A (more) complete cheatsheet for Arel, including NamedFunction functions, raw SQL and window functions.
posts = Arel::Table.new(:posts)
posts = Post.arel_table # ActiveRecord
# Temary | |
# ------------------------ | |
# Explain about how works: | |
# > class method self ✅ | |
# > method_missing ✅ | |
# > blocks as parameter ✅ | |
# > instance_eval ✅ | |
# What are we going to build? |
ruby '2.7.1' | |
gem 'rails', github: 'rails/rails' | |
gem 'tzinfo-data', '>= 1.2016.7' # Don't rely on OSX/Linux timezone data | |
# Action Text | |
gem 'actiontext', github: 'basecamp/actiontext', ref: 'okra' | |
gem 'okra', github: 'basecamp/okra' | |
# Drivers |
2019 update: this essay has been updated on my personal site, together with a followup on how to get started
2020 update: I'm now writing a book with updated versions of all these essays and 35 other chapters!!!!
If there's a golden rule, it's this one, so I put it first. All the other rules are more or less elaborations of this rule #1.
You already know that you will never be done learning. But most people "learn in private", and lurk. They consume content without creating any themselves. Again, that's fine, but we're here to talk about being in the top quintile. What you do here is to have a habit of creating learning exhaust. Write blogs and tutorials and cheatsheets. Speak at meetups and conferences. Ask and answer things on Stackoverflow or Reddit. (Avoid the walled gardens like Slack and Discourse, they're not public). Make Youtube videos
import React from "react"; | |
import { | |
LayoutChangeEvent, | |
PanResponder, | |
PanResponderGestureState | |
} from "react-native"; | |
import styled from "styled-components"; | |
type StateType = { | |
barHeight: number | null, |
The goal of this cheatsheet is to make it easy to add hand-rolled authentication to any rails app in a series of layers.
First the simplest/core layers, then optional layers depending on which features/functionality you want.
Specs |
|
---|---|
AUTHOR | Ira Herman |
LANGUAGE/STACK | Ruby on Rails Version 4, 5, or 6 |
type below:
brew update
brew install redis
To have launchd start redis now and restart at login:
brew services start redis
class="[a-zA-Z0-9:;\.\s\(\)\-\,]*" |
By default, Rails applications build URLs based on the primary key -- the id
column from the database. Imagine we have a Person
model and associated controller. We have a person record for Bob Martin
that has id
number 6
. The URL for his show page would be:
/people/6
But, for aesthetic or SEO purposes, we want Bob's name in the URL. The last segment, the 6
here, is called the "slug". Let's look at a few ways to implement better slugs.