Module id_gen 

First-class ID type generation and validation.

Supports: UUID v4, UUID v7, ULID, CUID2, NanoID.

All IDs are represented as strings for JSON compatibility. UUID v7 and ULID are time-sortable (lexicographic order = chronological order).

Functions

cuid2

Generate a CUID2 (Collision-resistant Unique Identifier v2).

cuid2_with_length

Generate a CUID2 with custom length (min 4, max 64).

detect_id_type

Detect the type of a string ID.

generate_by_type

Generate an ID by type name.

is_cuid2

Validate whether a string looks like a CUID2 (starts with letter, alphanumeric).

is_nanoid

Validate whether a string looks like a NanoID (URL-safe characters, reasonable length).

is_ulid

Validate whether a string is a valid ULID.

is_uuid

Validate whether a string is a valid UUID (any version).

nanoid

Generate a NanoID (URL-friendly unique string identifier).

nanoid_with_length

Generate a NanoID with custom length.

ulid

Generate a ULID (Universally Unique Lexicographically Sortable Identifier).

ulid_timestamp_ms

Extract the millisecond timestamp from a ULID.

uuid_v4

Generate a random UUID v4 (128-bit, not time-sortable).

uuid_v7

Generate a time-sorted UUID v7 (128-bit, time-sortable).

uuid_version

Extract the version from a UUID string (1-7, or 0 if invalid).