server/drizzle/types.ts

import type {
    BuildQueryResult,
    DBQueryConfig,
    ExtractTablesWithRelations,
} from "drizzle-orm";

import type * as schema from "./schema";

type Schema = typeof schema;
type TablesWithRelations = ExtractTablesWithRelations<Schema>;

export type IncludeRelation<TableName extends keyof TablesWithRelations> =
    DBQueryConfig<
        "one" | "many",
        boolean,
        TablesWithRelations,
        TablesWithRelations[TableName]
    >["with"];

export type IncludeColumns<TableName extends keyof TablesWithRelations> =
    DBQueryConfig<
        "one" | "many",
        boolean,
        TablesWithRelations,
        TablesWithRelations[TableName]
    >["columns"];

export type InferQueryModel<
    TableName extends keyof TablesWithRelations,
    Columns extends IncludeColumns<TableName> | undefined = undefined,
    With extends IncludeRelation<TableName> | undefined = undefined,
> = BuildQueryResult<
    TablesWithRelations,
    TablesWithRelations[TableName],
    {
        columns: Columns;
        with: With;
    }
>;