Notification channels (mail, database, SMS) in Laravel - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a notification channel in Laravel?

A notification channel in Laravel is a way to deliver notifications to users, such as email, database, or SMS. It defines how the notification is sent.

beginner

How do you send a notification via email in Laravel?

You create a notification class and use the 'mail' channel in the via() method. Laravel then sends the notification as an email using the mail configuration.

beginner

What does the database notification channel do?

The database channel stores the notification data in a database table. This allows users to view notifications inside the app without sending emails or SMS.

intermediate

How can SMS notifications be sent in Laravel?

SMS notifications are sent using the 'nexmo' or 'vonage' channel (or other SMS services). You configure the SMS service and use the SMS channel in the notification class.

beginner

What method defines which channels a Laravel notification will use?

The via() method inside the notification class returns an array of channels like ['mail', 'database', 'nexmo'] to specify how the notification is sent.

Which method in a Laravel notification class specifies the delivery channels?

A via()

B send()

C deliver()

D channels()

The via() method returns an array of channels to send the notification.

What does the database notification channel do?

A Sends an email

B Stores notification data in the database

C Sends an SMS

D Pushes a browser notification

The database channel saves notifications in the database for in-app display.

Which Laravel notification channel is used to send SMS messages?

A broadcast

B database

C mail

D nexmo or vonage

SMS messages are sent using the nexmo or vonage channel configured with an SMS provider.

How do you specify multiple notification channels in Laravel?

A Return a string with channels separated by commas in via()

B Call send() multiple times

C Return an array of channel names in via()

D Use multiple notification classes

You return an array of channel names like ['mail', 'database'] in the via() method.

What must you do before using the database notification channel?

A Run the notifications table migration

B Enable broadcasting

C Install an SMS provider

D Configure mail settings

You need to run the migration to create the notifications table for storing database notifications.

Explain how Laravel sends notifications using multiple channels like mail, database, and SMS.

Think about how you tell Laravel where to send the notification and what each channel does.

Describe the steps to set up and send a database notification in Laravel.

Focus on the database channel setup and how notifications are stored and accessed.

Practice

1. In Laravel notifications, which method defines the channels a notification will be sent through?

easy

A. via

B. send

C. channels

D. notify

Solution

1. Step 1: Understand the notification class structure

   Laravel notifications use a method to specify which channels to send the notification through.

2. Step 2: Identify the method name

   The method that returns an array of channels is named via.

3. Final Answer:

   via -> Option A

4. Quick Check:

   Channel selection method = via [OK]

Hint: Remember: 'via' means 'through' which fits channel selection [OK]

Common Mistakes:

• Confusing 'send' with 'via' method
• Using 'channels' instead of 'via'
• Assuming 'notify' defines channels

2. Which of the following is the correct syntax to specify the mail channel in the via method of a Laravel notification?

easy

A. return mail();

B. return 'mail';

C. return ['mail'];

D. return ['MailChannel'];

Solution

1. Step 1: Check the return type of the via method

   The via method must return an array of channel names as strings.

2. Step 2: Identify the correct array syntax

   Returning ['mail'] is correct; returning a string or function call is incorrect.

3. Final Answer:

   return ['mail']; -> Option C

4. Quick Check:

   Channel list must be an array of strings [OK]

Hint: Always return an array of channel names in via [OK]

Common Mistakes:

• Returning a string instead of an array
• Calling a function instead of returning array
• Using incorrect channel class names

3. Given this Laravel notification code snippet, what will be stored in the database when the notification is sent?

public function toDatabase($notifiable) {
    return [
        'invoice_id' => 1234,
        'amount' => 250
    ];
}

medium

A. Only the 'invoice_id' value 1234

B. An array with keys 'invoice_id' and 'amount' and their values

C. A JSON string of the notification class name

D. An error because toDatabase must return a string

Solution

1. Step 1: Understand the toDatabase method role

   The toDatabase method returns an array of data saved in the notifications table.

2. Step 2: Analyze the returned array

   The array contains keys 'invoice_id' and 'amount' with values 1234 and 250 respectively.

3. Final Answer:

   An array with keys 'invoice_id' and 'amount' and their values -> Option B

4. Quick Check:

   toDatabase returns array data saved in DB [OK]

Hint: toDatabase returns array data stored in notifications table [OK]

Common Mistakes:

• Expecting a string instead of array
• Thinking only one key is saved
• Confusing toMail with toDatabase

4. Identify the error in this Laravel notification class snippet for sending SMS via Nexmo:

public function via($notifiable) {
    return ['nexmo'];
}

public function toNexmo($notifiable) {
    return (new NexmoMessage)->content('Hello!');
}

medium

A. Method name should be toSms, not toNexmo

B. The content method is not valid for NexmoMessage

C. The via method should return 'sms' instead of 'nexmo'

D. NexmoMessage class is not imported or aliased

Solution

1. Step 1: Check method names and channel names

   Using 'nexmo' in via and method toNexmo is correct for SMS via Nexmo.

2. Step 2: Verify class usage

   The NexmoMessage class must be imported with use statement or aliased; missing import causes error.

3. Final Answer:

   NexmoMessage class is not imported or aliased -> Option D

4. Quick Check:

   Missing import causes class not found error [OK]

Hint: Always import notification channel classes before use [OK]

Common Mistakes:

• Renaming toNexmo incorrectly
• Returning wrong channel name in via
• Misusing content method on NexmoMessage

5. You want to send a Laravel notification via mail, database, and SMS (Nexmo). Which of the following via method implementations correctly sets all three channels?

hard

A. return ['mail', 'database', 'nexmo'];

B. return ['mail', 'database', 'sms'];

C. return ['MailChannel', 'DatabaseChannel', 'NexmoChannel'];

D. return ['mail', 'db', 'nexmo'];

Solution

1. Step 1: Recall correct channel names for Laravel notifications

   Laravel uses lowercase strings 'mail', 'database', and 'nexmo' to specify channels.

2. Step 2: Compare options for correct channel names

   return ['mail', 'database', 'nexmo']; uses correct channel names; others use incorrect or non-existent names.

3. Final Answer:

   return ['mail', 'database', 'nexmo']; -> Option A

4. Quick Check:

   Use exact channel strings in via array [OK]

Hint: Use exact lowercase channel names: mail, database, nexmo [OK]

Common Mistakes:

• Using 'sms' instead of 'nexmo'
• Using class names instead of strings
• Using shorthand like 'db' instead of 'database'