NAME
    Class::DBI::GraphEasy - Graph Class::DBI classes automatically.

SYNOPSIS
        my $graph = Class::DBI::GraphEasy->new(
                                            classes => ['Music::Artist','Music::CD'], 
                                            prettify => 1, 
                                            colorize => 1, 
                                            show_columns => 1, 
                                            no_recursion => 0,
                                    ); #returns a Graph::Easy object
        
            print $graph->as_html_file(); #render $graph as html for rapid graphing
            my $graphviz = $graph->as_graphviz(); #render as graphviz for best results

DESCRIPTION
    This module integrates Class::DBI and Graph::Easy. It is designed to
    automatically generate diagrams to illustrate the given Class::DBI
    classes. By default, it traverses both 'has a' and 'has many'
    relationships to discovery foreign classes recusively until not further
    relationships are found.

METHODS
    The public method is new().

  new()
    It returns an Graph::Easy object or false when failed.

    The following is a description of possible parameters.

    classes => \@your_cdbi_classes
        This paramater is mandatory. It takes an arrayref of the Class::DBI
        classes (package names) that you would like to graph. The list is
        NOT restricted by namespaces.

    prettify => 0 | 1
        Defaulted to 0. If set to 1, the module will prettify your class and
        attribute (column) labels, for example, showing "Wonderful Class"
        instead of "some::wonderful_class". Please note that the actual
        names of the class nodes are NOT changed. To prevent naming
        collisions, attributes node names are concatenated with their class
        name using a hyphen, i.e. "Class::Name-Attribute_Name". Please refer
        to the Graph::Easy Manual for controlling per node or per edge
        attributes.

    colorize => 0 | 1
        Defaulted to 0. If set to 1, it will use a default color style.

    show_columns => 0 | 1
        Defaulted to 0. It controls whether to graph the attributes
        (columns) of the given Class::DBI classes. The module automatically
        hides primary key columns and foreign key columns founded in 'has a'
        relationships.

    no_recursion => 0 | 1
        Defaulted to 0. If set to 1, the module will NOT traverse
        relationships automatically to discovery foreign classes.

    flow => north | south | west | east
        Defaulted to east. It is a shortcut to the flow directions of a
        graph suppported by Graph::Easy.

    arrowstyle => open | closed | filled | none
        Defaulted to open. It is a shortcut to control the arrowstyles
        supported by Graph::Easy. It applies to all edges between classes.
        This option is handy since not all arrow styles are rendered nicely
        as html.

    class_shape => circle | diamond | ellipse ...
        Defaulted to rect (rectangle). It is a shortcut to control the shape
        of all classes. Please refer to the Graph::Easy Manual for all
        possible shapes.

    column_shape => circle | diamond | ellipse ...
        Defaulted to circle. It is a shortcut to control the shape of all
        attributes (columns). Please refer to the Graph::Easy Manual for all
        possible shapes.

  _graph_it()
    This is an internal API to construct the graph.

  _set_node()
    This is an internal API for setting attributes of class nodes.

  _prettify()
    This is an internal API to prettify class labels and attribute (column)
    labels.

  _show_columns()
    This is an internal API for graphing attributes (columns).

SEE ALSO
    Class::DBI, Graph::Easy.

AUTHOR
    Xufeng (Danny) Liang danny@scm.uws.edu.au

COPYRIGHT & LICENSE
    Copyright 2006 Xufeng (Danny) Liang, All Rights Reserved.

    This program is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.