1 | package Mojolicious::Validator::Validation;
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2 | use Mojo::Base -base;
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3 |
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4 | use Carp ();
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5 | use Scalar::Util ();
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6 |
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7 | has [qw(csrf_token topic validator)];
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8 | has [qw(input output)] => sub { {} };
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9 |
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10 | sub AUTOLOAD {
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11 | my $self = shift;
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12 |
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13 | my ($package, $method) = our $AUTOLOAD =~ /^(.+)::(.+)$/;
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14 | Carp::croak "Undefined subroutine &${package}::$method called"
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15 | unless Scalar::Util::blessed $self && $self->isa(__PACKAGE__);
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16 |
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17 | return $self->check($method => @_) if $self->validator->checks->{$method};
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18 | Carp::croak qq{Can't locate object method "$method" via package "$package"};
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19 | }
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20 |
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21 | sub check {
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22 | my ($self, $check) = (shift, shift);
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23 |
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24 | return $self unless $self->is_valid;
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25 |
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26 | my $cb = $self->validator->checks->{$check};
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27 | my $name = $self->topic;
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28 | my $values = $self->output->{$name};
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29 | for my $value (ref $values eq 'ARRAY' ? @$values : $values) {
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30 | next unless my $result = $self->$cb($name, $value, @_);
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31 | return $self->error($name => [$check, $result, @_]);
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32 | }
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33 |
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34 | return $self;
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35 | }
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36 |
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37 | sub csrf_protect {
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38 | my $self = shift;
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39 | my $token = $self->input->{csrf_token};
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40 | $self->error(csrf_token => ['csrf_protect'])
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41 | unless $token && $token eq ($self->csrf_token // '');
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42 | return $self;
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43 | }
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44 |
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45 | sub error {
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46 | my ($self, $name) = (shift, shift);
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47 | return $self->{error}{$name} unless @_;
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48 | $self->{error}{$name} = shift;
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49 | delete $self->output->{$name};
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50 | return $self;
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51 | }
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52 |
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53 | sub every_param {
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54 | return [] unless defined(my $value = $_[0]->output->{$_[1] // $_[0]->topic});
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55 | return [ref $value eq 'ARRAY' ? @$value : $value];
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56 | }
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57 |
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58 | sub failed { [sort keys %{shift->{error}}] }
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59 |
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60 | sub has_data { !!keys %{shift->input} }
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61 |
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62 | sub has_error { $_[1] ? exists $_[0]{error}{$_[1]} : !!keys %{$_[0]{error}} }
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63 |
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64 | sub is_valid { exists $_[0]->output->{$_[1] // $_[0]->topic} }
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65 |
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66 | sub optional {
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67 | my ($self, $name, @filters) = @_;
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68 |
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69 | return $self->topic($name) unless defined(my $input = $self->input->{$name});
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70 |
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71 | my @input = ref $input eq 'ARRAY' ? @$input : ($input);
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72 | for my $cb (map { $self->validator->filters->{$_} } @filters) {
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73 | @input = map { $self->$cb($name, $_) } @input;
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74 | }
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75 | $self->output->{$name} = ref $input eq 'ARRAY' ? \@input : $input[0]
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76 | if @input && !grep { !length } @input;
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77 |
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78 | return $self->topic($name);
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79 | }
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80 |
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81 | sub param { shift->every_param(shift)->[-1] }
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82 |
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83 | sub passed { [sort keys %{shift->output}] }
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84 |
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85 | sub required {
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86 | my ($self, $name) = (shift, shift);
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87 | return $self if $self->optional($name, @_)->is_valid;
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88 | return $self->error($name => ['required']);
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89 | }
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90 |
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91 | 1;
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92 |
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93 | =encoding utf8
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94 |
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95 | =head1 NAME
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96 |
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97 | Mojolicious::Validator::Validation - Perform validations
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98 |
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99 | =head1 SYNOPSIS
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100 |
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101 | use Mojolicious::Validator;
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102 | use Mojolicious::Validator::Validation;
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103 |
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104 | my $validator = Mojolicious::Validator->new;
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105 | my $v = Mojolicious::Validator::Validation->new(validator => $validator);
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106 | $v->input({foo => 'bar'});
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107 | $v->required('foo')->in('bar', 'baz');
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108 | say $v->param('foo');
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109 |
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110 | =head1 DESCRIPTION
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111 |
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112 | L<Mojolicious::Validator::Validation> performs L<Mojolicious::Validator>
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113 | validation checks.
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114 |
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115 | =head1 ATTRIBUTES
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116 |
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117 | L<Mojolicious::Validator::Validation> implements the following attributes.
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118 |
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119 | =head2 csrf_token
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120 |
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121 | my $token = $v->csrf_token;
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122 | $v = $v->csrf_token('fa6a08...');
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123 |
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124 | CSRF token.
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125 |
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126 | =head2 input
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127 |
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128 | my $input = $v->input;
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129 | $v = $v->input({foo => 'bar', baz => [123, 'yada']});
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130 |
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131 | Data to be validated.
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132 |
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133 | =head2 output
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134 |
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135 | my $output = $v->output;
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136 | $v = $v->output({foo => 'bar', baz => [123, 'yada']});
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137 |
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138 | Validated data.
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139 |
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140 | =head2 topic
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141 |
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142 | my $topic = $v->topic;
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143 | $v = $v->topic('foo');
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144 |
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145 | Name of field currently being validated.
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146 |
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147 | =head2 validator
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148 |
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149 | my $v = $v->validator;
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150 | $v = $v->validator(Mojolicious::Validator->new);
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151 |
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152 | L<Mojolicious::Validator> object this validation belongs to.
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153 |
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154 | =head1 METHODS
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155 |
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156 | L<Mojolicious::Validator::Validation> inherits all methods from L<Mojo::Base>
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157 | and implements the following new ones.
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158 |
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159 | =head2 check
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160 |
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161 | $v = $v->check('size', 2, 7);
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162 |
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163 | Perform validation check on all values of the current L</"topic">, no more
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164 | checks will be performed on them after the first one failed. All checks from
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165 | L<Mojolicious::Validator/"CHECKS"> are supported.
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166 |
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167 | =head2 csrf_protect
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168 |
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169 | $v = $v->csrf_protect;
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170 |
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171 | Validate C<csrf_token> and protect from cross-site request forgery.
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172 |
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173 | =head2 error
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174 |
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175 | my $err = $v->error('foo');
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176 | $v = $v->error(foo => ['custom_check']);
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177 | $v = $v->error(foo => [$check, $result, @args]);
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178 |
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179 | Get or set details for failed validation check, at any given time there can
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180 | only be one per field.
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181 |
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182 | # Details about failed validation
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183 | my ($check, $result, @args) = @{$v->error('foo')};
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184 |
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185 | # Force validation to fail for a field without performing a check
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186 | $v->error(foo => ['some_made_up_check_name']);
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187 |
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188 | =head2 every_param
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189 |
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190 | my $values = $v->every_param;
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191 | my $values = $v->every_param('foo');
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192 |
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193 | Similar to L</"param">, but returns all values sharing the same name as an
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194 | array reference.
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195 |
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196 | # Get first value
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197 | my $first = $v->every_param('foo')->[0];
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198 |
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199 | =head2 failed
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200 |
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201 | my $names = $v->failed;
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202 |
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203 | Return an array reference with all names for values that failed validation.
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204 |
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205 | # Names of all values that failed
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206 | say for @{$v->failed};
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207 |
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208 | =head2 has_data
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209 |
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210 | my $bool = $v->has_data;
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211 |
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212 | Check if L</"input"> is available for validation.
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213 |
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214 | =head2 has_error
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215 |
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216 | my $bool = $v->has_error;
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217 | my $bool = $v->has_error('foo');
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218 |
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219 | Check if validation resulted in errors, defaults to checking all fields.
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220 |
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221 | =head2 is_valid
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222 |
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223 | my $bool = $v->is_valid;
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224 | my $bool = $v->is_valid('foo');
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225 |
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226 | Check if validation was successful and field has a value, defaults to checking
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227 | the current L</"topic">.
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228 |
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229 | =head2 optional
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230 |
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231 | $v = $v->optional('foo');
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232 | $v = $v->optional('foo', 'filter1', 'filter2');
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233 |
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234 | Change validation L</"topic"> and apply filters. All filters from
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235 | L<Mojolicious::Validator/"FILTERS"> are supported.
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236 |
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237 | # Trim value and check size
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238 | $v->optional('user', 'trim')->size(1, 15);
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239 |
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240 | =head2 param
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241 |
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242 | my $value = $v->param;
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243 | my $value = $v->param('foo');
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244 |
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245 | Access validated values, defaults to the current L</"topic">. If there are
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246 | multiple values sharing the same name, and you want to access more than just the
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247 | last one, you can use L</"every_param">.
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248 |
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249 | # Get value right away
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250 | my $user = $v->optional('user')->size(1, 15)->param;
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251 |
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252 | =head2 passed
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253 |
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254 | my $names = $v->passed;
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255 |
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256 | Return an array reference with all names for values that passed validation.
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257 |
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258 | # Names of all values that passed
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259 | say for @{$v->passed};
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260 |
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261 | =head2 required
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262 |
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263 | $v = $v->required('foo');
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264 | $v = $v->required('foo', 'filter1', 'filter2');
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265 |
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266 | Change validation L</"topic">, apply filters, and make sure a value is present
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267 | and not an empty string. All filters from L<Mojolicious::Validator/"FILTERS">
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268 | are supported.
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269 |
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270 | # Trim value and check size
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271 | $v->required('user', 'trim')->size(1, 15);
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272 |
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273 | =head1 AUTOLOAD
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274 |
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275 | In addition to the L</"ATTRIBUTES"> and L</"METHODS"> above, you can also call
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276 | validation checks provided by L</"validator"> on
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277 | L<Mojolicious::Validator::Validation> objects, similar to L</"check">.
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278 |
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279 | # Call validation checks
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280 | $v->required('foo')->size(2, 5)->like(qr/^[A-Z]/);
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281 | $v->optional('bar')->equal_to('foo');
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282 | $v->optional('baz')->in('test', '123');
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283 |
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284 | # Longer version
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285 | $v->required('foo')->check('size', 2, 5)->check('like', qr/^[A-Z]/);
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286 |
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287 | =head1 SEE ALSO
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288 |
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289 | L<Mojolicious>, L<Mojolicious::Guides>, L<https://mojolicious.org>.
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290 |
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291 | =cut
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