In this week we will get started with Rails.
At first, we will create a simple rails app with two pages, a Home Page and an About Me page.
Follow these instructions to get started.
We take a closer look at Model of the MVC architecture and talk about databases, migrations and working with records.
The model layer is responsible for storing and processing data.
We store data in a relational database and process it in the
app/models of the Rails application.
A relational database stores information as a set of tables with columns and rows (records). The tables and their columns are together called a schema. You can think of relational database as a spreadsheet with each table on a different sheet.
There are other non-tabular databases as well, which are better suited to specific problems: What is a Database | Oracle
Structured Query Language (SQL) is used to access and manipulate databases. SQL can retrieve, create, read, update and destroy records, modify schema and more. Working with SQL directly is difficult, so we usually have a Rails equivalent.
The assignment is split into different sub-tasks, each testing a different aspect of Model layer.
We will be using SQLite as our database program, as it requires no setup and is Rails's default.
Relational databases stores information using tables. You can think of tables and their columns as the format in which data is stored.
In this sub-task, we will build an activity tracker because as programmers we spend long hours sitting and need to keep track of our health. During the course of this bootcamp, we'll build the entire application, adding functionality each week. At the end, you'll have a fully functional acticity tracker!
Head over to activity-tracker to learn more.
Once a table is created, we have to fill it with actual data. In particular, we can create, read, update and destroy records in a table. Each operation maps to a different SQL command and a different Rails equivalent.
In this sub-task, we will work on some statistics from Football!
Head over to football directory to learn more.
The Rails console is useful for testing out quick ideas with code and debugging applications.
rails consoleThis should open a console, similar to IRB in the first session. We can access your model functions and execute any valid ruby code.