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

working4.tar.gz

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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

Now that you know how to create and retrieve Active Record objects, you can learn how to make modifications to them.

Currently, your database looks like this:

> **Note:** We omit the `created_at` and `updated_at` attributes since they are managed internally by Rails/ Active Record.

<br>

## Update
You will notice that you have capitalized the names for all pets except the pet with the name "max". You can rectify this mistake by first retrieving the specified record, and then making the necessary changes.

You will run the following commands in the rails console:
```
#### find the pet with the attribute name='max'
pet = Pet.find_by(name: 'max')

## update the name attribute
pet.name = 'Max'

## commit the updated changes
pet.save
```

Alternatively, you can do the same thing by using shorthand to map the desired attribute to the new value.
```
# find the pet with the attribute name='max'
pet = Pet.find_by(name: 'max')

### update and commit the changes
pet.update(name: 'Max')
```
Although it may seem like the shorthand only saves you one line, you can also change multiple attributes at once. 
```
pet.update(name: 'Max', age: '3')
```

> **Note:** We have used `string` as our column type for `age`. For `int` type columns the quotations will be omitted.
`pet.update(text_attribute: 'newValue', int_attribute: 2)`. 

> **Note:** We omit the `created_at` and `updated_at` attributes since they are managed internally by Rails/ Active Record.

<br>

# Update
You will notice that you have capitalized the names for all pets except the pet with the name "max". You can rectify this mistake by first retrieving the specified record, and then making the necessary changes.

You will run the following commands in the rails console:
```
#### find the pet with the attribute name='max'
pet = Pet.find_by(name: 'max')

## update the name attribute
pet.name = 'Max'

## commit the updated changes
pet.save
```

Alternatively, you can do the same thing by using shorthand to map the desired attribute to the new value.
```
# find the pet with the attribute name='max'
pet = Pet.find_by(name: 'max')

### update and commit the changes
pet.update(name: 'Max')
```
Although it may seem like the shorthand only saves you one line, you can also change multiple attributes at once. 
```
pet.update(name: 'Max', age: '3')
```

> **Note:** We have used `string` as our column type for `age`. For `int` type columns the quotations will be omitted.
`pet.update(text_attribute: 'newValue', int_attribute: 2)`. 

Introduction to Ruby on Rails

CRUD on Rails

Your First Rails Application!

Comments

Create a Bill Split Application Using Ruby on Rails

Testing

Conclusion

Update and Delete

Update