Check if the relationship panel is populated from Javascript.

[AgentT]

How do I check if a relationship panel is populated for an entity from JS to have some front end validations.

I have an entity A with a relationship of 1:M with another entity B. And I have the relationship panel which shows the B entities that are linked to A under the detail view of entity A. I need a way to check if there are any B entities linked to A, so that I can enable/disable a certain button.

How do I go about this using Javascript?

Thank you! Cheers!
@telecastg

[dimyy]

Variant:

Make not storable field (entityDefs)

 "haveWinQuote": {
"type": "bool",
"readOnly": true,
"notStorable": true
},
"haveHarmonizationQuote": {
"type": "bool",
"readOnly": true,
"notStorable": true
},

and code like this

namespace Espo\Custom\Services;

use \Espo\ORM\Entity;

class Opportunity extends \Espo\Modules\Sales\Services\Opportunity
{

public function loadAdditionalFields(Entity $entity)
{
parent::loadAdditionalFields($entity);

$winQuote = $this->getEntityManager()->getRepository('Quote')->where([
'opportunityId' => $entity->id,
'status' => 'Won'
])->findOne();

$entity->set('haveWinQuote', !empty($winQuote));

$harmonizationQuote = $this->getEntityManager()->getRepository('Quote')->where([
'opportunityId' => $entity->id,
'status' => 'In Review'
])->findOne();

$entity->set('haveHarmonizationQuote', !empty($harmonizationQuote));

}


} 

[AgentT]

This is cool!
Thanks.

[dimyy]

Another way, mark many fields in relation def, and then control accordingly field

Example: opportunity-city, field cities

In entity model you have citiesIds, citiesNames