---
name: "DBIx::Class::Helper::Schema::Verifier"
section: "3pm"
platform: "linux"
package: "libdbix-class-helpers-perl"
version: "2.037000-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/DBIx::Class::Helper::Schema::Verifier"
---

# DBIx::Class::Helper::Schema::Verifier(3pm)

Verify the Results and ResultSets of your Schemata

## NAME

DBIx::Class::Helper::Schema::Verifier - Verify the Results and ResultSets of your Schemata

## SYNOPSIS

```
 package MyApp::Schema;
 __PACKAGE__->load_components('Helper::Schema::Verifier');
 sub result_verifiers {
   (
      sub {
         my ($self, $result, $set) = @_;
         for ($result, $set) {
            die "$_ does not start with the letter A" unless m/^A/
         }
      },
      shift->next::method,
   )
 }
```

## DESCRIPTION

`"DBIx::Class::Helper::Schema::Verifier"` is a minuscule framework to assist in creating schemata that are to your very own exacting specifications.  It is inspired by my own travails in discovering that `"use mro 'c3'"` is both required and barely documented in much Perl code.  As time goes by I expect to add many more verifiers, but with this inaugural release I am merely including DBIx::Class::Helper::Schema::Verifier::C3.

## INTERFACE METHODS

### result\_verifiers

You must implement `"result_verifiers"` in your subclass of `"::Verifier"`.  Each verifier gets called on the schema and gets each result and resultset together as arguments.  You can use this to validate almost anything about the results and resultsets of a schema; contributions are warmly welcomed.

## MORE ERRORS

Initially I kept this module simple, but after using it in production at ZipRecruiter \<https://www.ziprecruiter.com\> I found that showing the user the first error that occurred and then giving up was pretty annoying.  Now `"Schema::Verifier"` wraps both "load\_namespaces" in DBIx::Class::Schema and "load\_classes" in DBIx::Class::Schema and shows all the exceptions encoutered as a list at the end of loading all the results.

## AUTHOR

Arthur Axel "fREW" Schmidt \<frioux+cpan@gmail.com\>

## COPYRIGHT AND LICENSE

This software is copyright (c) 2024 by Arthur Axel "fREW" Schmidt.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.