Built-in Generators

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

Strings

Generator	Description	Example Output
`Email`	Realistic email address	`jane.doe_42@example.com`
`Name`	Full name	`Alice Johnson`
`Username`	Username string	`alicej_92`
`Phone`	Phone number	`+1-555-123-4567`
`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