Chapters

26 Chapters | 2:53:08 |

01

Events, Events & Events!

5:10
02

Hooking into Symfony with an Event Subscriber

5:54
03

index.php to HttpKernel::handle()

6:50
04

RequestEvent & RouterListener

6:26
05

Routing Secrets & Request Attributes

7:47
06

The Controller Resolver

7:03
07

Who Creates the Controller & Gives it the Container?

8:04
08

How does the Controller Access the Container?

4:14
09

The Argument Resolver

8:13
10

Argument Value Resolvers

5:32
11

How Service Autowiring Works in a Controller Method

7:36
12

Calling the Controller & View Event

5:20
13

kernel.response Event & Request Format

6:36
14

Finishing the Request

6:03
15

Exception Handling

9:29
16

The Critical kernel.exception Event Listeners

7:07
17

FlattenException & Error Status Codes

6:10
18

Serializer Error Renderer: JSON/XML Errors

5:40
19

How the HTML Error Page is Rendered

7:34
20

The Magic `_controller` Attribute

6:36
21

Custom Global Controller Arguments

5:37
22

How Entity Controller Arguments Work

4:54
23

Sub Requests

7:54
24

Sub Requests & Request Data

5:40
25

Manually Making a Sub Request

6:34
26

Sub Request Attributes

9:05

> Symfony 5 > Symfony 5 Deep Dive! The HttpKernel Request-Response Flow

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15.

Exception Handling

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2 Comments

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Annemieke-B 3 years ago edited

Hi SymfonyCasts!

I have a question about error handling in repositories that have dbal queries.
An example of a query is this:

    ...
    use Doctrine\DBAL\Query\QueryBuilder;
    ...
    
    public function getPartDetails($partnumber): array
    {
        /** @var QueryBuilder $qb */
        $qb = $this->conn->createQueryBuilder();
        $qb->select(
            'altv_art_app_id',
            ...
  
        )
            ->from('dbtable')
            ->where('... = :partnumber')
            ->setParameter('partnumber', $partnumber);

        try {
            return $qb->fetchAssociative();
        } catch (Exception $e) {
            $this->logger->error($e->getMessage());
            return [];
        }

In this case we use a try-catch. But it is also possible to use a throw exception like this:

    ...
    use Doctrine\DBAL\Query\QueryBuilder;
    ...
    
    /**
     * @throws Exception
     */
    public function getPartDetails($partnumber)
    {
        /** @var QueryBuilder $qb */
        $qb = $this->conn->createQueryBuilder();
        $qb->select( ...

When we use the 'throw exception', we do a try catch in the controller that calls this function.
What is the best way to use?

Thanks in advance for the help!

Annemieke Buijs

|

MolloKhan SFCASTS Annemieke-B 3 years ago

Hey Annemieke,

I think it depends on your application. If you want to always log the error exception, then adding the try-catch block in the repository makes sense, but if there are situations where you actually want the exception to cause an error, then the caller should be the responsible of adding (or not) a try-catch block

Cheers!

|

This tutorial also works well for Symfony 6!

Symfony 5

What PHP libraries does this tutorial use?

// composer.json
{
    "require": {
        "php": ">=8.2",
        "ext-iconv": "*",
        "antishov/doctrine-extensions-bundle": "^1.4", // v1.4.3
        "aws/aws-sdk-php": "^3.87", // 3.133.20
        "composer/package-versions-deprecated": "^1.11", // 1.11.99
        "doctrine/annotations": "^1.0", // 1.12.1
        "doctrine/doctrine-bundle": "^2.0", // 2.2.3
        "doctrine/doctrine-migrations-bundle": "^1.3|^2.0", // 2.2.2
        "doctrine/orm": "^2.5.11", // 2.8.2
        "easycorp/easy-log-handler": "^1.0", // v1.0.9
        "http-interop/http-factory-guzzle": "^1.0", // 1.0.0
        "knplabs/knp-markdown-bundle": "^1.7", // 1.9.0
        "knplabs/knp-paginator-bundle": "^5.0", // v5.4.2
        "knplabs/knp-snappy-bundle": "^1.6", // v1.7.1
        "knplabs/knp-time-bundle": "^1.8", // v1.16.0
        "league/flysystem-aws-s3-v3": "^1.0", // 1.0.24
        "league/flysystem-cached-adapter": "^1.0", // 1.0.9
        "league/html-to-markdown": "^4.8", // 4.9.1
        "liip/imagine-bundle": "^2.1", // 2.5.0
        "oneup/flysystem-bundle": "^3.0", // 3.7.0
        "php-http/guzzle6-adapter": "^2.0", // v2.0.2
        "phpdocumentor/reflection-docblock": "^5.2", // 5.2.2
        "sensio/framework-extra-bundle": "^5.1", // v5.6.1
        "symfony/asset": "5.0.*", // v5.0.11
        "symfony/console": "5.0.*", // v5.0.11
        "symfony/dotenv": "5.0.*", // v5.0.11
        "symfony/flex": "^1.9", // v1.21.6
        "symfony/form": "5.0.*", // v5.0.11
        "symfony/framework-bundle": "5.0.*", // v5.0.11
        "symfony/mailer": "5.0.*", // v5.0.11
        "symfony/messenger": "5.0.*", // v5.0.11
        "symfony/monolog-bundle": "^3.5", // v3.6.0
        "symfony/property-access": "5.0.*|| 5.1.*", // v5.1.11
        "symfony/property-info": "5.0.*|| 5.1.*", // v5.1.10
        "symfony/routing": "5.1.*", // v5.1.11
        "symfony/security-bundle": "5.0.*", // v5.0.11
        "symfony/sendgrid-mailer": "5.0.*", // v5.0.11
        "symfony/serializer": "5.0.*|| 5.1.*", // v5.1.10
        "symfony/twig-bundle": "5.0.*", // v5.0.11
        "symfony/validator": "5.0.*", // v5.0.11
        "symfony/webpack-encore-bundle": "^1.4", // v1.11.1
        "symfony/yaml": "5.0.*", // v5.0.11
        "twig/cssinliner-extra": "^2.12", // v2.14.3
        "twig/extensions": "^1.5", // v1.5.4
        "twig/extra-bundle": "^2.12|^3.0", // v3.3.0
        "twig/inky-extra": "^2.12", // v2.14.3
        "twig/twig": "^2.12|^3.0" // v2.14.4
    },
    "require-dev": {
        "doctrine/doctrine-fixtures-bundle": "^3.0", // 3.4.0
        "fakerphp/faker": "^1.13", // v1.13.0
        "symfony/browser-kit": "5.0.*", // v5.0.11
        "symfony/debug-bundle": "5.0.*", // v5.0.11
        "symfony/maker-bundle": "^1.0", // v1.29.1
        "symfony/phpunit-bridge": "5.0.*", // v5.0.11
        "symfony/stopwatch": "^5.1", // v5.1.11
        "symfony/var-dumper": "5.0.*", // v5.0.11
        "symfony/web-profiler-bundle": "^5.0" // v5.0.11
    }
}

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