Gain insights into Ruby on Rails fundamentals, creating projects, deploying, CRUD operations, user authentication, and session management. Build foundational skills to develop complex applications.

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In this course, you will learn the fundamentals of Ruby on Rails to build your own application.

You will start by learning how to create a new project, deploy to a Rails server, and the Rails design pattern. After that, you’ll learn how to perform CRUD operations, handle user authentication, and manage sessions.

Once you finish this course, you’ll have the foundations in place to build more complex applications to add to your portfolio.

Introduction to Ruby on Rails

## Create
In the previous lesson, you created a model named `Pet` and used the `create_table` method to create the `pets` table for this model with attributes *name* and *age*. Active Record provides you with two methods to set values for these attributes. These commands will be executed inside the *rails console* for now. In later lessons, you will learn to make updates to the database using web forms.

You can enter the *rails console* by using the command:
```
rails c
```

### new
The first method is by using the `new` command. This command instantiates a new object without saving it into the database. You can set the values for each attribute in separate commands.


pet = Pet.new
pet.name = "max"
pet.age = "1"
pet.save

- **Line 1:** Instantiates a new `Pet` record called `pet`. All attributes for `pet` are initialized to `nil` (unless a default value is specified for an attribute).
- **Line 2-3:** Sets the values for `name` to "max", and `age` to "1" for the newly created `pet`.
- **Line 4:** `new` only instantiates a `Pet` record, running the `save` command will commit this record into the database.

Alternatively, you can use: 
```
pet = Pet.new(name: 'max', age: '1')
``` 
This achieves the result of lines 1-3.

### create
The second method is by using the `create` command. When using the `create` command, the record is saved into the database without needing to call the `save` method.
```
pet = Pet.create(name: 'max', age: '1')
```

<br>

An easier way to add entries to your database is through the `db/seeds.rb` file.

Add the following entries into `db/seeds.rb`:
```
Pet.create(name: 'max', age: '1')
Pet.create(name: 'Nala', age: '4')
Pet.create(name: 'Simba', age: '4')
Pet.create(name: 'Leroy', age: '3')
Pet.create(name: 'Jenkins', age: '2')
```


# Create
In the previous lesson, you created a model named `Pet` and used the `create_table` method to create the `pets` table for this model with attributes *name* and *age*. Active Record provides you with two methods to set values for these attributes. These commands will be executed inside the *rails console* for now. In later lessons, you will learn to make updates to the database using web forms.

You can enter the *rails console* by using the command:
```
rails c
```

## new
The first method is by using the `new` command. This command instantiates a new object without saving it into the database. You can set the values for each attribute in separate commands.


- **Line 1:** Instantiates a new `Pet` record called `pet`. All attributes for `pet` are initialized to `nil` (unless a default value is specified for an attribute).
- **Line 2-3:** Sets the values for `name` to "max", and `age` to "1" for the newly created `pet`.
- **Line 4:** `new` only instantiates a `Pet` record, running the `save` command will commit this record into the database.

Alternatively, you can use: 
```
pet = Pet.new(name: 'max', age: '1')
``` 
This achieves the result of lines 1-3.

## create
The second method is by using the `create` command. When using the `create` command, the record is saved into the database without needing to call the `save` method.
```
pet = Pet.create(name: 'max', age: '1')
```

<br>

An easier way to add entries to your database is through the `db/seeds.rb` file.

Add the following entries into `db/seeds.rb`:
```
Pet.create(name: 'max', age: '1')
Pet.create(name: 'Nala', age: '4')
Pet.create(name: 'Simba', age: '4')
Pet.create(name: 'Leroy', age: '3')
Pet.create(name: 'Jenkins', age: '2')
```


Learn to perform the create and read operations on Rails models.

Introduction to Ruby on Rails

CRUD on Rails

Your First Rails Application!

Comments

Create a Bill Split Application Using Ruby on Rails

Testing

Conclusion

Create and Read

Create

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