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[TypeInfo] Add ArrayShapeType examples to type_info.rst #20998

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@makraz makraz commented May 25, 2025

Fixes #20763

Update the Symfony TypeInfo component documentation to reflect the new ArrayShapeType and StringTypeResolver capabilities .

@OskarStark
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Friendly ping @mtarld

Comment on lines +107 to +108
* Nested array shapes
* Union types for values
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I don't think it worth mentioning these, as array shape basically supports any type as values.

* Required and optional keys
* Nested array shapes
* Union types for values
* Exact key ordering validation
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This type does not perform any key ordering validation.


The ``ArrayShapeType`` method was introduced in Symfony 7.3.

Array shape types support:
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You can also add a word about the "sealed" concept.
Indeed, array{0: int} is sealed whereas array{0: int, ...} is not. This means that the second type accepts extra values and the first does not. It is also worth mentioning that you can define the type of extra keys/values: array{0: int, ...<string, bool>}.

This data is held by extraKeyType and extraValueType in the ArrayShapeType and is validated in the accept method.

Comment on lines +121 to +125
// With optional keys (denoted by "?" suffix)
$type = Type::arrayShape([
'required_id' => Type::int(),
'optional_name?' => Type::string()
]);
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This does not work like that. If you want to create optional keys, you must do:

$type = Type::arrayShape([
    'required_id' => Type::int(),
    'optional_name' => ['type' => Type::string(), 'optional' => true],
]);

Comment on lines +121 to +125
// With optional keys (denoted by "?" suffix)
$type = Type::arrayShape([
'required_id' => Type::int(),
'optional_name?' => Type::string()
]);
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You can also add examples for $sealed, $extraKeyType, and $extraValueType of:

    public static function arrayShape(array $shape, bool $sealed = true, ?Type $extraKeyType = null, ?Type $extraValueType = null): ArrayShapeType

* Union types for values
* Exact key ordering validation

The ArrayShapeType support Associative Array definition::
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Suggested change
The ArrayShapeType support Associative Array definition::
The ArrayShapeType supports associative array definition:

Comment on lines +142 to +143
$type->is(typeof(['name' => 'Alice', 'age' => 30, ])); // true
$type->is(typeof(['name' => 'Alice', 'age' => '30', ])); // false (wrong age type)
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This code does not work as well. The valid one is:

$type->accepts(['name' => 'Alice', 'age' => 30]); // true
$type->accepts(['name' => 'Alice', 'age' => '30']); // false (invalid age type)

Plus, I don't think it should be under the StringTypeResolver section.

@makraz
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makraz commented May 26, 2025

thanks @mtarld for the feedback, I will adjust the PR with following your comment 🙌🏼

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[TypeInfo] Add ArrayShapeType class
4 participants