validate username

This block is part of the condition group and was last modified in core v14.0.3.

validate username condition v12.0.1 Updated v14.0.3

Validates username format - allows letters, numbers, underscores, and dots only (no hyphens), 3 to 20 characters, not starting or ending with a dot or underscore

In pins 2

username required
value
The username to be checked.
max. length v14.0.3
number
Maximum length the username should have
Default 200

Out pins 1

valid
condition
The condition that says whether an username is valid or not.

valid=true only when the username is 3-20 characters of ASCII letters, digits, dots, or underscores, does not start or end with a dot or underscore, contains no consecutive dots/underscores, and is within max_length. Hyphens are NOT allowed despite the label. Example: username="my-name" -> false (hyphen).

special characters

A typical wiring for validate username: substring feeds the username pin; the valid out pin feeds branch.

Commonly used with

In production blueprints, this block is most often wired together with:

branch: this block feeds into it.
substring: feeds into this block.

Version history

Introduced in v12.0.1.

Last modified in v14.0.3.

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