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.\" ========================================================================
.\"
.IX Title "Mojolicious::Validator 3pm"
.TH Mojolicious::Validator 3pm "2019-02-05" "perl v5.28.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
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.SH "NAME"
Mojolicious::Validator \- Validate values
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Mojolicious::Validator;
\&
\&  my $validator = Mojolicious::Validator\->new;
\&  my $v = $validator\->validation;
\&  $v\->input({foo => \*(Aqbar\*(Aq});
\&  $v\->required(\*(Aqfoo\*(Aq)\->like(qr/ar$/);
\&  say $v\->param(\*(Aqfoo\*(Aq);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojolicious::Validator validates values for Mojolicious.
.SH "CHECKS"
.IX Header "CHECKS"
These validation checks are available by default.
.SS "equal_to"
.IX Subsection "equal_to"
.Vb 1
\&  $v = $v\->equal_to(\*(Aqfoo\*(Aq);
.Ve
.PP
String value needs to be equal to the value of another field.
.SS "in"
.IX Subsection "in"
.Vb 1
\&  $v = $v\->in(\*(Aqfoo\*(Aq, \*(Aqbar\*(Aq, \*(Aqbaz\*(Aq);
.Ve
.PP
String value needs to match one of the values in the list.
.SS "like"
.IX Subsection "like"
.Vb 1
\&  $v = $v\->like(qr/^[A\-Z]/);
.Ve
.PP
String value needs to match the regular expression.
.SS "num"
.IX Subsection "num"
.Vb 4
\&  $v = $v\->num;
\&  $v = $v\->num(2, 5);
\&  $v = $v\->num(2, undef);
\&  $v = $v\->num(undef, 5);
.Ve
.PP
String value needs to be a non-fractional number and if provided in the given
range.
.SS "size"
.IX Subsection "size"
.Vb 1
\&  $v = $v\->size(2, 5);
.Ve
.PP
String value length or size of Mojo::Upload object in bytes needs to be
between these two values.
.SS "upload"
.IX Subsection "upload"
.Vb 1
\&  $v = $v\->upload;
.Ve
.PP
Value needs to be a Mojo::Upload object, representing a file upload.
.SH "FILTERS"
.IX Header "FILTERS"
These filters are available by default.
.SS "trim"
.IX Subsection "trim"
.Vb 1
\&  $v = $v\->optional(\*(Aqfoo\*(Aq, \*(Aqtrim\*(Aq);
.Ve
.PP
Trim whitespace characters from both ends of string value with
\&\*(L"trim\*(R" in Mojo::Util.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
Mojolicious::Validator implements the following attributes.
.SS "checks"
.IX Subsection "checks"
.Vb 2
\&  my $checks = $validator\->checks;
\&  $validator = $validator\->checks({size => sub {...}});
.Ve
.PP
Registered validation checks, by default only \*(L"equal_to\*(R", \*(L"in\*(R",
\&\*(L"like\*(R", \*(L"num\*(R", \*(L"size\*(R" and \*(L"upload\*(R" are already defined.
.SH "METHODS"
.IX Header "METHODS"
Mojolicious::Validator inherits all methods from Mojo::Base and
implements the following new ones.
.SS "add_check"
.IX Subsection "add_check"
.Vb 1
\&  $validator = $validator\->add_check(size => sub {...});
.Ve
.PP
Register a validation check.
.PP
.Vb 5
\&  $validator\->add_check(foo => sub {
\&    my ($v, $name, $value, @args) = @_;
\&    ...
\&    return undef;
\&  });
.Ve
.SS "add_filter"
.IX Subsection "add_filter"
.Vb 1
\&  $validator = $validator\->add_filter(trim => sub {...});
.Ve
.PP
Register a new filter.
.PP
.Vb 5
\&  $validator\->add_filter(foo => sub {
\&    my ($v, $name, $value) = @_;
\&    ...
\&    return $value;
\&  });
.Ve
.SS "new"
.IX Subsection "new"
.Vb 1
\&  my $validator = Mojolicious::Validator\->new;
.Ve
.PP
Construct a new Mojolicious::Validator object.
.SS "validation"
.IX Subsection "validation"
.Vb 1
\&  my $v = $validator\->validation;
.Ve
.PP
Build Mojolicious::Validator::Validation object to perform validations.
.PP
.Vb 4
\&  my $v = $validator\->validation;
\&  $v\->input({foo => \*(Aqbar\*(Aq});
\&  $v\->required(\*(Aqfoo\*(Aq)\->size(1, 5);
\&  say $v\->param(\*(Aqfoo\*(Aq);
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.