Not able to get data through API...!

Question

Error is "message": "Internal Error. Details are available in Magento log file. Report ID: webapi-5dee36e254394".

When you run http://localhost:8888/magento/rest/V1/position/1

Need to get result from "position" column.

Api is for retrieving a column field by given user input.

<?php
 namespace SimpleMagento\Custom\Model;

use SimpleMagento\Custom\Api\InfoLinkInterface;
use SimpleMagento\Custom\Model\ResourceModel\Info\CollectionFactory; //Collection file
use SimpleMagento\Custom\Model\InfoFactory; //Implemented getter setter model

class InfoLink implements InfoLinkInterface
{
   private $collection;
   private $infoFactory;
   public function __construct(CollectionFactory $collection,InfoFactory $infoFactory)
{
    $this->collection=$collection;
    $this->infoFactory=$infoFactory;
} 
/**
 * @param int $id
 * @return \SimpleMagento\Custom\Api\Data\InfoInterface[]
 */

public function getInfo($id)
{

    return $this->infoFactory->create()->getCollection()->addFieldToFilter('entity_id',$id)->getData();
    //return $this->infoFactory->create()->getData('position')->addFieldToFilter('entity_id',1);

}
 }

?>

webapi.xml is

<routes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Webapi:etc/webapi.xsd">

<route url="/V1/position/:id" method="GET">
    <service class="SimpleMagento\Custom\Api\InfoLinkInterface" method="getInfo"/>
    <resources>
        <resource ref="anonymous" />
    </resources>
</route>

Answer 1

It seems like you added wrong model file class name in your di.xml file :

Change from :

SimpleMganeto\Custom\Model\InfoLink

To :

SimpleMagento\Custom\Model\InfoLink

Answer 2

Try to replace this line

return $this->infoFactory->create()->getCollection()->addFieldToFilter('entity_id',$id)->getData();

With this one

return $this->infoFactory->create()->getCollection()->addFieldToFilter('entity_id',array('eq', $id))->getFirstItem()->getPosition();

Follow this link for reference.

Hope this will help you!