Type Mapping

Database to TypeScript

Typelizer maps database column types to TypeScript types:

Column Type	TypeScript Type
boolean	boolean
integer	number
float	number
decimal	number
string	string
text	string
citext	string
uuid	string
date	string
datetime	string
time	string

Unknown column types map to unknown.

Database to OpenAPI

When generating OpenAPI schemas, column types map to OpenAPI types with optional format specifiers:

Column Type	OpenAPI Type	Format
integer	integer
bigint	integer	int64
float	number	float
decimal	number	double
boolean	boolean
string	string
text	string
citext	string
uuid	string	uuid
date	string	date
datetime	string	date-time
time	string	time
json	object
jsonb	object
binary	string	binary
inet	string
cidr	string

Custom Type Mapping

Override the default mapping in your configuration:

Typelizer.configure do |config|
  config.type_mapping = config.type_mapping.merge(
    jsonb: "Record<string, unknown>",
    inet: "string"
  )
end

This affects TypeScript generation. OpenAPI mappings use a separate, fixed table.