SQLite

The Knex connection can be used to connect to a SQLite database.

Connections

Connection types:

• Knex

Knex

Properties

• client: enum: Required - Should be sqlite3 or sqlite to connect to SQLite.
• connection: object:
  • filename: string: Required - The path to the SQLite file (relative to the project root).
• useNullAsDefault: boolean: If true, undefined keys are replaced with NULL instead of DEFAULT.

Examples

Specify filename:

connections:
  - id: sqlite
    type: Knex
    properties:
      client: sqlite
      connection:
        filename: ./mydb.sqlite

Different connections in deployment and production environments:

connections:
  - id: knex
    type: Knex
    properties:
      client:
        _secret: KNEX_CLIENT
      connection:
        _json.parse:
          _secret: KNEX_CONNECTION

Environment variables in development:

LOWDEFY_SECRET_KNEX_CLIENT = sqlite
LOWDEFY_SECRET_KNEX_CONNECTION = {"filename": "./mydb.sqlite"}

Environment variables in production:

LOWDEFY_SECRET_KNEX_CLIENT = postgres
LOWDEFY_SECRET_KNEX_CONNECTION = {"user": "dbuser", "host": "database.server.com", "database": "mydb", "password": "secretpassword"}

Requests

Request types:

• KnexBuilder
• KnexRaw

KnexBuilder

Properties

• query: object[]: Required - SQL query builder array. An array of objects, with a single key which is the name of the knex builder function. The value should be an array of arguments to pass to the builder function.
• tableName: string | object: The name of the table to query from.

Examples

Build a query:

id: knexBuilder
type: KnexBuilder
connectionId: knex
properties:
  query:
    - select:
        - '*'
    - from:
        - users
    - where:
        - name
        - _state: name

Using tableName:

id: knexBuilder
type: KnexBuilder
connectionId: knex
properties:
  tableName: users
  query:
    - select:
        - '*'
    - where:
        - name
        - _state: name

Aliases:

id: knexBuilder
type: KnexBuilder
connectionId: knex
properties:
  tableName:
    a: tableA
    b: tableB
  query:
    - select:
        - aField: 'a.field'
        - bField: 'b.field'
    - limit:
        - 1

KnexRaw

Properties

• query: string: Required - SQL query string.
• parameters: string | number | array | object: SQL query parameters.

Examples

Simple raw query:

id: knexRaw
type: KnexRaw
connectionId: knex
properties:
  query: SELECT * FROM "my_table";

Query with named parameters:

id: knexRaw
type: KnexRaw
connectionId: knex
properties:
  query: select * from users where name = :name
  parameters:
    name:
      _state: selected_name

Query with positional parameters:

id: knexRaw
type: KnexRaw
connectionId: knex
properties:
  query: select * from users where name = ?
  parameters:
    - _state: selected_name

Reference a .sql file:

id: knexRaw
type: KnexRaw
connectionId: knex
properties:
  query:
    _ref: my_query.sql