Std.Db.Repository.hasColumn

fn

This is a callable function.

What it does

Whether a result has a column of that name.

Asked before reading, because the layer beneath cannot tell a column that

is not there from one that held nothing, and inheriting that turns a typo

into a data condition found later and somewhere else.

Read the signature

• The text after the name is the type checked by Pudu.
• Read arrows from left to right: inputs come first, and the final type is returned.
• & borrows a value for this call instead of moving or copying it.