kysely
Version:
Type safe SQL query builder
161 lines (160 loc) • 4.43 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.jsonBuildObject = exports.jsonObjectFrom = exports.jsonArrayFrom = void 0;
const sql_js_1 = require("../raw-builder/sql.js");
/**
* An MS SQL Server helper for aggregating a subquery into a JSON array.
*
* NOTE: This helper only works correctly if you've installed the `ParseJSONResultsPlugin`.
* Otherwise the nested selections will be returned as JSON strings.
*
* The plugin can be installed like this:
*
* ```ts
* const db = new Kysely({
* dialect: new MssqlDialect(config),
* plugins: [new ParseJSONResultsPlugin()]
* })
* ```
*
* ### Examples
*
* ```ts
* const result = await db
* .selectFrom('person')
* .select((eb) => [
* 'id',
* jsonArrayFrom(
* eb.selectFrom('pet')
* .select(['pet.id as pet_id', 'pet.name'])
* .whereRef('pet.owner_id', '=', 'person.id')
* .orderBy('pet.name')
* .modifyEnd(sql`offset 0 rows`)
* ).as('pets')
* ])
* .execute()
*
* result[0].id
* result[0].pets[0].pet_id
* result[0].pets[0].name
* ```
*
* The generated SQL (MS SQL Server):
*
* ```sql
* select "id", (
* select coalesce((select * from (
* select "pet"."id" as "pet_id", "pet"."name"
* from "pet"
* where "pet"."owner_id" = "person"."id"
* order by "pet"."name"
* offset 0 rows
* ) as "agg" for json path, include_null_values), '[]')
* ) as "pets"
* from "person"
* ```
*/
function jsonArrayFrom(expr) {
return (0, sql_js_1.sql) `coalesce((select * from ${expr} as agg for json path, include_null_values), '[]')`;
}
exports.jsonArrayFrom = jsonArrayFrom;
/**
* An MS SQL Server helper for turning a subquery into a JSON object.
*
* The subquery must only return one row.
*
* NOTE: This helper only works correctly if you've installed the `ParseJSONResultsPlugin`.
* Otherwise the nested selections will be returned as JSON strings.
*
* The plugin can be installed like this:
*
* ```ts
* const db = new Kysely({
* dialect: new MssqlDialect(config),
* plugins: [new ParseJSONResultsPlugin()]
* })
* ```
*
* ### Examples
*
* ```ts
* const result = await db
* .selectFrom('person')
* .select((eb) => [
* 'id',
* jsonObjectFrom(
* eb.selectFrom('pet')
* .select(['pet.id as pet_id', 'pet.name'])
* .whereRef('pet.owner_id', '=', 'person.id')
* .where('pet.is_favorite', '=', 1)
* ).as('favorite_pet')
* ])
* .execute()
*
* result[0].id
* result[0].favorite_pet.pet_id
* result[0].favorite_pet.name
* ```
*
* The generated SQL (MS SQL Server):
*
* ```sql
* select "id", (
* select * from (
* select "pet"."id" as "pet_id", "pet"."name"
* from "pet"
* where "pet"."owner_id" = "person"."id"
* and "pet"."is_favorite" = @1
* ) as "agg" for json path, include_null_values, without_array_wrapper
* ) as "favorite_pet"
* from "person"
* ```
*/
function jsonObjectFrom(expr) {
return (0, sql_js_1.sql) `(select * from ${expr} as agg for json path, include_null_values, without_array_wrapper)`;
}
exports.jsonObjectFrom = jsonObjectFrom;
/**
* The MS SQL Server `json_query` function, single argument variant.
*
* NOTE: This helper only works correctly if you've installed the `ParseJSONResultsPlugin`.
* Otherwise the nested selections will be returned as JSON strings.
*
* The plugin can be installed like this:
*
* ```ts
* const db = new Kysely({
* dialect: new MssqlDialect(config),
* plugins: [new ParseJSONResultsPlugin()]
* })
* ```
*
* ### Examples
*
* ```ts
* const result = await db
* .selectFrom('person')
* .select((eb) => [
* 'id',
* jsonBuildObject({
* first: eb.ref('first_name'),
* last: eb.ref('last_name'),
* full: eb.fn('concat', ['first_name', eb.val(' '), 'last_name'])
* }).as('name')
* ])
* .execute()
* ```
*
* The generated SQL (MS SQL Server):
*
* ```sql
* select "id", json_query(
* '{"first":"'+"first_name"+',"last":"'+"last_name"+',"full":"'+concat("first_name", ' ', "last_name")+'"}'
* ) as "name"
* from "person"
* ```
*/
function jsonBuildObject(obj) {
return (0, sql_js_1.sql) `json_query('{${sql_js_1.sql.join(Object.keys(obj).map((k) => (0, sql_js_1.sql) `"${sql_js_1.sql.raw(k)}":"'+${obj[k]}+'"`), (0, sql_js_1.sql) `,`)}}')`;
}
exports.jsonBuildObject = jsonBuildObject;