NAME

REST::Neo4p::Constraint::Property - Neo4j Property Constraints

SYNOPSIS

# use REST::Neo4p::Constrain, it's nicer

$npc = REST::Neo4p::Constraint::NodeProperty->new(
  'soldier' => { _condition => 'all',
                 _priority => 1,
                 name => '',
                 rank => [],
                 serial_number => qr/^[0-9]+$/,
                 army_of => 'one' }
 );

$rpc = REST::Neo4p::Constraint::RelationshipProperty->new(
 'position' => { _condition => 'only',
                 position => qr/[0-9]+/ }
 );

DESCRIPTION

REST::Neo4p::Constraint::NodeProperty and REST::Neo4p::Constraint::RelationshipProperty are classes that represent constraints on the presence and values of Node and Relationship entities.

Constraint hash specification:

 { 
   _condition => constraint_conditions, # ('all'|'only'|'none')
   _relationship_type => <relationship type>,
   _priority => <integer priority>,
   prop_0 => [], # may have, no constraint
   prop_1 => [<string|regexp>], # may have, if present must meet 
   prop_2 => '', # must have, no constraint
   prop_3 => 'value', # must have, value must eq 'value'
   prop_4 => qr/.alue/, # must have, value must match qr/.alue/,
   prop_5 => qr/^value1|value2|value3$/ # regexp for enumerations
}

METHODS

new()

$np = REST::Neo4p::Constraint::NodeProperty->new(
        $tag => $constraint_hash
      );

$rp = REST::Neo4p::Constraint::RelationshipProperty->new(
        $tag => $constraint_hash
      );

add_constraint()

$np->add_constraint( optional_accessory => [qw(tie ascot boutonniere)] );

remove_constraint()

$np->remove_constraint( 'unneeded_property' );

tag()

Returns the constraint tag.

type()

Returns the constraint type ('node_property' or 'relationship_property').

condition()

set_condition()

Set/get 'all', 'only', 'none' for a given property constraint. See REST::Neo4p::Constrain.

priority()

set_priority()

Constraints with higher priority will be checked before constraints with lower priority by validate_properties().

constraints()

Returns the internal constraint spec hashref.

validate()

$c->validate( $node_object )
$c->validate( $relationship_object )
$c->validate( { name => 'Steve', instrument => 'banjo } );

Returns true if the item meets the constraint, false if not.

SEE ALSO

REST::Neo4p, REST::Neo4p::Node, REST::Neo4p::Relationship, REST::Neo4p::Constraint, REST::Neo4p::Constraint::Relationship, REST::Neo4p::Constraint::RelationshipType.

AUTHOR

Mark A. Jensen
CPAN ID: MAJENSEN
majensen -at- cpan -dot- org

LICENSE

Copyright (c) 2012-2021 Mark A. Jensen. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.