philsof

Migration table naming convention: groups_users

Migration file naming convention (the part of the file name that is not automatically generated): create_groups_users

Model class naming convention: GroupsUser

zulhfreelancer

It's important to note that running this reset will drop any existing data you have in the application

How to reset PG Database on Heroku?

• Step 1: heroku restart
• Step 2: heroku pg:reset DATABASE (no need to change the DATABASE)
• Step 3: heroku run rake db:migrate
• Step 4: heroku run rake db:seed (if you have seed)

One liner

ntamvl

Controller Concerns in Rails 4

If you setup a Rails 4 app, you’ll notice the app/models/concerns and app/controllers/concerns directories. Concerns are modules that can be mixed into your models and controllers to share code between them.

Some developers falsely classify mixins as composition when they are actually a form of inheritance. When you include a module in a class, that module’s methods are added to the inheritance chain just like a parent class’ methods are added to a subclass. So, don’t think you’ve solved the problem of inheritance by simply splitting your inherited code into separate files!

That being said, mixins can be a valuable tool to share code between classes that are otherwise unrelated. Here’s an example of how I chose to use it recently.

I am adding admin reporting features to an app I’m hoping to launch soon. I have an admin controller with a simple before filter to redirect if the current user is not an administrator.

class AdminController < ApplicationController

tomysmile

type below:

brew update
brew install redis

To have launchd start redis now and restart at login:

brew services start redis

AtulKsol

psql: FATAL: Peer authentication failed for user “postgres” (or any user)

The connection failed because by default psql connects over UNIX sockets using peer authentication, that requires the current UNIX user to have the same user name as psql. So you will have to create the UNIX user postgres and then login as postgres or use sudo -u postgres psql database-name for accessing the database (and psql should not ask for a password).

If you cannot or do not want to create the UNIX user, like if you just want to connect to your database for ad hoc queries, forcing a socket connection using psql --host=localhost --dbname=database-name --username=postgres (as pointed out by @meyerson answer) will solve your immediate problem.

But if you intend to force password authentication over Unix sockets instead of the peer method, try changing the following pg_hba.conf* line:

from

mankind

http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

#payload: [{"kind"=>"person"}]
Segment.where("payload @> ?", [{kind: "person"}].to_json)

#data: {"interest"=>["music", "movies", "programming"]}
Segment.where("data @> ?",  {"interest": ["music", "movies", "programming"]}.to_json)
Segment.where("data #>> '{interest, 1}' = 'movies' ")
Segment.where("jsonb_array_length(data->'interest') > 1")

juanarbol

Chmod codes cheat sheet

How to use chmod codes in UNIX:

1. There are three types of permissions in files and folders in unix
   1. Read (r)
   2. Write (w)
   3. Execute (x)
2. And, there is a classification of users called UGO (explained bellow):
3. U ~> User (usually, you)

mrmartineau

Stimulus cheatsheet

• Website: https://stimulusjs.org/
• GitHub repo: https://github.com/stimulusjs/stimulus
• Handbook: https://stimulusjs.org/handbook/introduction
• Discourse: https://discourse.stimulusjs.org/

Lifecycle callbacks

• initialize: once, when the controller is first instantiated
• connect: anytime the controller is connected to the DOM

zthxxx

Note

For every body who using Win10/11 with new Office that you need to know:

to active Office without crack, just follow https://github.com/WindowsAddict/IDM-Activation-Script,

you wiil only need to run

irm https://massgrave.dev/ias | iex

scmx

7 Patterns to Refactor Rails Models 7 years later

You may have read the following excellent blogpost by Brian Helmkamp of CodeClimate. It nicely describes 7 types of objects that can be extracted from models and controllers in a Rails-app.

7 Patterns to Refactor Fat ActiveRecord Models https://codeclimate.com/blog/7-ways-to-decompose-fat-activerecord-models/ Brian Helmkamp on Oct 17, 2012.

Here are my thoughts on it, reading it as an experienced rails developer, 7 years later 😅 👴