Does anyone have some example of the code they use to enforce a unique
value in a column using Catalyst and FormFu? I have the database set up
to not allow duplicate values, but I don't know if it's unique until I
get the error back. This can't be the way.
I am sort of assuming that I would need a transformer on an element that
takes the value and runs a query against the database to see if it is
there or not? I'm not sure how that code would work or if it is even the
right way to go about it.
transformers:
- type: Callback
callback: MyApp::Utils::is_unique
sub is_unique {
my ( $value, $field_value ) = @_;
return $c->model(__PACKAGE__)->find({username=>$field_value}) ? 0:1;
}
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