How to retrieve custom attribute set ID by name

Based on Rizwan Dhuka answer, you can:

• reduce response size with select 'attribute_set_id' instead of '*'

• avoid a loop on the object with combine getFirstItem and toArray methods

  namespace Nolwennig\CustomCatalog;
  
  use \Magento\Eav\Model\ResourceModel\Entity\Attribute\Set\CollectionFactory;
  
  class CustomProduct
  {
  
    protected $_attributeSetCollection;
  
    /**
     *
     * ...
     * @param AttributeSetCollectionFactory $attributeSetCollection
     */
    public function __construct(..., CollectionFactory $attributeSetCollection)
    {
      ...
      $this->_attributeSetCollection = $attributeSetCollection;
    }
  
    /**
     *
     * @param string $attributeSetName
     * @return int attributeSetId
     */
    public function getAttributeSetId($attributeSetName)
    {
      $attributeSetCollection = $this->_attributeSetCollection->create()
        ->addFieldToSelect('attribute_set_id')
        ->addFieldToFilter('attribute_set_name', $attributeSetName)
        ->getFirstItem()
        ->toArray();
  
      $attributeSetId = (int) $attributeSetCollection['attribute_set_id'];
      // OR (see benchmark below for make your choice)
      $attributeSetId = (int) implode($attributeSetCollection);
  
      return $attributeSetId
    }
  }
  

---

Quick (n' dirty?) benchmarks

• $attributeSetId = (int) implode($attributeSetCollection);

  .------------------------------------------------------------. 
  | Version   | System time (s) | User time (s) | Memory (MiB) |
  |-----------+-----------------+---------------+--------------|
  |    7.2    |      0.035      |     0.012     |     17.96    |
  |    7.1    |      0.050      |     0.012     |     20.98    |
  |    hhvm   |      0.088      |     0.234     |     88.93    |
  |    5.6    |      0.017      |     0.061     |     20.59    |
  '------------------------------------------------------------'
  

  source: 3v4l.org/uRTNh

---

• $attributeSetId = $attributeSetCollection['attribute_set_id'];

  .------------------------------------------------------------. 
  | Version   | System time (s) | User time (s) | Memory (MiB) |
  |-----------+-----------------+---------------+--------------|
  |    7.2    |      0.128      |     0.011     |     17.55    | 
  |    7.1    |      0.131      |     0.011     |     20.86    | 
  |    hhvm   |      0.100      |     0.204     |     88.75    | 
  |    5.6    |      0.017      |     0.060     |     20.64    | 
  '------------------------------------------------------------'
  

source: 3v4l.org/8Yq6j

You can retrieve attribute set ID by using following code:

protected $_attributeSetCollection;

public function __construct(
     ...
     ,\Magento\Eav\Model\ResourceModel\Entity\Attribute\Set\CollectionFactory $attributeSetCollection
)
    {
        ...
        $this->_attributeSetCollection = $attributeSetCollection;
    }


public function getAttrSetId($attrSetName)
    {
        $attributeSet = $this->_attributeSetCollection->create()->addFieldToSelect(
                    '*'
                    )->addFieldToFilter(
                            'attribute_set_name',
                            $attrSetName
                    );
        $attributeSetId = 0;
        foreach($attributeSet as $attr):
            $attributeSetId = $attr->getAttributeSetId();
        endforeach;
        return $attributeSetId;
    }

You can call getAttrSetId method by passing the attribute set name for which you want to retrieve attribute set ID. eg. $this->getAttrSetId("YourAttributeSetName");