can update mode of environment now

api/server/handlers/environment/update_environment_settings.go

@@ -74,6 +74,11 @@ func (c *UpdateEnvironmentSettingsHandler) ServeHTTP(w http.ResponseWriter, r *h
 		changed = true
 	}
 
+	if request.Mode != env.Mode {
+		env.Mode = request.Mode
+		changed = true
+	}
+
 	if changed {
 		_, err = c.Repo().Environment().UpdateEnvironment(env)
 

api/types/environment.go

@@ -134,6 +134,7 @@ type ToggleNewCommentRequest struct {
 type ListEnvironmentsResponse []*Environment
 
 type UpdateEnvironmentSettingsRequest struct {
+	Mode               string   `json:"mode" form:"oneof=auto manual"`
 	DisableNewComments bool     `json:"disable_new_comments"`
 	GitRepoBranches    []string `json:"git_repo_branches"`
 }