[#3700] allow a single OAuth2 user to be used for authentication in multiple auth collection

migrations/1640988000_init.go

@@ -85,7 +85,7 @@ func init() {
 			);
 
 			CREATE UNIQUE INDEX _externalAuths_record_provider_idx on {{_externalAuths}} ([[collectionId]], [[recordId]], [[provider]]);
-			CREATE UNIQUE INDEX _externalAuths_provider_providerId_idx on {{_externalAuths}} ([[provider]], [[providerId]]);
+			CREATE UNIQUE INDEX _externalAuths_collection_provider_idx on {{_externalAuths}} ([[collectionId]], [[provider]], [[providerId]]);
 		`).Execute()
 		if tablesErr != nil {
 			return tablesErr

migrations/1701496825_allow_single_oauth2_provider_in_multiple_auth_collections.go

@@ -0,0 +1,23 @@
+package migrations
+
+import (
+	"github.com/pocketbase/dbx"
+)
+
+// Fixes the unique _externalAuths constraint for old installations
+// to allow a single OAuth2 provider to be registered for different auth collections.
+func init() {
+	AppMigrations.Register(func(db dbx.Builder) error {
+		_, createErr := db.NewQuery("CREATE UNIQUE INDEX IF NOT EXISTS _externalAuths_collection_provider_idx on {{_externalAuths}} ([[collectionId]], [[provider]], [[providerId]])").Execute()
+		if createErr != nil {
+			return createErr
+		}
+
+		_, dropErr := db.NewQuery("DROP INDEX IF EXISTS _externalAuths_provider_providerId_idx").Execute()
+		if dropErr != nil {
+			return dropErr
+		}
+
+		return nil
+	}, nil)
+}