Count ¶
Validates that a given collection's (i.e. an array or an object that implements Countable) element count is between some minimum and maximum value.
| Applies to | property or method |
| Class | Count |
| Validator | CountValidator |
Basic Usage ¶
To verify that the emails array field contains between 1 and 5 elements
you might add the following:
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Attributes
属性
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YAML
YAML
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XML
XML
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PHP
PHP
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
// src/Entity/Participant.php
namespace App\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Participant
{
#[Assert\Count(
min: 1,
max: 5,
minMessage: 'You must specify at least one email',
maxMessage: 'You cannot specify more than {{ limit }} emails',
)]
protected $emails = [];
}
|
Options ¶
divisibleBy
¶
type: integer default: null
Validates that the number of elements of the given collection is divisible by a certain number.
See also
If you need to validate that other types of data different from collections are divisible by a certain number, use the DivisibleBy constraint.
divisibleByMessage
¶
type: string default: The number of elements in this collection should be a multiple of {{ compared_value }}.
The message that will be shown if the number of elements of the given collection
is not divisible by the number defined in the divisibleBy option.
You can use the following parameters in this message:
| Parameter | Description |
|---|---|
{{ compared_value }} |
The number configured in the divisibleBy option |
exactMessage
¶
type: string default: This collection should contain exactly {{ limit }} elements.
The message that will be shown if min and max values are equal and the underlying collection elements count is not exactly this value.
You can use the following parameters in this message:
| Parameter | Description |
|---|---|
{{ count }} |
The current collection size |
{{ limit }} |
The exact expected collection size |
groups
¶
type: array | string
It defines the validation group or groups of this constraint. Read more about validation groups.
max
¶
type: integer
This option is the "max" count value. Validation will fail if the given collection elements count is greater than this max value.
This option is required when the min option is not defined.
maxMessage
¶
type: string default: This collection should contain {{ limit }} elements or less.
The message that will be shown if the underlying collection elements count is more than the max option.
You can use the following parameters in this message:
| Parameter | Description |
|---|---|
{{ count }} |
The current collection size |
{{ limit }} |
The upper limit |
min
¶
type: integer
This option is the "min" count value. Validation will fail if the given collection elements count is less than this min value.
This option is required when the max option is not defined.
minMessage
¶
type: string default: This collection should contain {{ limit }} elements or more.
The message that will be shown if the underlying collection elements count is less than the min option.
You can use the following parameters in this message:
| Parameter | Description |
|---|---|
{{ count }} |
The current collection size |
{{ limit }} |
The lower limit |
payload
¶
type: mixed default: null
This option can be used to attach arbitrary domain-specific data to a constraint. The configured payload is not used by the Validator component, but its processing is completely up to you.
For example, you may want to use several error levels to present failed constraints differently in the front-end depending on the severity of the error.