deepkit-framework/packages/sql/src/sql-adapter.ts at master · equilcode/deepkit-framework · GitHub

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* Deepkit Framework

* This program is free software: you can redistribute it and/or modify

* it under the terms of the MIT License.

* You should have received a copy of the MIT License along with this program.

import {

BaseQuery,

Database,

DatabaseAdapter,

DatabaseAdapterQueryFactory,

DatabaseError,

DatabaseLogger,

DatabasePersistence,

DatabasePersistenceChangeSet,

DatabaseQueryModel,

DatabaseSession,

DatabaseTransaction,

DeleteResult,

Entity,

FilterQuery,

GenericQueryResolver,

PatchResult,

Query,

RawFactory,

Replace,

Resolve,

SORT_ORDER

} from '@deepkit/orm';

import { ClassType, isArray } from '@deepkit/core';

import { Changes, ClassSchema, getClassSchema, hasClassSchema, plainToClass, t } from '@deepkit/type';

import { DefaultPlatform, SqlPlaceholderStrategy } from './platform/default-platform';

import { SqlBuilder } from './sql-builder';

import { SqlFormatter } from './sql-formatter';

import { sqlSerializer } from './serializer/sql-serializer';

import { DatabaseComparator, DatabaseModel } from './schema/table';

import { Stopwatch } from '@deepkit/stopwatch';

export type SORT_TYPE = SORT_ORDER | { $meta: 'textScore' };

export type DEEP_SORT<T extends Entity> = { [P in keyof T]?: SORT_TYPE } & { [P: string]: SORT_TYPE };

export class SQLQueryModel<T extends Entity> extends DatabaseQueryModel<T, FilterQuery<T>, DEEP_SORT<T>> {

where?: SqlQuery;

sqlSelect?: SqlQuery;

clone(parentQuery: BaseQuery<T>): this {

const m = super.clone(parentQuery);

m.where = this.where ? this.where.clone() : undefined;

m.sqlSelect = this.sqlSelect ? this.sqlSelect.clone() : undefined;

return m;

}

isPartial(): boolean {

return super.isPartial() || !!this.sqlSelect;

}

export abstract class SQLStatement {

abstract get(params?: any[]): Promise<any>;

abstract all(params?: any[]): Promise<any[]>;

abstract release(): void

}

export abstract class SQLConnection {

released: boolean = false;

constructor(

protected connectionPool: SQLConnectionPool,

protected logger: DatabaseLogger = new DatabaseLogger,

public transaction?: DatabaseTransaction,

public stopwatch?: Stopwatch

) {

}

release() {

this.connectionPool.release(this);

}

abstract prepare(sql: string): Promise<SQLStatement>;

/**

* Runs a single SQL query.

abstract run(sql: string, params?: any[]): Promise<any>;

abstract getChanges(): Promise<number>;

async execAndReturnSingle(sql: string, params?: any[]): Promise<any> {

const stmt = await this.prepare(sql);

try {

return await stmt.get(params);

} finally {

stmt.release();

}

async execAndReturnAll(sql: string, params?: any[]): Promise<any> {

const stmt = await this.prepare(sql);

try {

return await stmt.all(params);

} finally {

stmt.release();

}

export abstract class SQLConnectionPool {

protected activeConnections = 0;

/**

* Reserves an existing or new connection. It's important to call `.release()` on it when

* done. When release is not called a resource leak occurs and server crashes.

abstract getConnection(logger?: DatabaseLogger, transaction?: DatabaseTransaction, stopwatch?: Stopwatch): Promise<SQLConnection>;

public getActiveConnections() {

return this.activeConnections;

}

release(connection: SQLConnection) {

this.activeConnections--;

connection.released = true;

}

function buildSetFromChanges(platform: DefaultPlatform, classSchema: ClassSchema, changes: Changes<any>): string[] {

const set: string[] = [];

const scopeSerializer = platform.serializer.for(classSchema);

if (changes.$set) {

const value = scopeSerializer.partialSerialize(changes.$set);

for (const i in value) {

if (!value.hasOwnProperty(i)) continue;

set.push(`${platform.quoteIdentifier(i)} = ${platform.quoteValue(value[i])}`);

}

if (changes.$inc) {

for (const i in changes.$inc) {

if (!changes.$inc.hasOwnProperty(i)) continue;

set.push(`${platform.quoteIdentifier(i)} = ${platform.quoteIdentifier(i)} + ${platform.quoteValue(changes.$inc[i])}`);

}

if (changes.$unset) {

for (const i in changes.$unset) {

if (!changes.$unset.hasOwnProperty(i)) continue;

set.push(`${platform.quoteIdentifier(i)} = NULL`);

}

return set;

}

export class SQLQueryResolver<T extends Entity> extends GenericQueryResolver<T> {

protected tableId = this.platform.getTableIdentifier.bind(this.platform);

protected quoteIdentifier = this.platform.quoteIdentifier.bind(this.platform);

protected quote = this.platform.quoteValue.bind(this.platform);

constructor(

protected connectionPool: SQLConnectionPool,

protected platform: DefaultPlatform,

classSchema: ClassSchema<T>,

session: DatabaseSession<DatabaseAdapter>

) {

super(classSchema, session);

}

protected createFormatter(withIdentityMap: boolean = false) {

return new SqlFormatter(

this.classSchema,

sqlSerializer,

this.session.getHydrator(),

withIdentityMap ? this.session.identityMap : undefined

);

}

protected getTableIdentifier(schema: ClassSchema) {

return this.platform.getTableIdentifier(schema);

}

async count(model: SQLQueryModel<T>): Promise<number> {

const sqlBuilderFrame = this.session.stopwatch ? this.session.stopwatch.start('SQL Builder') : undefined;

const sqlBuilder = new SqlBuilder(this.platform);

const sql = sqlBuilder.build(this.classSchema, model, 'SELECT COUNT(*) as count');

if (sqlBuilderFrame) sqlBuilderFrame.end();

const connectionFrame = this.session.stopwatch ? this.session.stopwatch.start('Connection acquisition') : undefined;

const connection = await this.connectionPool.getConnection(this.session.logger, this.session.assignedTransaction, this.session.stopwatch);

if (connectionFrame) connectionFrame.end();

try {

const row = await connection.execAndReturnSingle(sql.sql, sql.params);

//postgres has bigint as return type of COUNT, so we need to convert always

return Number(row.count);

} finally {

connection.release();

}

async delete(model: SQLQueryModel<T>, deleteResult: DeleteResult<T>): Promise<void> {

if (model.hasJoins()) throw new Error('Delete with joins not supported. Fetch first the ids then delete.');

const sqlBuilderFrame = this.session.stopwatch ? this.session.stopwatch.start('SQL Builder') : undefined;

const sqlBuilder = new SqlBuilder(this.platform);

const sql = sqlBuilder.build(this.classSchema, model, 'DELETE');

if (sqlBuilderFrame) sqlBuilderFrame.end();

const connectionFrame = this.session.stopwatch ? this.session.stopwatch.start('Connection acquisition') : undefined;

const connection = await this.connectionPool.getConnection(this.session.logger, this.session.assignedTransaction, this.session.stopwatch);

if (connectionFrame) connectionFrame.end();

try {

await connection.run(sql.sql, sql.params);

deleteResult.modified = await connection.getChanges();

//todo, implement deleteResult.primaryKeys

} finally {

connection.release();

}

async find(model: SQLQueryModel<T>): Promise<T[]> {

const sqlBuilderFrame = this.session.stopwatch ? this.session.stopwatch.start('SQL Builder') : undefined;

const sqlBuilder = new SqlBuilder(this.platform);

// console.log('find', model);

const sql = sqlBuilder.select(this.classSchema, model);

if (sqlBuilderFrame) sqlBuilderFrame.end();

const connectionFrame = this.session.stopwatch ? this.session.stopwatch.start('Connection acquisition') : undefined;

const connection = await this.connectionPool.getConnection(this.session.logger, this.session.assignedTransaction, this.session.stopwatch);

if (connectionFrame) connectionFrame.end();

try {

const rows = await connection.execAndReturnAll(sql.sql, sql.params);

const formatterFrame = this.session.stopwatch ? this.session.stopwatch.start('Formatter') : undefined;

const results: T[] = [];

if (model.isAggregate() || model.sqlSelect) {

//when aggregate the field types could be completely different, so don't normalize

for (const row of rows) results.push(row); //mysql returns not a real array, so we have to iterate

if (formatterFrame) formatterFrame.end();

return results;

}

const formatter = this.createFormatter(model.withIdentityMap);

if (model.hasJoins()) {

const converted = sqlBuilder.convertRows(this.classSchema, model, rows);

for (const row of converted) results.push(formatter.hydrate(model, row));

} else {

for (const row of rows) results.push(formatter.hydrate(model, row));

}

if (formatterFrame) formatterFrame.end();

return results;

} catch (error) {

throw new DatabaseError(`Could not query ${this.classSchema.getClassName()} due to SQL error ${error}.\nSQL: ${sql.sql}\nParams: ${JSON.stringify(sql.params)}`);

} finally {

connection.release();

}

async findOneOrUndefined(model: SQLQueryModel<T>): Promise<T | undefined> {

const sqlBuilderFrame = this.session.stopwatch ? this.session.stopwatch.start('SQL Builder') : undefined;

const sqlBuilder = new SqlBuilder(this.platform);

const sql = sqlBuilder.select(this.classSchema, model);

if (sqlBuilderFrame) sqlBuilderFrame.end();

const connectionFrame = this.session.stopwatch ? this.session.stopwatch.start('Connection acquisition') : undefined;

const connection = await this.connectionPool.getConnection(this.session.logger, this.session.assignedTransaction, this.session.stopwatch);

if (connectionFrame) connectionFrame.end();

let row: any;

try {

row = await connection.execAndReturnSingle(sql.sql, sql.params);

if (!row) return;

} catch (error) {

throw new DatabaseError(`Could not query ${this.classSchema.getClassName()} due to SQL error ${error}.\nSQL: ${sql.sql}\nParams: ${JSON.stringify(sql.params)}`);

} finally {

connection.release();

}

if (model.isAggregate() || model.sqlSelect) {

//when aggregate the field types could be completely different, so don't normalize

return row;

}

const formatterFrame = this.session.stopwatch ? this.session.stopwatch.start('Formatter') : undefined;

try {

const formatter = this.createFormatter(model.withIdentityMap);

if (model.hasJoins()) {

const [converted] = sqlBuilder.convertRows(this.classSchema, model, [row]);

return formatter.hydrate(model, converted);

} else {

return formatter.hydrate(model, row);

}

} finally {

if (formatterFrame) formatterFrame.end();

}

async has(model: SQLQueryModel<T>): Promise<boolean> {

return await this.count(model) > 0;

}

async patch(model: SQLQueryModel<T>, changes: Changes<T>, patchResult: PatchResult<T>): Promise<void> {

//this is the default SQL implementation that does not support RETURNING functionality (e.g. returning values from changes.$inc)

const sqlBuilderFrame = this.session.stopwatch ? this.session.stopwatch.start('SQL Builder') : undefined;

const set = buildSetFromChanges(this.platform, this.classSchema, changes);

const sqlBuilder = new SqlBuilder(this.platform);

const sql = sqlBuilder.update(this.classSchema, model, set);

if (sqlBuilderFrame) sqlBuilderFrame.end();

const connectionFrame = this.session.stopwatch ? this.session.stopwatch.start('Connection acquisition') : undefined;

const connection = await this.connectionPool.getConnection(this.session.logger, this.session.assignedTransaction, this.session.stopwatch);

if (connectionFrame) connectionFrame.end();

try {

await connection.run(sql.sql, sql.params);

patchResult.modified = await connection.getChanges();

} finally {

connection.release();

}

type QueryPart = string | SqlQuery | SqlQueryParameter | SQLQueryIdentifier;

export class SqlQueryParameter {

constructor(public value: any) {

}

export class SQLQueryIdentifier {

constructor(public id: any) {

}

export function identifier(id: string) {

return new SQLQueryIdentifier(id);

}

export class SqlQuery {

constructor(public parts: ReadonlyArray<QueryPart>) {

}

public clone(): SqlQuery {

return new SqlQuery(this.parts.slice());

}

convertToSQL(

platform: DefaultPlatform,

placeholderStrategy: SqlPlaceholderStrategy,

tableName?: string

): { sql: string, params: any[] } {

let sql = '';

const params: any[] = [];

for (const part of this.parts) {

if (part instanceof SqlQuery) {

sql += part.convertToSQL(platform, placeholderStrategy);

} else if (part instanceof SQLQueryIdentifier) {

const column = platform.quoteIdentifier(part.id);

if (tableName) {

sql += tableName + '.' + column;

} else {

sql += column;

}

} else if (part instanceof SqlQueryParameter) {

if (part.value instanceof ClassSchema) {

sql += platform.getTableIdentifier(part.value);

} else if (hasClassSchema(part.value)) {

sql += platform.getTableIdentifier(getClassSchema(part.value));

} else {

sql += placeholderStrategy.getPlaceholder();

params.push(part.value);

}

} else {

sql += part;

}

return { sql, params };

}

export function sql(strings: TemplateStringsArray, ...params: ReadonlyArray<any>) {

const parts: QueryPart[] = [strings[0]];

for (let i = 1; i < strings.length; i++) {

if (

params[i - 1] instanceof SqlQuery

|| params[i - 1] instanceof SqlQueryParameter

|| params[i - 1] instanceof SQLQueryIdentifier

) {

parts.push(params[i - 1]);

} else {

parts.push(new SqlQueryParameter(params[i - 1]));

}

parts.push(strings[i]);

}

return new SqlQuery(parts);

}

export class SQLDatabaseQuery<T extends Entity> extends Query<T> {

public model: SQLQueryModel<T> = new SQLQueryModel<T>();

constructor(

classSchema: ClassSchema<T>,

protected databaseSession: DatabaseSession<DatabaseAdapter>,

protected resolver: SQLQueryResolver<T>

) {

super(classSchema, databaseSession, resolver);

if (!databaseSession.withIdentityMap) this.model.withIdentityMap = false;

}

/**

* Adds raw SQL to the where clause of the query.

* If there is a `filter()` set as well, the where is added after the filter using AND.

* ```

* database.query(User).where(`id > ${id}`).find();

* ```

* Use `${identifier('name')} = ${'Peter'}` for column names that need to be quoted.

where(sql: SqlQuery): this {

const c = this.clone();

c.model.where = sql;

return c as any;

}

/**

* Adds additional selects to the query.

* Automatically converts the query to a partial (no class instances).

sqlSelect(sql: SqlQuery): Replace<this, Pick<Resolve<this>, any>> {

const c = this.clone();

c.model.sqlSelect = sql;

return c as any;

}

export class SQLDatabaseQueryFactory extends DatabaseAdapterQueryFactory {

constructor(protected connectionPool: SQLConnectionPool, protected platform: DefaultPlatform, protected databaseSession: DatabaseSession<any>) {

super();

}

createQuery<T extends Entity>(

classType: ClassType<T> | ClassSchema<T>

): SQLDatabaseQuery<T> {

return new SQLDatabaseQuery(getClassSchema(classType), this.databaseSession,

new SQLQueryResolver(this.connectionPool, this.platform, getClassSchema(classType), this.databaseSession)

);

}

export class SqlMigrationHandler {

protected migrationEntity: ClassSchema;

constructor(protected database: Database<SQLDatabaseAdapter>) {

this.migrationEntity = t.schema({

version: t.number.primary,

created: t.date,

}, { name: database.adapter.platform.getMigrationTableName() });

}

public async setLatestMigrationVersion(version: number): Promise<void> {

const session = this.database.createSession();

session.add(plainToClass(this.migrationEntity, {

version: version,

created: new Date,

}));

await session.commit();

}

public async removeMigrationVersion(version: number): Promise<void> {

const session = this.database.createSession();

await session.query(this.migrationEntity).filter({ version }).deleteOne();

}

public async getLatestMigrationVersion(): Promise<number> {

const session = this.database.createSession();

try {

const version = await session.query(this.migrationEntity).sort({ version: 'desc' }).findOneOrUndefined();

return version ? version.version : 0;

} catch (error) {

const connection = await this.database.adapter.connectionPool.getConnection();

try {

const [table] = this.database.adapter.platform.createTables([this.migrationEntity]);

const createSql = this.database.adapter.platform.getAddTableDDL(table);

for (const sql of createSql) {

await connection.run(sql);

}

return 0;

} finally {

connection.release();

}

export class RawQuery {

constructor(

protected session: DatabaseSession<SQLDatabaseAdapter>,

protected connectionPool: SQLConnectionPool,

protected platform: DefaultPlatform,

protected sql: SqlQuery,

) {

}

/**

* Executes the raw query and returns nothing.

async execute(): Promise<void> {

const sql = this.sql.convertToSQL(this.platform, new this.platform.placeholderStrategy);

const connection = await this.connectionPool.getConnection(this.session.logger, this.session.assignedTransaction, this.session.stopwatch);

try {

return await connection.run(sql.sql, sql.params);

} finally {

connection.release();

}

/**

* Returns the raw result of a single row.

async findOne(): Promise<any> {

return (await this.find())[0];

}

/**

* Returns the full result of a raw query.

async find(): Promise<any[]> {

const sql = this.sql.convertToSQL(this.platform, new this.platform.placeholderStrategy);

const connection = await this.connectionPool.getConnection(this.session.logger, this.session.assignedTransaction, this.session.stopwatch);

try {

const res = await connection.execAndReturnAll(sql.sql, sql.params);

return isArray(res) ? [...res] : [];

} finally {

connection.release();

}

export class SqlRawFactory implements RawFactory<[SqlQuery]> {

constructor(

protected session: DatabaseSession<SQLDatabaseAdapter>,

protected connectionPool: SQLConnectionPool,

protected platform: DefaultPlatform,

) {

}

create(sql: SqlQuery): RawQuery {

return new RawQuery(this.session, this.connectionPool, this.platform, sql);

}

export abstract class SQLDatabaseAdapter extends DatabaseAdapter {

public abstract platform: DefaultPlatform;

public abstract connectionPool: SQLConnectionPool;

abstract queryFactory(databaseSession: DatabaseSession<this>): SQLDatabaseQueryFactory;

abstract createPersistence(databaseSession: DatabaseSession<this>): SQLPersistence;

abstract getSchemaName(): string;

rawFactory(session: DatabaseSession<this>): SqlRawFactory {

return new SqlRawFactory(session, this.connectionPool, this.platform);

}

async getInsertBatchSize(schema: ClassSchema): Promise<number> {

return Math.floor(30000 / schema.getProperties().length);

}

async getUpdateBatchSize(schema: ClassSchema): Promise<number> {

return Math.floor(30000 / schema.getProperties().length);

}

isNativeForeignKeyConstraintSupported() {

return true;

}

/**

* Creates (and re-creates already existing) tables in the database.

* This is only for testing purposes useful.

* WARNING: THIS DELETES ALL AFFECTED TABLES AND ITS CONTENT.

public async createTables(classSchemas: ClassSchema[]): Promise<void> {

const connection = await this.connectionPool.getConnection();

try {

const database = new DatabaseModel();

database.schemaName = this.getSchemaName();

this.platform.createTables(classSchemas, database);

const DDLs = this.platform.getAddTablesDDL(database);

for (const sql of DDLs) {

await connection.run(sql);

}

} finally {

connection.release();

}

public async getMigrations(classSchemas: ClassSchema[]): Promise<{ [name: string]: { sql: string[], diff: string } }> {

const migrations: { [name: string]: { sql: string[], diff: string } } = {};

const connection = await this.connectionPool.getConnection();

try {

for (const entity of classSchemas) {

const databaseModel = new DatabaseModel();

databaseModel.schemaName = this.getSchemaName();

this.platform.createTables(classSchemas, databaseModel);

const schemaParser = new this.platform.schemaParserType(connection, this.platform);

const parsedDatabaseModel = new DatabaseModel();

parsedDatabaseModel.schemaName = this.getSchemaName();

await schemaParser.parse(parsedDatabaseModel);

const databaseDiff = DatabaseComparator.computeDiff(parsedDatabaseModel, databaseModel);

if (databaseDiff) {

const table = databaseModel.getTableForSchema(entity);

databaseDiff.forTable(table);

const diff = databaseDiff.getDiff(table);

const upSql = this.platform.getModifyDatabaseDDL(databaseDiff);

if (upSql.length) {

migrations[entity.getName()] = { sql: upSql, diff: diff ? diff.toString() : '' };

}

} finally {

connection.release();

}

return migrations;

}

public async migrate(classSchemas: ClassSchema[]): Promise<void> {

const connection = await this.connectionPool.getConnection();

try {

const databaseModel = new DatabaseModel();

databaseModel.schemaName = this.getSchemaName();

this.platform.createTables(classSchemas, databaseModel);

const schemaParser = new this.platform.schemaParserType(connection, this.platform);

const parsedDatabaseModel = new DatabaseModel();

parsedDatabaseModel.schemaName = this.getSchemaName();

await schemaParser.parse(parsedDatabaseModel);

const databaseDiff = DatabaseComparator.computeDiff(parsedDatabaseModel, databaseModel);

if (!databaseDiff) {

return;

}

const upSql = this.platform.getModifyDatabaseDDL(databaseDiff);

if (!upSql.length) return;

for (const sql of upSql) {

try {

await connection.run(sql);

} catch (error) {

console.error('Could not execute migration SQL', sql, error);

throw error;

}

} finally {

connection.release();

}

export class SQLPersistence extends DatabasePersistence {

protected connection?: SQLConnection;

constructor(

protected platform: DefaultPlatform,

public connectionPool: SQLConnectionPool,

protected session: DatabaseSession<SQLDatabaseAdapter>,

) {

super();

}

async getConnection(): Promise<ReturnType<this['connectionPool']['getConnection']>> {

if (!this.connection) {

this.connection = await this.connectionPool.getConnection(this.session.logger, this.session.assignedTransaction, this.session.stopwatch);

}

return this.connection;

}

release() {

if (this.connection) this.connection.release();

}

protected prepareAutoIncrement(classSchema: ClassSchema, count: number) {

}

protected populateAutoIncrementFields<T>(classSchema: ClassSchema<T>, items: T[]) {

}

async insert<T extends Entity>(classSchema: ClassSchema<T>, items: T[]): Promise<void> {

await this.prepareAutoIncrement(classSchema, items.length);

await this.doInsert(classSchema, items);

}

async update<T extends Entity>(classSchema: ClassSchema<T>, changeSets: DatabasePersistenceChangeSet<T>[]): Promise<void> {

const batchSize = await this.session.adapter.getUpdateBatchSize(classSchema);

if (batchSize > changeSets.length) {

await this.batchUpdate(classSchema, changeSets);

} else {

for (let i = 0; i < changeSets.length; i += batchSize) {

await this.batchUpdate(classSchema, changeSets.slice(i, i + batchSize));

}

protected async doInsert<T>(classSchema: ClassSchema<T>, items: T[]) {

const batchSize = await this.session.adapter.getInsertBatchSize(classSchema);

if (batchSize > items.length) {

await this.batchInsert(classSchema, items);

await this.populateAutoIncrementFields(classSchema, items);

} else {

for (let i = 0; i < items.length; i += batchSize) {

const batched = items.slice(i, i + batchSize);

await this.batchInsert(classSchema, batched);

await this.populateAutoIncrementFields(classSchema, batched);

}

async batchUpdate<T extends Entity>(classSchema: ClassSchema<T>, changeSets: DatabasePersistenceChangeSet<T>[]): Promise<void> {

//simple update implementation that is not particular performant nor does it support atomic updates (like $inc)

const scopeSerializer = this.platform.serializer.for(classSchema);

const updates: string[] = [];

for (const changeSet of changeSets) {

const set: string[] = [];

const where: string[] = [];

const pk = scopeSerializer.partialSerialize(changeSet.primaryKey) as { [name: string]: any };

for (const i in pk) {

if (!pk.hasOwnProperty(i)) continue;

where.push(`${this.platform.quoteIdentifier(i)} = ${this.platform.quoteValue(pk[i])}`);

}

const value = scopeSerializer.partialSerialize(changeSet.changes.$set || {}) as { [name: string]: any };

for (const i in value) {

if (!value.hasOwnProperty(i)) continue;

set.push(`${this.platform.quoteIdentifier(i)} = ${this.platform.quoteValue(value[i])}`);

}

updates.push(`UPDATE ${this.platform.getTableIdentifier(classSchema)} SET ${set.join(', ')} WHERE ${where.join(' AND ')}`);

}

const sql = updates.join(';\n');

await (await this.getConnection()).run(sql);

}

protected async batchInsert<T>(classSchema: ClassSchema<T>, items: T[]) {

const scopeSerializer = this.platform.serializer.for(classSchema);

const insert: string[] = [];

const params: any[] = [];

this.resetPlaceholderSymbol();

const names: string[] = [];

for (const property of classSchema.getProperties()) {

if (property.isParentReference) continue;

if (property.backReference) continue;

if (property.isAutoIncrement) continue;

names.push(this.platform.quoteIdentifier(property.name));

}

for (const item of items) {

const converted = scopeSerializer.serialize(item);

const row: string[] = [];

for (const property of classSchema.getProperties()) {

if (property.isParentReference) continue;

if (property.backReference) continue;

if (property.isAutoIncrement) continue;

const v = converted[property.name];

params.push(v === undefined ? null : v);

row.push(this.getPlaceholderSymbol());

}

insert.push(row.join(', '));

}

const sql = this.getInsertSQL(classSchema, names, insert);

try {

await (await this.getConnection()).run(sql, params);

} catch (error) {

throw error;

}

protected resetPlaceholderSymbol() {

}

protected getPlaceholderSymbol() {

return '?';

}

protected getInsertSQL(classSchema: ClassSchema, fields: string[], values: string[]): string {

return `INSERT INTO ${this.platform.getTableIdentifier(classSchema)} (${fields.join(', ')}) VALUES (${values.join('), (')})`;

}

async remove<T extends Entity>(classSchema: ClassSchema<T>, items: T[]): Promise<void> {

const pks: any[] = [];

const pk = classSchema.getPrimaryField();

for (const item of items) {

pks.push(item[pk.name as keyof T]);

}

const inValues = pks.map(v => this.platform.quoteValue(v)).join(', ');

const sql = `DELETE FROM ${this.platform.getTableIdentifier(classSchema)} WHERE ${this.platform.quoteIdentifier(pk.name)} IN (${inValues})`;

await (await this.getConnection()).run(sql);

}

deepkit-framework/packages/sql/src/sql-adapter.ts at master · equilcode/deepkit-framework · GitHub

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