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#------------------------------------------------------------------------------ |
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# DBO::Visitor::Check - check record for validity |
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# |
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# DESCRIPTION |
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# A visitor class that checks a record from a database table |
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# (represented as a hash mapping column name to value) for validity. |
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# |
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# AUTHOR |
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# Gareth Rees |
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# |
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# COPYRIGHT |
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# Copyright (c) 1999 Canon Research Centre Europe Ltd/ |
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# |
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# $Id: Check.pm,v 1.3 1999/06/21 15:11:24 garethr Exp $ |
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#------------------------------------------------------------------------------ |
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1235
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use strict; |
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package DBO::Visitor::Check; |
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use base qw(DBO::Visitor); |
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1037
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use Class::Multimethods; |
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multimethod visit_table => |
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qw(DBO::Visitor::Check DBO::Table DBO::Handle) => |
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sub { |
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my ($vis, $table, $handle) = @_; |
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foreach my $col (@{$table->{columns}}) { |
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visit_column($vis, $col, $handle) or return 0; |
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} |
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return 1; |
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}; |
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multimethod visit_column => |
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qw(DBO::Visitor::Check DBO::Column::Base DBO::Handle) => |
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sub { |
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my ($vis, $col, $handle) = @_; |
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if ($col->{not_null} and not defined $vis->{record}{$col->{name}}) { |
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$vis->{error} = DBO::Exception->new |
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(NULL_COLUMN => "You must supply a value for %s.", $col->{name}); |
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return 0; |
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} |
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return 1; |
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}; |
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multimethod visit_column => |
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qw(DBO::Visitor::Check DBO::Column::Number DBO::Handle) => |
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sub { |
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my ($vis, $col, $handle) = @_; |
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# visit_column($vis, superclass($col), $handle) or return 0; |
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call_next_method() or return 0; |
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my $value = $vis->{record}{$col->{name}}; |
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if (defined $value and do { local $^W; $value + 0 ne $value }) { |
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$vis->{error} = DBO::Exception->new |
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(NUMERIC => "You must supply a number for %s.", $col->{name}); |
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return 0; |
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} |
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return 1; |
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}; |
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multimethod visit_column => |
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qw(DBO::Visitor::Check DBO::Column::Integer DBO::Handle) => |
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sub { |
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my ($vis, $col, $handle) = @_; |
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# visit_column($vis, superclass($col), $handle) or return 0; |
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call_next_method() or return 0; |
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my $value = $vis->{record}{$col->{name}}; |
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if (defined $value and $value != int $value) { |
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$vis->{error} = DBO::Exception->new |
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(INTEGER => "You must supply an integer for %s.", $col->{name}); |
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return 0; |
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} |
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return 1; |
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}; |
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multimethod visit_column => |
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qw(DBO::Visitor::Check DBO::Column::Unsigned DBO::Handle) => |
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sub { |
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my ($vis, $col, $handle) = @_; |
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# visit_column($vis, superclass($col), $handle) or return 0; |
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call_next_method() or return 0; |
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my $value = $vis->{record}{$col->{name}}; |
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if (defined $value and $value < 0) { |
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$vis->{error} = DBO::Exception->new |
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(UNSIGNED => "The value for %s must be non-negative.", $col->{name}); |
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return 0; |
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} |
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return 1; |
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}; |
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multimethod visit_column => |
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qw(DBO::Visitor::Check DBO::Column::Option DBO::Handle) => |
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sub { |
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my ($vis, $col, $handle) = @_; |
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# visit_column($vis, superclass($col), $handle) or return 0; |
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call_next_method() or return 0; |
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my $value = $vis->{record}{$col->{name}}; |
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unless (grep { $_ eq $value } @{$col->{values}}) { |
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$vis->{error} = DBO::Exception->new |
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(OPTION => "The value for %s must be one of %s.", |
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$col->{name}, join ", ", @{$col->{values}}); |
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return 0; |
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} |
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return 1; |
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}; |
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multimethod visit_column => |
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qw(DBO::Visitor::Check DBO::Column::ForeignKey DBO::Handle) => |
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sub { |
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my ($vis, $col, $handle) = @_; |
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# visit_column($vis, superclass($col), $handle) or return 0; |
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call_next_method() or return 0; |
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my $value = $vis->{record}{$col->{name}}; |
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# TODO: Fetch values from foreign table and check. |
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return 1; |
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}; |
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multimethod visit_column => |
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qw(DBO::Visitor::Check DBO::Column::Char DBO::Handle) => |
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sub { |
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my ($vis, $col, $handle) = @_; |
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# visit_column($vis, superclass($col), $handle) or return 0; |
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call_next_method() or return 0; |
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my $value = $vis->{record}{$col->{name}}; |
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if (defined $value and $col->{max_length} < length $value) { |
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$vis->{error} = DBO::Exception->new |
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(LENGTH => "The value for %s is %d characters long (must be at most %d characters long).", |
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$col->{name}, length $value, $col->{max_length}); |
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return 0; |
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} |
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return 1; |
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}; |
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multimethod visit_column => |
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qw(DBO::Visitor::Check DBO::Column::Time DBO::Handle) => |
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sub { |
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my ($vis, $col, $handle) = @_; |
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# visit_column($vis, superclass($col), $handle) or return 0; |
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call_next_method() or return 0; |
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my $value = $vis->{record}{$col->{name}}; |
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if ($value !~ /^\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d/) { |
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$vis->{error} = DBO::Exception->new |
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(TIME => "The value for %s must look like '1999-05-15 23:46:00'.", |
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$col->{name}, $value); |
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return 0; |
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} |
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return 1; |
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}; |
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1; |