DEVELOPER NOTE

Note for developer. Haha just kidding. This is a note that records some of the setup process or technical issues faced during the development of this project.

Environment Setup

A note of how I setup my environment for Ruby and Rails inside WSL.

Setup `nvm` on wsl

Following microsoft docs

Setup `rvm` on wsl

Following rvm github

Extra learning

Ruby data structure

arrays & ranges
hashes & symbols
block
Instance variable vs local variable vs class variable

Testing

Article about red, green, & refactor
ActiveSupport::Testing::Assertions, there are many assertions example here.

Partials

Example, the _file.html.erb with underscore at front is the convention of defining partials. Partials is like a snippet of code that could be inserted into other html.erb codes.

has_secure_password

password digest, aka, hashed password.

Fixture

Fixtures are a way of organizing data for testing. ActiveRecord::Fixtures

Attribute accessor

Basically a shortcut for instance variable functionality. Learn more about attr_accessor

What is Action Dispatch

Basically, rails consists of 3 Action Packs

Action Dispatch routes request to controllers
Action Controller converts requests into responses
Action View is used by Action Controller to format those reponse

Learn more in this blog

Ruby keywords

Raise an exception
debugger to debug

What does `<<` mean in Ruby?

Basically add to the end of this array, see also this stackoverflow or this ruby doc

HTML

<strong> tag shows the text with strong importance and it's usually bold

Other topics

Some other troubles I got into, haih...

Reset password on WSL

Long story short.. change to root user and chpsswd for liew user, then relogin back.

View a file in WSL

wslview filename.pdf

Unable to donwgrade yarn

Checkout this github issue

Don't run bundler as root

Explained in stackoverflow.

Package directory not part of the project

Received a warning messsage: "The nearest package directory doesn't seem to be part of the project". Turns out it is because there's a yarn.lock (or package.json) file higher up in the filetree, see this github issue

Unable to host in heroku

Heroku bundle version

Heroku yarn version

No matching yarn versin
Additionally, to change yarn version, somehow I need to delete .yarnrc file, shown in stackoverflow.

rails console stop working when used Ctrl + c

Use $ bin/spring stop , stackoverflow

SQLite3 Locked

Error: ActiveRecord :: StatementInvalid: SQLite3 :: BusyException: database is locked, tried all methods listed here. However, the one that only works is ... restarting my computer...