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change_subdomain: Create a deactivated realm on updating subdomain.

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When changing the subdomain of a realm, create a deactivated realm with
the old subdomain of the realm, and set its deactivated_redirect to the
new subdomain.
Doing this will help us to do the following:
- When a user visits the old subdomain of a realm, we can tell the user
that the realm has been moved.
- During the registration process, we can assure that the old subdomain
of the realm is not used to create a new realm.

If the subdomain is changed multiple times, the deactivated_redirect
fields of all the deactivated realms are updated to point to the new
uri.
This commit is contained in:
Siddharth Asthana
2020-12-19 00:47:20 +05:30
committed by Alex Vandiver
parent 42dfd98607
commit 6c888977a6
4 changed files with 64 additions and 4 deletions
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17
zerver/lib/actions.py
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@@ -856,9 +856,26 @@ def do_reactivate_realm(realm: Realm) -> None:
}).decode())
def do_change_realm_subdomain(realm: Realm, new_subdomain: str) -> None:
old_subdomain = realm.subdomain
old_uri = realm.uri
realm.string_id = new_subdomain
realm.save(update_fields=["string_id"])
# If a realm if being renamed multiple times, we should find all the placeholder
# realms and reset their deactivated_redirect field to point to the new realm uri
placeholder_realms = Realm.objects.filter(deactivated_redirect=old_uri,
deactivated=True)
for placeholder_realm in placeholder_realms:
do_add_deactivated_redirect(placeholder_realm, realm.uri)
# When we change a realm's subdomain the realm with old subdomain is basically
# deactivated. We are creating a deactivated realm using old subdomain and setting
# it's deactivated redirect to new_subdomain so that we can tell the users that
# the realm has been moved to a new subdomain.
placeholder_realm = do_create_realm(old_subdomain, "placeholder-realm")
do_deactivate_realm(placeholder_realm)
do_add_deactivated_redirect(placeholder_realm, realm.uri)
def do_add_deactivated_redirect(realm: Realm, redirect_url: str) -> None:
realm.deactivated_redirect = redirect_url
realm.save(update_fields=["deactivated_redirect"])