENCODING = 'unicode'....... | |
bin/rake:16:in `load' |
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#!/usr/bin/env python3 | |
# Python screenshot tool (fullscreen/area selection) | |
# Special thanks to @tomk11, @frakman1, @aspotton and @lucguislain for the improvements | |
import sys | |
from PyQt5 import QtCore, QtGui | |
from PyQt5.QtGui import QPixmap, QScreen | |
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QSizePolicy | |
from PyQt5.QtWidgets import QGroupBox, QSpinBox, QCheckBox, QGridLayout | |
from PyQt5.QtWidgets import QPushButton, QHBoxLayout, QVBoxLayout |
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# config/initializers/omnicontacts.rb | |
Rails.application.middleware.use OmniContacts::Builder do | |
importer :live, 'client_id', 'client_secret', {redirect_path: "/invitations/live/contact_callback"} | |
end | |
class OmniContacts::Importer::Live < OmniContacts::Importer::Hotmail | |
def initialize *args | |
super *args |
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#!/usr/bin/env ruby | |
require 'csv' | |
require 'json' | |
if ARGV.size != 2 | |
puts 'Usage: csv_to_json input_file.csv output_file.json' | |
puts 'This script uses the first line of the csv file as the keys for the JSON properties of the objects' | |
exit(1) | |
end |