- prevent graphql_debug message from being output if 2 connections ar…

…e registered that have the same fieldName, toType and ConnectionTypeName

- add isConnectionField identifier to fields registered via WPConnectionType
- fix typo in docblock

src/Registry/TypeRegistry.php

@@ -1089,7 +1089,28 @@ function ( $fields ) use ( $type_name, $field_name, $config ) {
 					return $fields;
 				}
 
+				// if a field has already been registered with the same name output a debug message
 				if ( isset( $fields[ $field_name ] ) ) {
+
+					// if the existing field is a connection type
+					// and the new field is also a connection type
+					// and the toType is the same for both
+					// then we can allow the duplicate field
+					if (
+						isset(
+							$fields[ $field_name ]['isConnectionField'],
+							$config['isConnectionField'],
+							$fields[ $field_name ]['toType'],
+							$config['toType'],
+							$fields[ $field_name ]['connectionTypeName'],
+							$config['connectionTypeName']
+						) &&
+						$fields[ $field_name ]['toType'] === $config['toType'] &&
+						$fields[ $field_name ]['connectionTypeName'] === $config['connectionTypeName']
+					) {
+						return $fields;
+					}
+
 					graphql_debug(
 						sprintf(
 							// translators: %1$s is the field name, %2$s is the type name.
@@ -1098,9 +1119,11 @@ function ( $fields ) use ( $type_name, $field_name, $config ) {
 							$type_name
 						),
 						[
-							'type'       => 'DUPLICATE_FIELD',
-							'field_name' => $field_name,
-							'type_name'  => $type_name,
+							'type'            => 'DUPLICATE_FIELD',
+							'field_name'      => $field_name,
+							'type_name'       => $type_name,
+							'existing_field'  => $fields[ $field_name ],
+							'duplicate_field' => $config,
 						]
 					);
 					return $fields;

src/Type/WPConnectionType.php

@@ -515,6 +515,7 @@ public function register_connection_field(): void {
 				'type'                  => true === $this->one_to_one ? $this->connection_name . 'Edge' : $this->connection_name,
 				'args'                  => array_merge( $this->get_pagination_args(), $this->where_args ),
 				'auth'                  => $this->auth,
+				'isConnectionField'     => true,
 				'deprecationReason'     => ! empty( $this->config['deprecationReason'] ) ? $this->config['deprecationReason'] : null,
 				'description'           => ! empty( $this->config['description'] )
 					? $this->config['description']

src/Type/WPInterfaceType.php

@@ -97,7 +97,7 @@ public function getInterfaces(): array {
 	public function prepare_fields( array $fields, string $type_name, array $config ): array {
 
 		/**
-		 * Filter all object fields, passing the $typename as a param
+		 * Filter all interface fields, passing the $typename as a param
 		 *
 		 * This is useful when several different types need to be easily filtered at once. . .for example,
 		 * if ALL types with a field of a certain name needed to be adjusted, or something to that tune