Built-in Generators

Complete reference of all built-in generators.

Built-in Generators

Seedling ships with 40+ built-in generators organized by domain.

Strings

Generator	Description	Example Output
Email	Realistic email address	[e-mail]
Name	Full name	Alice Johnson
Username	Username string	alicej_92
Phone	Phone number	[phone]
UUID	UUID v4	a1b2c3d4-e5f6-...
ULID	ULID (sortable unique ID)	01ARZ3NDEKTSV4RRFFQ69G5FAV
String	Random string	xq7mK2pL
Lorem	Lorem ipsum text	Lorem ipsum dolor sit amet...

Numbers

Generator	Description	Parameters
RandomInt	Integer in range	min, max
Serial	Sequential counter	start, step
Constant	Fixed value	value
WeightedChoice	Weighted random selection	choices (map of value → weight)
FloatRange	Float in range	min, max, precision
Numeric	SQL numeric/decimal	precision, scale

Dates

Generator	Description	Parameters
Now	Current timestamp	—
Timestamp	Timestamp in range	min_date, max_date
DateGenerator	Date in range	min_date, max_date
TimeAgo	Relative past time	max_duration
BusinessDays	Business days calculation	start_date, days

Geography

Generator	Description
Latitude	Random latitude (-90 to 90)
Longitude	Random longitude (-180 to 180)
Country	Random country name
CountryCode	ISO 3166-1 alpha-2 code
City	Random city name
Address	Full street address
PostalCode	Random postal/ZIP code

Network

Generator	Description
IPv4	Random IPv4 address
IPv6	Random IPv6 address
MAC	Random MAC address
URL	Random URL
UserAgent	Random user-agent string

Finance / Media

Generator	Description
Currency	Currency code (USD, EUR, GBP…)
Amount	Monetary amount
Company	Company name
JobTitle	Job title
FileName	File name with extension
ImageURL	Image URL

Special

Generator	Description
Bool	Random boolean
Null	Always produces NULL
Sequence	Auto-incrementing (for serial columns)
FKPool	FK lookup from parent table
SelfFK	Self-referencing FK with multi-pass