dataLayer() function

Build the whole data layer from an emitted contract, in one call.

Signature:

export declare function dataLayer(options: DataLayerOptions): DataLayer;

Parameters

Returns:

DataLayer

The middleware array and a teardown hook.

Exceptions

When scope names a model the contract does not define.

Remarks

The middlewares are returned already composed, which is the point: a caller never orders them and so cannot order them wrongly. Under Prisma 7 this was five $extends calls whose sequence every service repeated and any service could get wrong, with a soft delete losing its deletedBy and nothing reporting it. Here the two halves that were order-dependent are one middleware, and what remains genuinely commutes.

Reach for the individual factories only to compose something this does not cover; for the ordinary case this is the entry point.

Example

const layer = dataLayer({
    contract: contractJson,
    scope: { Portfolio: { portfolio: ['id'] } },
    resolvers: { portfolio: () => currentPortfolioIds() },
    getActorId: currentActorId,
});

export const db = postgres<Contract>({
    contractJson,
    url: config.db.url,
    middleware: layer.middleware,
});

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