kysely
Version:
Type safe SQL query builder
69 lines (68 loc) • 1.64 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ParseJSONResultsPlugin = void 0;
const object_utils_js_1 = require("../../util/object-utils.js");
/**
* Parses JSON strings in query results into JSON objects.
*
* This plugin can be useful with dialects that don't automatically parse
* JSON into objects and arrays but return JSON strings instead.
*
* ```ts
* const db = new Kysely<DB>({
* ...
* plugins: [new ParseJSONResultsPlugin()]
* })
* ```
*/
class ParseJSONResultsPlugin {
// noop
transformQuery(args) {
return args.node;
}
async transformResult(args) {
return {
...args.result,
rows: parseArray(args.result.rows),
};
}
}
exports.ParseJSONResultsPlugin = ParseJSONResultsPlugin;
function parseArray(arr) {
for (let i = 0; i < arr.length; ++i) {
arr[i] = parse(arr[i]);
}
return arr;
}
function parse(obj) {
if ((0, object_utils_js_1.isString)(obj)) {
return parseString(obj);
}
if (Array.isArray(obj)) {
return parseArray(obj);
}
if ((0, object_utils_js_1.isPlainObject)(obj)) {
return parseObject(obj);
}
return obj;
}
function parseString(str) {
if (maybeJson(str)) {
try {
return parse(JSON.parse(str));
}
catch (err) {
// this catch block is intentionally empty.
}
}
return str;
}
function maybeJson(value) {
return value.match(/^[\[\{]/) != null;
}
function parseObject(obj) {
for (const key in obj) {
obj[key] = parse(obj[key]);
}
return obj;
}