typeorm/docs/updating-database-schema.md

Updating database schema

Your database schema is managed automatically by ORM:

• tables are created for all entities
• columns are created for all entity columns
• foreign keys are set for all relations
• junction tables are created for all many-to-many relations

All this must be in sync to make ORM to work correctly. To make a synchronization there are two ways:

• set in connection options autoSchemaCreate: true. In this case database schema will be automatically synchronized each time you run the application.

• use schema update gulp plugin and run schema synchronization process each time you need it.

First approach is not recommended to use in production, however it can be handy during development.