Relationship is created even whit invalid post ID - Meta Box

This topic has 1 reply, 2 voices, and was last updated 2 years, 8 months ago by Long Nguyen.

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April 27, 2022 at 3:13 AM #35805
Creditas Soluções Financeiras
Participant
Hello,

We have a code where we are creating the relationships between two objects, and we want the posts to be deleted if the relationship are not created due to the second object non existence.
```
private function create_relationship(String $yearId, String $modelId): bool {
    return \MB_Relationships_API::add($yearId, $modelId, 'yearModel', 1, 1);
}
```
However, this function returns true, even when we force an inexistent ID. Going to the WordPress interface we checked that the object does not have any object related on the select box of the relationship. We also tried to validate with the following code:
```
\MB_Relationships_API::has($modelId, $brandId, 'modelBrand');
```
Why does it happen? Is there a way we can be sure the relationship will not be created?

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April 28, 2022 at 12:25 PM #35813
Long Nguyen
Moderator
Hi,

I think you can check if the variable $modelId is not empty and then create the relationship.
```
private function create_relationship(String $yearId, String $modelId): bool {
    if( !empty( $modelId ) ) {
        return \MB_Relationships_API::add($yearId, $modelId, 'yearModel', 1, 1);
    }
    return false;
}
```
Or follow this topic to check if a post existed by ID https://stackoverflow.com/questions/9638375/check-existence-of-a-post-by-id-in-wordpress

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