2.4 KiB
@tldraw/tlschema
This package houses type definitions, schema migrations, and other type metadata for the tldraw editor's default persisted data.
There are three main kinds of types:
-
Record types
These are root record types added to the
Store
class. They are defined in the./src/records
directory. -
Shape types
These are subtypes of the root TLShape record type. They allow specifying a unique name and custom props for a particular kind of shape.
-
Asset types
These are subtypes of the root TLAsset record type. They allow specifying a unique name and custom props for a particular kind of asset.
Adding migrations
If you make any kind of change to any persisted data shape in this package, you must add migrations that are able to convert old versions to new versions, and vice-versa.
If you are making a change that affects the structure of a record, shape, or asset, update the migrations in the same file as the record, shape, or asset is defined.
If you are making a change that affects the structure of the store (e.g. renaming or deleting a type, consolidating two shape types into one, etc), add your changes in the migrations in schema.ts
.
After making your changes, add a new version number, using a meaninful name. For example, if you add a new property
to the TLShape
type called ownerId
that points to a user, you might do this:
In TLShape.ts
const Versions = {
RemoveSomeProp: 1,
+ AddOwnerId: 2,
} as const
and then in the TLShape
type
x: number
y: number
+ ownerId: ID<TLUser> | null
props: Props
parentId: ID<TLShape> | ID<TLPage>
and then adding a migration:
export const shapeTypeMigrations = defineMigrations({
currentVersion: Versions.Initial,
firstVersion: Versions.Initial,
migrators: {
+ [Versions.AddOwnerId]: {
+ // add ownerId property
+ up: (shape) => ({...shape, ownerId: null}),
+ // remove ownerId property
+ down: ({ownerId, ...shape}) => shape,
+ }
},
After you've added your migration, make sure to add a test for it in src/migrations.test.ts
. It will complain if you do not!
License
The source code in this repository (as well as our 2.0+ distributions and releases) are currently licensed under Apache-2.0. These licenses are subject to change in our upcoming 2.0 release. If you are planning to use tldraw in a commercial product, please reach out at hello@tldraw.com.