1Data::FormValidator::ReUssuelrtsC(o3n)tributed Perl DocuDmaetnat:a:tFioornmValidator::Results(3)
2
6 Data::FormValidator::Results - results of form input validation.
7
9 my $results = Data::FormValidator->check(\%input_hash, \%dfv_profile);
10 # Print the name of missing fields
12 if ( $results->has_missing ) {
13 for my $f ( $results->missing ) {
14 print $f, " is missing\n";
15 }
16 }
17 # Print the name of invalid fields
19 if ( $results->has_invalid ) {
20 for my $f ( $results->invalid ) {
21 print $f, " is invalid: ", $results->invalid( $f ), "\n";
22 }
23 }
24 # Print unknown fields
26 if ( $results->has_unknown ) {
27 for my $f ( $results->unknown ) {
28 print $f, " is unknown\n";
29 }
30 }
31 # Print valid fields
33 for my $f ( $results->valid() ) {
34 print $f, " = ", $results->valid( $f ), "\n";
35 }
36
38 This object is returned by the Data::FormValidator "check" method. It
39 can be queried for information about the validation results.
40
42 This method returns true if there were no invalid or missing fields,
43 else it returns false.
44 As a shorthand, When the $results object is used in boolean context, it
46 is overloaded to use the value of success() instead. That allows
47 creation of a syntax like this one used in
48 "CGI::Application::Plugin::ValidateRM":
49 my $results = $self->check_rm('form_display','_form_profile') || return $self->dfv_error_page;
51
53 In list context with no arguments, it returns the list of fields which
54 contain valid values:
55 @all_valid_field_names = $r->valid;
57 In a scalar context with no arguments, it returns an hash reference
59 which contains the valid fields as keys and their input as values:
60 $all_valid_href = $r->valid;
62 If called with one argument in scalar context, it returns the value of
64 that "field" if it contains valid data, "undef" otherwise. The value
65 will be an array ref if the field had multiple values:
66 $value = $r->valid('field');
68 If called with one argument in list context, it returns the values of
70 "field" as an array:
71 @values = $r->valid('field');
73 If called with two arguments, it sets "field" to "value" and returns
75 "value". This form is useful to alter the results from within some
76 constraints. See the Data::FormValidator::Constraints documentation.
77 $new_value = $r->valid('field',$new_value);
79
81 This method returns true if the results contain missing fields.
82
84 In list context it returns the list of fields which are missing. In a
85 scalar context, it returns an array reference to the list of missing
86 fields.
87 If called with an argument, it returns true if that "field" is missing,
89 undef otherwise.
90
92 This method returns true if the results contain fields with invalid
93 data.
94
96 In list context, it returns the list of fields which contains invalid
97 value.
98 In a scalar context, it returns an hash reference which contains the
100 invalid fields as keys, and references to arrays of failed constraints
101 as values.
102 If called with an argument, it returns the reference to an array of
104 failed constraints for "field".
105
107 This method returns true if the results contain unknown fields.
108
110 In list context, it returns the list of fields which are unknown. In a
111 scalar context, it returns an hash reference which contains the unknown
112 fields and their values.
113 If called with an argument, it returns the value of that "field" if it
115 is unknown, undef otherwise.
116
118 This method returns a hash reference to error messages. The exact
119 format is determined by parameters in the "msgs" area of the validation
120 profile, described in the Data::FormValidator documentation.
121 NOTE: the "msgs" parameter in the profile can take a code reference as
123 a value, allowing complete control of how messages are generated. If
124 such a code reference was provided there, it will be called here
125 instead of the usual processing, described below. It will receive as
126 arguments the Data::FormValidator::Results object and a hash reference
127 of control parameters.
128 The hashref passed in should contain the same options that you can
130 define in the validation profile. This allows you to separate the
131 controls for message display from the rest of the profile. While
132 validation profiles may be different for every form, you may wish to
133 format messages the same way across many projects.
134 Controls passed into the <msgs> method will be applied first, followed
136 by ones applied in the profile. This allows you to keep the controls
137 you pass to "msgs" as "global" and override them in a specific profile
138 if needed.
139
141 In a few cases, a constraint may discover meta data that is useful to
142 access later. For example, when using
143 Data::FormValidator::Constraints::Upload, several bits of meta data are
144 discovered about files in the process of validating. These can include
145 "bytes", "width", "height" and "extension". The "meta()" function is
146 used by constraint methods to set this data. It's also used to access
147 this data. Here are some examples.
148 # return all field names that have meta data
150 my @fields = $results->meta();
151 # To retrieve all meta data for a field:
153 $meta_href = $results->meta('img');
154 # Access a particular piece:
156 $width = $results->meta('img')->{width};
157 Here's how to set some meta data. This is useful to know if you are
159 writing your own complex constraint.
160 $self->meta('img', {
162 width => '50',
163 height => '60',
164 });
165 This function does not currently support multi-valued fields. If it
167 does in the future, the above syntax will still work.
168
170 Data::FormValidator, Data::FormValidator::Filters,
171 Data::FormValidator::Constraints,
172 Data::FormValidator::ConstraintsFactory
173
175 Author: Francis J. Lacoste <francis.lacoste@iNsu.COM> Maintainer: Mark
176 Stosberg <mark@summersault.com>
177
179 Copyright (c) 1999,2000 iNsu Innovations Inc. All rights reserved.
180 This program is free software; you can redistribute it and/or modify it
182 under the terms as perl itself.
183perl v5.30.1 2020-01-29 Data::FormValidator::Results(3)