/ 
Sah-Schemas-Date-0.017
River stage one • 6 direct dependents • 9 total dependents
/ Sah::Schema::date::dow_num

NAME

Sah::Schema::date::dow_num - Day-of-week number (1-7, 1=Monday, like DateTime), coercible from English day-of-week name (Mo/mon/MONDAY)

VERSION

This document describes version 0.017 of Sah::Schema::date::dow_num (from Perl distribution Sah-Schemas-Date), released on 2021-08-04.

SYNOPSIS

Sample data and validation results against this schema

""  # INVALID (Empty string)

0  # INVALID (Not in 1-7)

1  # valid

"Tue"  # valid, becomes 2

"foo"  # INVALID (Not a known English day-of-week name)

7  # valid

8  # INVALID (Not in 1-7)

Using with Data::Sah

To check data against this schema (requires Data::Sah):

use Data::Sah qw(gen_validator);
my $validator = gen_validator("date::dow_num*");
say $validator->($data) ? "valid" : "INVALID!";

The above schema returns a boolean value (true if data is valid, false if otherwise). To return an error message string instead (empty string if data is valid, a non-empty error message otherwise):

my $validator = gen_validator("date::dow_num", {return_type=>'str_errmsg'});
my $errmsg = $validator->($data);

# a sample valid data
$data = 1;
my $errmsg = $validator->($data); # => ""

# a sample invalid data
$data = 8;
my $errmsg = $validator->($data); # => "Must be at most 7"

Often a schema has coercion rule or default value, so after validation the validated value is different. To return the validated (set-as-default, coerced, prefiltered) value:

my $validator = gen_validator("date::dow_num", {return_type=>'str_errmsg+val'});
my $res = $validator->($data); # [$errmsg, $validated_val]

# a sample valid data
$data = 1;
my $res = $validator->($data); # => ["",1]

# a sample invalid data
$data = 8;
my $res = $validator->($data); # => ["Must be at most 7",8]

Data::Sah can also create validator that returns a hash of detaild error message. Data::Sah can even create validator that targets other language, like JavaScript, from the same schema. Other things Data::Sah can do: show source code for validator, generate a validator code with debug comments and/or log statements, generate human text from schema. See its documentation for more details.

Using with Params::Sah

To validate function parameters against this schema (requires Params::Sah):

use Params::Sah qw(gen_validator);

sub myfunc {
    my @args = @_;
    state $validator = gen_validator("date::dow_num*");
    $validator->(\@args);
    ...
}

Using with Perinci::CmdLine::Lite

To specify schema in Rinci function metadata and use the metadata with Perinci::CmdLine (Perinci::CmdLine::Lite) to create a CLI:

# in lib/MyApp.pm
package
  MyApp;
our %SPEC;
$SPEC{myfunc} = {
    v => 1.1,
    summary => 'Routine to do blah ...',
    args => {
        arg1 => {
            summary => 'The blah blah argument',
            schema => ['date::dow_num*'],
        },
        ...
    },
};
sub myfunc {
    my %args = @_;
    ...
}
1;

# in myapp.pl
package
  main;
use Perinci::CmdLine::Any;
Perinci::CmdLine::Any->new(url=>'/MyApp/myfunc')->run;

# in command-line
% ./myapp.pl --help
myapp - Routine to do blah ...
...

% ./myapp.pl --version

% ./myapp.pl --arg1 ...

DESCRIPTION

See also related schemas that coerce from other locales, e.g. Sah::Schema::date::dow_num::id (Indonesian), Sah::Schema::date::dow_num::en_or_id (English/Indonesian), etc.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Sah-Schemas-Date.

SOURCE

Source repository is at https://github.com/perlancar/perl-Sah-Schemas-Date.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Sah-Schemas-Date

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2021, 2020, 2019 by perlancar@cpan.org.

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