storch

Storch is a module to migrate sqlight databases

Types

Migration

Migrations with an id and a sql script

pub type Migration {
  Migration(id: Int, up: String)
}

Constructors

```
Migration(id: Int, up: String)
```

MigrationError

</>

Migration error type

pub type MigrationError {
  DirectoryNotExist(String)
  InvalidMigrationName(String)
  InvalidMigrationId(String)
  TransactionError(sqlight.Error)
  MigrationsTableError(sqlight.Error)
  MigrationScriptError(Int, sqlight.Error)
}

Constructors

```
DirectoryNotExist(String)
```
Folder that you gave does not exist
```
InvalidMigrationName(String)
```
The migration script file name is not valid
```
InvalidMigrationId(String)
```
The migration script file has a non-integer id
```
TransactionError(sqlight.Error)
```
Error starting or comitting the migration transaction
```
MigrationsTableError(sqlight.Error)
```
Error reading/writing/creating the transactions table

MigrationScriptError(Int, sqlight.Error)

Error applying the migrations script

Functions

get_migrations

</>

pub fn get_migrations(
  in directory: String,
) -> Result(List(Migration), MigrationError)

Get a list of migrations from a folder in the filesystem migration files must end in .sql and start with an integer id followed by an underscore example: 0000001_init.sql

you could store these in the priv directory if you like, that’s probably the best way

migrate

</>

pub fn migrate(
  migrations: List(Migration),
  on connection: Connection,
) -> Result(Nil, MigrationError)

Pass in a list of migrations and a sqlight connection