Use FormCache

atst/routes/errors.py

@@ -8,7 +8,6 @@ from atst.domain.invitations import (
     ExpiredError as InvitationExpiredError,
     WrongUserError as InvitationWrongUserError,
 )
-from atst.utils.form_cache import cache_form_data
 
 
 def log_error(e):
@@ -40,7 +39,7 @@ def make_error_pages(app):
         log_error(e)
         url_args = {"sessionExpired": True, "next": request.path}
         if request.method == "POST":
-            url_args["formCache"] = cache_form_data(app.redis, request.form)
+            url_args["formCache"] = app.form_cache.write(request.form)
         return redirect(url_for("atst.root", **url_args))
 
     @app.errorhandler(Exception)