Rails is difficult and painful! Ⅱ

I don't know the location of the file

First this! I had an analog mind, and I didn't know how the files of the app created by rails new were structured. It's all * alphabet *.

I wrote everything on paper. Yes, everything from app to README.md.

I think it looks like this at first. This time, let's check where the main files are located when creating the application that you want to understand first. Other than that, you will gradually understand it later, so don't rush.

** app ** at the top left of the image This is the body of the application.

app is an abbreviation for application. Of these, the first four you need are assets, controllers, models, and views. Each is a group of files that control page decoration, operations, data, and screen display.

assets

** Contains items related to page decoration. ** ** I think there are 4 folders in assets.

-** config : Contains Javascript settings, etc. - images : Put the images used for embedding etc. - javascripts : Contains the Javascript code. - stylesheets **: Contains CSS.

controllers

Contains various controllers that run the application.

-** application_controller : Exists from the beginning. It is a controller common to all applications. - Below **: This is a controller I created.

models

Contains various models that handle data. ――Basically I make everything myself.

views

Contains various HTML. The folder name matches the controller name. The users in this come from = users_controller.

Next is config. Contains various configuration files.

The first thing you want to know is routes.rb

routes.rb (roots)

Roots, that is, multiple routes. It's like a way to connect things that move apps, such as controllers and models.

Next is db. Contains various database related files.

What you need to know is migrate

migrate

It contains the database design.

Finally, Gemfile and Gemfile.lock.

These two are used when installing various functions in the application.

--Gemfile: A place to describe and store functions called gems (packaged like apps) --Gemfile.lock: It is regenerated every time you install a gem, and the information (version etc.) of the gem used in this application is displayed and fixed.

Summary

This time I organized the location of the files. The first thing I want to remember is only ** 8 **. Assets, controllers, models, views in the app routes.rb (roots) in config migrate in db And Gemfile and Gemfile.lock.

What role file is in which file? I think it will be much cleaner if it can be organized.