This will later be used to expand matching linkifier patterns.
Making it nullable for now, but we will make it required in
the APIs.
As a part of this transition, we temporarily make url_format_string
nullable as well, which will be later removed. This allows us to
switch to populating url_template without caring about passing
url_format_string.
Note that the validators are imported in the migration because Django
otherwise diffs it and considers the schema to be different, generating
a migration, failing the "tools/test-migrations" test.
Signed-off-by: Zixuan James Li <p359101898@gmail.com>
This directory contains scripts that are used in building, managing,
testing, and other forms of work in a Zulip development environment.
Note that tools that are also useful in production belong in
scripts/ or should be Django management commands.
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