nukak
Version:
flexible and efficient ORM, with declarative JSON syntax and smart type-safety
89 lines • 13.2 kB
JavaScript
import { unflatObjects, clone } from '../util/index.js';
import { getMeta } from '../entity/index.js';
import { AbstractQuerier } from './abstractQuerier.js';
export class AbstractSqlQuerier extends AbstractQuerier {
dialect;
hasPendingTransaction;
constructor(dialect) {
super();
this.dialect = dialect;
}
async findMany(entity, q) {
const query = this.dialect.find(entity, q);
const res = await this.all(query);
const founds = unflatObjects(res);
await this.fillToManyRelations(entity, founds, q.$select);
return founds;
}
async count(entity, q = {}) {
const query = this.dialect.count(entity, q);
const res = await this.all(query);
return Number(res[0].count);
}
async insertMany(entity, payload) {
if (!payload?.length) {
return [];
}
payload = clone(payload);
const query = this.dialect.insert(entity, payload);
const { ids } = await this.run(query);
const meta = getMeta(entity);
const payloadIds = payload.map((it, index) => {
it[meta.id] ??= ids[index];
return it[meta.id];
});
await this.insertRelations(entity, payload);
return payloadIds;
}
async updateMany(entity, q, payload) {
payload = clone(payload);
const query = this.dialect.update(entity, q, payload);
const { changes } = await this.run(query);
await this.updateRelations(entity, q, payload);
return changes;
}
async upsertOne(entity, conflictPaths, payload) {
payload = clone(payload);
const query = this.dialect.upsert(entity, conflictPaths, payload);
return this.run(query);
}
async deleteMany(entity, q, opts) {
const meta = getMeta(entity);
// TODO: select ID should be automatic unless specified to be ommited
const findQuery = await this.dialect.find(entity, { ...q, $select: [meta.id] });
const founds = await this.all(findQuery);
if (!founds.length) {
return 0;
}
const ids = founds.map((it) => it[meta.id]);
const query = this.dialect.delete(entity, { $where: ids }, opts);
const { changes } = await this.run(query);
await this.deleteRelations(entity, ids, opts);
return changes;
}
get hasOpenTransaction() {
return this.hasPendingTransaction;
}
async beginTransaction() {
if (this.hasPendingTransaction) {
throw TypeError('pending transaction');
}
this.hasPendingTransaction = true;
await this.run(this.dialect.beginTransactionCommand);
}
async commitTransaction() {
if (!this.hasPendingTransaction) {
throw TypeError('not a pending transaction');
}
await this.run('COMMIT');
this.hasPendingTransaction = undefined;
}
async rollbackTransaction() {
if (!this.hasPendingTransaction) {
throw TypeError('not a pending transaction');
}
await this.run('ROLLBACK');
this.hasPendingTransaction = undefined;
}
}
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type { Type, QueryOptions, QueryUpdateResult, QuerySearch, Query, QueryConflictPaths } from '../type/index.js';\nimport type { AbstractSqlDialect } from '../dialect/index.js';\nimport { unflatObjects, clone } from '../util/index.js';\nimport { getMeta } from '../entity/index.js';\nimport { AbstractQuerier } from './abstractQuerier.js';\n\nexport abstract class AbstractSqlQuerier extends AbstractQuerier {\n  private hasPendingTransaction?: boolean;\n\n  constructor(readonly dialect: AbstractSqlDialect) {\n    super();\n  }\n\n  /**\n   * read query.\n   * @param query the query\n   */\n  abstract all<T>(query: string): Promise<T[]>;\n\n  /**\n   * insert/update/delete/ddl query.\n   * @param query the query\n   */\n  abstract run(query: string): Promise<QueryUpdateResult>;\n\n  override async findMany<E>(entity: Type<E>, q: Query<E>) {\n    const query = this.dialect.find(entity, q);\n    const res = await this.all<E>(query);\n    const founds = unflatObjects(res);\n    await this.fillToManyRelations(entity, founds, q.$select);\n    return founds;\n  }\n\n  override async count<E>(entity: Type<E>, q: QuerySearch<E> = {}) {\n    const query = this.dialect.count(entity, q);\n    const res = await this.all<{ count: number }>(query);\n    return Number(res[0].count);\n  }\n\n  override async insertMany<E>(entity: Type<E>, payload: E[]) {\n    if (!payload?.length) {\n      return [];\n    }\n    payload = clone(payload);\n    const query = this.dialect.insert(entity, payload);\n    const { ids } = await this.run(query);\n    const meta = getMeta(entity);\n    const payloadIds = payload.map((it, index) => {\n      it[meta.id as string] ??= ids[index];\n      return it[meta.id];\n    });\n    await this.insertRelations(entity, payload);\n    return payloadIds;\n  }\n\n  override async updateMany<E>(entity: Type<E>, q: QuerySearch<E>, payload: E) {\n    payload = clone(payload);\n    const query = this.dialect.update(entity, q, payload);\n    const { changes } = await this.run(query);\n    await this.updateRelations(entity, q, payload);\n    return changes;\n  }\n\n  override async upsertOne<E>(entity: Type<E>, conflictPaths: QueryConflictPaths<E>, payload: E) {\n    payload = clone(payload);\n    const query = this.dialect.upsert(entity, conflictPaths, payload);\n    return this.run(query);\n  }\n\n  override async deleteMany<E>(entity: Type<E>, q: QuerySearch<E>, opts?: QueryOptions) {\n    const meta = getMeta(entity);\n    // TODO: select ID should be automatic unless specified to be ommited\n    const findQuery = await this.dialect.find(entity, { ...q, $select: [meta.id] });\n    const founds = await this.all<E>(findQuery);\n    if (!founds.length) {\n      return 0;\n    }\n    const ids = founds.map((it) => it[meta.id]);\n    const query = this.dialect.delete(entity, { $where: ids }, opts);\n    const { changes } = await this.run(query);\n    await this.deleteRelations(entity, ids, opts);\n    return changes;\n  }\n\n  override get hasOpenTransaction() {\n    return this.hasPendingTransaction;\n  }\n\n  override async beginTransaction() {\n    if (this.hasPendingTransaction) {\n      throw TypeError('pending transaction');\n    }\n    this.hasPendingTransaction = true;\n    await this.run(this.dialect.beginTransactionCommand);\n  }\n\n  override async commitTransaction() {\n    if (!this.hasPendingTransaction) {\n      throw TypeError('not a pending transaction');\n    }\n    await this.run('COMMIT');\n    this.hasPendingTransaction = undefined;\n  }\n\n  override async rollbackTransaction() {\n    if (!this.hasPendingTransaction) {\n      throw TypeError('not a pending transaction');\n    }\n    await this.run('ROLLBACK');\n    this.hasPendingTransaction = undefined;\n  }\n}\n"]}