Type ORM

You can create INSERT queries using QueryBuilder. Examples: This is the most efficient way in terms of performance to insert rows into your database. You can also perform bulk insertions this way. Raw SQL support In some cases when you need to execute SQL queries you need to use function style value: This syntax doesn’t escape your values,…

You can get the generated SQL from the query builder by calling getQuery() or getQueryAndParameters(). If you just want the query you can use getQuery()             .getRepository(Customer)             .createQueryBuilder("customer")             .where("customer.id = :id", { id: 1 })             //…

QueryBuilder instances support common table expressions , if minimal supported version of your database supports them. Common table expressions aren’t supported for Oracle yet.

If the model you are querying has a column with the attribute @DeleteDateColumn set, the query builder will automatically query rows which are ‘soft deleted’. Let’s say you have the following entity: Using a standard find or query, you will not receive the rows which have a value in that row. However, if you do the following: You will…

You can create DELETE queries using QueryBuilder. Examples: This is the most efficient way in terms of performance to delete entities from your database. Soft-Delete Applying Soft Delete to QueryBuilder Examples: Restore-Soft-Delete Alternatively, You can recover the soft deleted rows by using the restore() method: Examples:

If the model you are querying has a column with a select: false column, you must use the addSelect function in order to retrieve the information from the column. Let’s say you have the following entity: Using a standard find or query, you will not receive the password property for the model. However, if you do the following: You will get the property password in…

Locking in TypeORM involves controlling access to database rows to prevent concurrency issues when multiple transactions or processes try to modify the same data simultaneously. There are different lock modes that determine how a database row is locked, and TypeORM provides methods to apply these lock modes when using the QueryBuilder. Here’s an in-depth explanation…

Most of the time when you develop an application, you need pagination functionality. This is used if you have pagination, page slider, or infinite scroll components in your application. This will give you the first 10 users with their photos. This will give you all except the first 10 users with their photos. You can…

There are two types of results you can get using select query builder: entities and raw results. Most of the time, you need to select real entities from your database, for example, users. For this purpose, you use getOne and getMany. However, sometimes you need to select specific data, like the sum of all user photos. Such data is not an entity,…

If you want to select only some entity properties, you can use the following syntax: