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Update serialization.md #1490

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Update serialization.md
jzabrodin Dec 13, 2021
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Merge branch 'api-platform:2.6' into patch-2
jzabrodin Dec 28, 2021
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Update core/serialization.md
jzabrodin Dec 28, 2021
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Update core/serialization.md
jzabrodin Dec 28, 2021
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Update serialization.md
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vincentchalamon Jul 20, 2022
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Merge branch '2.6' into patch-2
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Update core/serialization.md
jzabrodin Sep 8, 2022
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103 changes: 102 additions & 1 deletion core/serialization.md
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Expand Up @@ -11,7 +11,7 @@ The main serialization process has two stages:
![Serializer workflow](images/SerializerWorkflow.png)

> As you can see in the picture above, an array is used as a man-in-the-middle. This way, Encoders will only deal with turning specific formats into arrays and vice versa. The same way, Normalizers will deal with turning specific objects into arrays and vice versa.
-- [The Symfony documentation](https://symfony.com/doc/current/components/serializer.html)
> -- [The Symfony documentation](https://symfony.com/doc/current/components/serializer.html)

Unlike Symfony itself, API Platform leverages custom normalizers, its router and the [data provider](data-providers.md) system to perform an advanced transformation. Metadata are added to the generated document including links, type information, pagination data or available filters.

Expand Down Expand Up @@ -41,6 +41,107 @@ feature of the Symfony Serializer component.
In addition to groups, you can use any option supported by the Symfony Serializer. For example, you can use [`enable_max_depth`](https://symfony.com/doc/current/components/serializer.html#handling-serialization-depth)
to limit the serialization depth.

[codeSelector]

```php
<?php
// api/src/Entity/Book.php

namespace App\Entity;

use ApiPlatform\Core\Annotation\ApiResource;
use Symfony\Component\Serializer\Annotation\Groups;
use Symfony\Component\Serializer\Annotation\MaxDepth;
Comment on lines +52 to +54
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I would recommend to target 4.0 branch instead of 3.4, and update the imports as following:

Suggested change
use ApiPlatform\Core\Annotation\ApiResource;
use Symfony\Component\Serializer\Annotation\Groups;
use Symfony\Component\Serializer\Annotation\MaxDepth;
use ApiPlatform\Metadata\ApiResource;
use Symfony\Component\Serializer\Attribute\Groups;
use Symfony\Component\Serializer\Attribute\MaxDepth;


#[ApiResource(
normalizationContext: ['groups' => 'read', 'enable_max_depth' => true],
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Suggested change
normalizationContext: ['groups' => 'read', 'enable_max_depth' => true],
normalizationContext: ['groups' => ['read'], 'enable_max_depth' => true],

denormalizationContext: ['groups' => ['write']],
)]
class Book
{
#[Groups(["read", "write"])]
public $name;

#[Groups("write")]
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Suggested change
#[Groups("write")]
#[Groups(["write"])]

#[MaxDepth(1)]
public $author;

// ...
}
```

```yaml
# api/config/api_platform/resources.yaml
resources:
App\Entity\Book:
attributes:
normalization_context:
groups: ['read']
enable_max_depth: true
denormalization_context:
groups: ['write']

# api/config/serialization/Book.yaml
App\Entity\Book:
properties:
author:
groups: ['write']
max_depth: 1
```

```xml
<!-- api/config/api_platform/resources.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<resources xmlns="https://api-platform.com/schema/metadata/resources-3.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="https://api-platform.com/schema/metadata/resources-3.0
https://api-platform.com/schema/metadata/resources-3.0.xsd">
<resource class="App\Entity\Book">
<normalizationContext>
<values>
<value name="groups">
<values>
<value>read</value>
</values>
</value>
<value name="enable_max_depth">
<values>
<value>true</value>
</values>
</value>
</values>
</normalizationContext>
<denormalizationContext>
<values>
<value name="groups">
<values>
<value>write</value>
</values>
</value>
</values>
</denormalizationContext>
</resource>
</resources>


<!-- api/config/serialization/Book.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<serializer xmlns="http://symfony.com/schema/dic/serializer-mapping"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/serializer-mapping
http://symfony.com/schema/dic/serializer-mapping/serializer-mapping-1.0.xsd">
<class name="App\Entity\Book">
<attribute name="author">
<group>write</group>
<max_depth>1</max_depth>
</attribute>
</class>
</serializer>
```

[/codeSelector]


### Configuration

Just like other Symfony and API Platform components, the Serializer component can be configured using annotations, XML
Expand Down