SQL Error - Unknown column 'LinkType' in 'where clause'

[extravio]

In the CMS, the "link existing" ajax call triggers the following error:

ERROR [Emergency]: Uncaught SilverStripe\ORM\Connect\DatabaseException: Couldn't run query:

SELECT DISTINCT "LinkableLink"."ClassName", "LinkableLink"."LastEdited", "LinkableLink"."Created", "LinkableLink"."Anchor", "LinkableLink"."Title", "LinkableLink"."Type", "LinkableLink"."URL", "LinkableLink"."Email", "LinkableLink"."Phone", "LinkableLink"."OpenInNewWindow", "LinkableLink"."Template", "LinkableLink"."SiteTreeID", "LinkableLink"."FileID", "LinkableLink"."ID", 
			CASE WHEN "LinkableLink"."ClassName" IS NOT NULL THEN "LinkableLink"."ClassName"
			ELSE 'Sheadawson\\Linkable\\Models\\Link' END AS "RecordClassName"

FROM "LinkableLink"

WHERE ("LinkableLink"."ID" NOT IN 
SELECT DISTINCT "LinkableLink"."ID"

FROM "LinkableLink"
INNER JOIN "ContactUsPage_LinkedPages" ON "ContactUsPage_LinkedPages"."LinkableLinkID" = "LinkableLink"."ID"

WHERE ("ContactUsPage_LinkedPages"."ContactUsPageID" = ?)))
 AND (("LinkableLink"."Title" LIKE ?)
 OR ("LinkType" LIKE ?)
 OR ("LinkURL" LIKE ?))

ORDER BY "LinkableLink"."Title" ASC

LIMIT 20

Unknown column 'LinkType' in 'where clause'
IN GET /admin/pages/edit/EditForm/7/field/LinkedPages/search?gridfield_relationsearch=test
Line 64 in /var/www/html/vendor/silverstripe/framework/src/ORM/Connect/DBConnector.php

Source
======
  55:          if (!empty($sql)) {
  56:              $formatter = new SQLFormatter();
  57:              $formattedSQL = $formatter->formatPlain($sql);
  58:              $msg = "Couldn't run query:\n\n{$formattedSQL}\n\n{$msg}";
  59:          }
  60:  
  61:          if ($errorLevel === E_USER_ERROR) {
  62:              // Treating errors as exceptions better allows for responding to errors
  63:              // in code, such as credential checking during installation
* 64:              throw new DatabaseException($msg, 0, null, $sql, $parameters);
  65:          } else {
  66:              user_error($msg, $errorLevel);
  67:          }
  68:      }
  69:  
  70:      /**

[normann]

This issue seemed very often being caught, i.e. when searching a Link object in either a ModelAdmin which manages Links or a GridFiled's "link existing" lookup.
Could any maintainer of the module have a look at this issue, please?

[sunnysideup]

see: #109.

If you are looking for a fix now, add this to app/_config/link.yml:

---
Name: app-link
---

Sheadawson\Linkable\Models\Link:
  searchable_fields:
    Title: PartialMatchFilter
    URL: PartialMatchFilter
    Phone: PartialMatchFilter
    Email: PartialMatchFilter