Fixes for 389 Directory Server - addresses recursion issue #314. The primary issue was that 389DS doesnt render the subschemaSubentry attribute unless it is specifically requested.

README.md

@@ -61,7 +61,7 @@ Support is known for these LDAP servers:
 - [X] OpenLDAP
 - [X] OpenDJ
 - [ ] Microsoft Active Directory
-- [ ] 389 Directory Server
+- [X] 389 Directory Server
 
 If there is an LDAP server that you have that you would like to have supported, please open an issue to request it.
 You might need to provide access, provide a copy or instructions to get an environment for testing. If you have enabled 

app/Classes/LDAP/Attribute.php

@@ -311,7 +311,7 @@ class Attribute implements \Countable, \ArrayAccess
 	 */
 	public function render(bool $edit=FALSE,bool $old=FALSE,bool $new=FALSE): View
 	{
-		$view = match ($this->schema->syntax_oid) {
+		$view = match ($this->schema?->syntax_oid) {
 			self::SYNTAX_CERTIFICATE => view('components.syntax.certificate'),
 			self::SYNTAX_CERTIFICATE_LIST => view('components.syntax.certificatelist'),
 

app/Classes/LDAP/Schema/Base.php

@@ -20,7 +20,7 @@ abstract class Base {
 	protected string $name = '';
 
 	// The OID of this schema item.
-	protected string $oid;
+	protected string $oid = '';
 
 	# The description of this schema item.
 	protected string $description = '';

app/Classes/LDAP/Server.php

@@ -361,7 +361,8 @@ final class Server
 
 			// Try to get the schema DN from the specified entry.
 			$schema_dn = $this->schemaDN();
-			$schema = $this->fetch($schema_dn);
+			// @note: 389DS does not return subschemaSubentry unless it is requested
+			$schema = $this->fetch($schema_dn,['*','+','subschemaSubentry']);
 
 			// If our schema's null, we didnt find it.
 			if (! $schema)