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pagination.md

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Pagination

Stainless provides helpers for easily implementing pagination that follows the pristine convention.

Pristine convention

Request query parameters

  • pageAfter (optional string) - if given, this should be the endCursor of the previous page. The API will fetch items immediately after this cursor.
  • pageBefore (optional string) - if given, this should be the startCursor of the next page. The API will fetch items immediately before this cursor.
  • pageSize (optional number) - the number of items to include in the result
  • sortBy (optional string) - an enum constant indicating the field(s) to sort by
  • sortDirection (optional, "asc" or "desc") - the sort direction

z.PaginationParams provides a Zod schema for these parameters.

Response fields

  • items (array) - up to pageSize items
  • startCursor (string or null) - the cursor of the first item in items, or null if items is empty
  • endCursor (string or null) - the cursor of the last item in items, or null if items is empty
  • hasNextPage (optional boolean) - whether there are more items after this page. May be omitted when paginating backward with pageBefore.
  • hasPreviousPage (optional boolean) - whether there are more items before this page. May be omitted when paginating backward with pageBefore.

z.pageResponse provides a Zod schema for these response fields.

Forward and backward pagination

Paginating backwards does not change the sort order; in other words, if we have page A, and we get page B = pageAfter: A.endCursor, then get page C = pageBefore: B.startCursor, C should be deep equal to A as long as no underlying data has changed.

Pagination schema types

stainless exports the following schemas and functions from import { z } from 'stainless':

z.PaginationParams

A Zod schema for the base request query parameters. You may call z.PaginationParams.extend({...}) to override defaults or add parameters to it.

z.pageResponse(item)

Creates a Zod schema for a page response with the given item type schema.

z.PageData<I>

The output type of z.pageResponse(item: I).

z.PageItemType<D extends z.PageData<any>>

Extracts the item type from the page data type D.

z.AnyPageData

A Zod schema for a page response whose items are any type.

z.SortDirection

A Zod schema for sortDirection ("asc" | "desc").

Prisma integration

The @stl-api/prisma plugin makes it easy to implement paginated list endpoints from Prisma schemas.