src/ImportCsvContentHandler.php
public function getElement($fieldName, $uniqueValue, $contentId = null)
    {
        $element = null;

        if (!$contentId)
        {
            $contentId = $this->content_id;
        }

        if (strpos("field_" . $fieldName, 'element.'))
        {
            $realName = str_replace("element.", "", $fieldName);
            $element = CmsContentElement::find()->where([$realName => $uniqueValue])->one();

        } else if (strpos("field_" . $fieldName, 'property.'))
        {
            $realName = str_replace("property.", "", $fieldName);

            /**
             * @var $property CmsContentProperty
             */
            $property = CmsContentProperty::find()->where(['code' => $realName])->one();
            $query = CmsContentElement::find();
            CmsContentElement::filterByProperty($query, $property, $uniqueValue);

            //print_r($query->createCommand()->rawSql);die;
            $element = $query->one();
        }

        return $element;
    }
public function getElement($fieldName, $uniqueValue, $contentId = null)
    {
        $element = null;

        if (!$contentId)
        {
            $contentId = $this->content_id;
        }

        if (strpos("field_" . $fieldName, 'element.'))
        {
            $realName = str_replace("element.", "", $fieldName);
            $element = CmsContentElement::find()->where([$realName => $uniqueValue])->one();

        } else if (strpos("field_" . $fieldName, 'property.'))
        {
            $realName = str_replace("property.", "", $fieldName);

            /**
             * @var $property CmsContentProperty
             */
            $property = CmsContentProperty::find()->where(['code' => $realName])->one();
            $query = CmsContentElement::find();
            CmsContentElement::filterByProperty($query, $property, $uniqueValue);

            //print_r($query->createCommand()->rawSql);die;
            $element = $query->one();
        }

        return $element;
    }
@param $fieldName
@param $uniqueValue
@param null $contentId

@return array|null|\yii\db\ActiveRecord