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| author | Aspen Smith <root@gws.fyi> | 2024-03-24T14·32-0400 |
|---|---|---|
| committer | aspen <root@gws.fyi> | 2024-03-31T19·22+0000 |
| commit | a1a29f7c0b5746aa5676e546b8ebae7518d9070b (patch) | |
| tree | f2343087d8d8b87f622c24115907a4bf7407c177 /web/panettone/src/migrations | |
| parent | d5f57ac6e68f3acd79f1abc91d8ee9afc435018f (diff) | |
feat(web/panettone): Add a system for database migrations r/7826
Add a system for writing, running, and tracking database migrations (changes to the database schema) over time, inspired by but significantly simpler than postmodern-passenger-pigeon. Migrations can be generated by running (PANETTONE.MODEL:GENERATE-MIGRATION "name"), and are numerically ordered lisp files that define (at least) a function called UP, which runs the migration. The migrations that have been run against the database are tracked in the `migrations` table, and when the `(PANETTONE.MODEL:MIGRATE)` function is called (as it is on startup), all migrations that have not yet been run are run within a transaction. This includes one migration `1-init-schema.lisp`, which migrates the database (idempotently) to the current state of the schema. Change-Id: Id243a47763abea649784b12f25a6d05c2267381c Reviewed-on: https://cl.tvl.fyi/c/depot/+/11253 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
Diffstat (limited to 'web/panettone/src/migrations')
| -rw-r--r-- | web/panettone/src/migrations/1-init-schema.lisp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/web/panettone/src/migrations/1-init-schema.lisp b/web/panettone/src/migrations/1-init-schema.lisp new file mode 100644 index 000000000000..3be6c4fcc0d0 --- /dev/null +++ b/web/panettone/src/migrations/1-init-schema.lisp @@ -0,0 +1,23 @@ +"Initialize the database schema from before migrations were added" + +(defun ddl/create-issue-status () + "Issue DDL to create the `issue-status' type, if it doesn't exist" + (unless (query (:select (:exists (:select 1 + :from 'pg_type + :where (:= 'typname "issue_status")))) + :single) + (query (sql-compile + `(:create-enum issue-status ,panettone.model:+issue-statuses+))))) + +(defun ddl/create-tables () + "Issue DDL to create all tables, if they don't already exist." + (dolist (table '(panettone.model:issue + panettone.model:issue-comment + panettone.model:issue-event + panettone.model:user-settings)) + (unless (table-exists-p (dao-table-name table)) + (create-table table)))) + +(defun up () + (ddl/create-issue-status) + (ddl/create-tables)) |