Fixed #3663

CHANGELOG-v3.md

@@ -17,6 +17,7 @@
 
 ### Fixed
 - Fixed a PHP notice that occurred when updating to Craft 3.1 if there were any plugins installed without settings.
+- Fixed a SQL error that occurred when updating to Craft 3.1 if a plugin or module was calling any `craft\services\Fields` methods. ([#3663](https://github.com/craftcms/cms/issues/3663))
 - Fixed a bug where commercial plugins weren’t installable from the Plugin Store.
 - Fixed a bug where Matrix block type fields’ `beforeSave()` methods weren’t getting called.
 - Fixed a bug where Matrix fields could forget their content table name if they were created with a non-global context.

src/services/Fields.php

@@ -1553,7 +1553,7 @@ private function _createGroupQuery(): Query
      */
     private function _createFieldQuery(): Query
     {
-        return (new Query())
+        $query = (new Query())
             ->select([
                 'fields.id',
                 'fields.dateCreated',
@@ -1563,7 +1563,6 @@ private function _createFieldQuery(): Query
                 'fields.handle',
                 'fields.context',
                 'fields.instructions',
-                'fields.searchable',
                 'fields.translationMethod',
                 'fields.translationKeyFormat',
                 'fields.type',
@@ -1572,6 +1571,14 @@ private function _createFieldQuery(): Query
             ])
             ->from(['{{%fields}} fields'])
             ->orderBy(['fields.name' => SORT_ASC, 'fields.handle' => SORT_ASC]);
+
+        // todo: remove schema version condition after next beakpoint
+        $schemaVersion = Craft::$app->getProjectConfig()->get('system.schemaVersion');
+        if (version_compare($schemaVersion, '3.1.0', '>=')) {
+            $query->addSelect(['fields.searchable']);
+        }
+
+        return $query;
     }
 
     /**