Created
March 2, 2020 17:13
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SQL QueryBuilder type-safe, tiny poc
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| interface QbWithSelection <T extends Record<string, any> = never, Return = T> { | |
| where: (condition: Partial<T>) => QueryBuilder<T, Return> | |
| join: <NT extends Record<string, any>>(tableName: string) => QueryBuilder<T & NT, Return> | |
| limit: (n: number) => QueryBuilder<T, Return> | |
| offset: (n: number) => QueryBuilder<T, Return> | |
| orderBy: <K extends keyof T>(columns: Array<K>, by: "ASC" | "DESC") => QueryBuilder<T, Return> | |
| getQuery: () => string | |
| run: () => Return | |
| } | |
| interface QueryBuilder <T extends Record<string, any> = never, Return = T> { | |
| readonly _R: Return | |
| select: <K extends keyof T>(columns: Array<K>, from: string) => QbWithSelection<T, Pick<T, K>> | |
| selectAll: (from: string) => QbWithSelection<T, T> | |
| } | |
| declare const qb: QueryBuilder<{ id: string, name: string, age: number } & { vehicleName: string }> |
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