builder-web/bin/migrations/m20210216.ml

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let old_user_version = 1L
let new_user_version = 2L
let drop_user =
Caqti_request.exec ~oneshot:true
Caqti_type.unit
"DROP TABLE user"
let new_user =
Caqti_request.exec ~oneshot:true
Caqti_type.unit
{| CREATE TABLE user (
id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
username VARCHAR(255) NOT NULL UNIQUE,
password_hash BLOB NOT NULL,
password_salt BLOB NOT NULL,
scrypt_n INTEGER NOT NULL,
scrypt_r INTEGER NOT NULL,
scrypt_p INTEGER NOT NULL
)
|}
let old_user =
Caqti_request.exec
Caqti_type.unit
{| CREATE TABLE user (
id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
username VARCHAR(255) NOT NULL UNIQUE,
password_hash BLOB NOT NULL,
password_salt BLOB NOT NULL,
password_iter INTEGER NOT NULL
)
|}
let migrate (module Db : Caqti_blocking.CONNECTION) =
let open Rresult.R.Infix in
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Grej.check_version ~user_version:old_user_version (module Db) >>= fun () ->
Db.exec drop_user () >>= fun () ->
Db.exec new_user () >>= fun () ->
Db.exec (Grej.set_version new_user_version) ()
let rollback (module Db : Caqti_blocking.CONNECTION) =
let open Rresult.R.Infix in
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Grej.check_version ~user_version:new_user_version (module Db) >>= fun () ->
Db.exec drop_user () >>= fun () ->
Db.exec old_user () >>= fun () ->
Db.exec (Grej.set_version old_user_version) ()