NAME

Sah::Schema::date::dow_nums - Array of required date::dow_num (day-of-week, 1-7, 1=Monday, like DateTime, with coercions)

VERSION

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

SYNOPSIS

Sample data and validation results against this schema

 ""  # valid, becomes []

 1  # valid, becomes [1]

 [1]  # valid

 [1,undef]  # INVALID (Contains undef)

 [1,7]  # valid

 "1,7"  # valid, becomes [1,7]

 ["Mon","SunDAY"]  # valid, becomes [1,7]

 "Mo,SU"  # valid, becomes [1,7]

 [1,7,8]  # INVALID (Has number not in 1-7)

 "1,7,8"  # INVALID (Has number 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_nums*");
 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_nums", {return_type=>'str_errmsg'});
 my $errmsg = $validator->($data);
 
 # a sample valid data
 $data = ["Mon","SunDAY"];
 my $errmsg = $validator->($data); # => ""
 
 # a sample invalid data
 $data = [1,7,8];
 my $errmsg = $validator->($data); # => "\@[2]: 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_nums", {return_type=>'str_errmsg+val'});
 my $res = $validator->($data); # [$errmsg, $validated_val]
 
 # a sample valid data
 $data = [1,7];
 my $res = $validator->($data); # => ["",[1,7]]
 
 # a sample invalid data
 $data = [1,7,8];
 my $res = $validator->($data); # => ["\@[2]: Must be at most 7",[1,7,8]]

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_nums*");
     $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_nums*'],
         },
         ...
     },
 };
 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 Sah::Schema::date::dow_num which is the schema for the elements.

See also related schemas that coerce from other locales, e.g. Sah::Schema::date::dow_nums::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.