cassandra-codegen/dist/types/utils.d.ts

Generate type definitions from a Cassandra database

import { mapping } from "cassandra-driver";
export type PartitionKey<T> = T & {
    __partitionKey: never;
};
export type Clustering<T, ClusteringOrder> = T & {
    __clustering: never;
};
export type CodegenQueryOperator<T> = mapping.q.QueryOperator & T;
type IfNotNever<T, K> = T extends never ? never : K;
export type DrainOuterGeneric<T> = [T] extends [unknown] ? T : never;
export type PartitionKeyType<T> = T extends PartitionKey<infer U> ? U | CodegenQueryOperator<U> : never;
export type PrimaryKeyType<T> = T extends (PartitionKey<infer U> | Clustering<infer U, any>) ? U | CodegenQueryOperator<U> : never;
type NonNeverPartitionKeys<T> = {
    [K in keyof T]: IfNotNever<PartitionKeyType<T[K]>, K>;
}[keyof T];
type NonNeverPrimaryKeys<T> = {
    [K in keyof T]: IfNotNever<PrimaryKeyType<T[K]>, K>;
}[keyof T];
export type PartitionKeyColumns<T> = DrainOuterGeneric<{
    [K in NonNeverPartitionKeys<T>]: PartitionKeyType<T[K]>;
}>;
export type PrimaryKeyColumns<T> = DrainOuterGeneric<{
    [K in NonNeverPrimaryKeys<T>]: PrimaryKeyType<T[K]>;
}>;
export {};