mirror of
https://github.com/ToolJet/ToolJet
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18 lines
957 B
TypeScript
18 lines
957 B
TypeScript
import { MigrationInterface, QueryRunner } from 'typeorm';
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// ToolJet runs migrations when the app boots up in containerized enviroments
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// Apart from db migrations we also do data manipulations using migrations which may not be idempotent
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// Therefore we need to introduce lock to handle concurrency issues
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// https://github.com/typeorm/typeorm/issues/3400
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//
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// We are thus creating two migrations that ensure atleast one will be run
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// NOTE: The expectation is that migrations are to be run in a single transaction
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// such that when the transaction has ended the lock will be released
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export class LockMigrationsTable1234567890000 implements MigrationInterface {
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public async up(queryRunner: QueryRunner): Promise<void> {
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await queryRunner.query("DELETE FROM migrations where name = 'LockMigrationsTable1234567891000'");
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await queryRunner.query('LOCK TABLE migrations;');
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}
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public async down(queryRunner: QueryRunner): Promise<void> {}
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}
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