39 lines
1.0 KiB
Markdown
39 lines
1.0 KiB
Markdown
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## public Election::addConstraint
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### Description
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```php
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public Election->addConstraint ( string $constraintClass ): bool
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```
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Add a constraint rules as a valid class path.
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##### **constraintClass:** *```string```*
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A valid class path. Class must extend VoteConstraint class.
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### Return value:
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*(```bool```)* True on success.
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### Throws:
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* ```CondorcetPHP\Condorcet\Throwable\VoteConstraintException```
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---------------------------------------
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### Related method(s)
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* [Election::getConstraints](../Election%20Class/public%20Election--getConstraints.md)
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* [Election::clearConstraints](../Election%20Class/public%20Election--clearConstraints.md)
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* [Election::testIfVoteIsValidUnderElectionConstraints](../Election%20Class/public%20Election--testIfVoteIsValidUnderElectionConstraints.md)
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---------------------------------------
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### Examples and explanation
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* **[Manual - Vote Constraints](https://github.com/julien-boudry/Condorcet/wiki/II-%23-C.-Result-%23-5.-Vote-Constraints)**
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