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1 | package SQL::Translator::Schema::Graph; |
2 | |
3 | use strict; |
4 | |
5 | use Data::Dumper; |
6 | |
7 | use SQL::Translator::Schema::Graph::Node; |
8 | use SQL::Translator::Schema::Graph::Edge; |
9 | use SQL::Translator::Schema::Graph::Port; |
10 | use SQL::Translator::Schema::Graph::CompoundEdge; |
11 | use SQL::Translator::Schema::Graph::HyperEdge; |
12 | |
13 | use constant Node => 'SQL::Translator::Schema::Graph::Node'; |
14 | use constant Edge => 'SQL::Translator::Schema::Graph::Edge'; |
15 | use constant Port => 'SQL::Translator::Schema::Graph::Port'; |
16 | use constant CompoundEdge => 'SQL::Translator::Schema::Graph::CompoundEdge'; |
17 | use constant HyperEdge => 'SQL::Translator::Schema::Graph::HyperEdge'; |
18 | |
19 | use Class::MakeMethods::Template::Hash ( |
20 | 'new --and_then_init' => 'new', |
21 | object => [ |
22 | 'translator' => {class => 'SQL::Translator'}, |
23 | ], |
24 | 'hash' => [ qw( node ) ], |
25 | 'scalar' => [ qw( baseclass ) ], |
26 | 'number --counter' => [ qw( order ) ], |
27 | ); |
28 | |
29 | sub init { |
30 | my $self = shift; |
31 | # |
32 | # build package objects |
33 | # |
34 | foreach my $table ($self->translator->schema->get_tables){ |
35 | die __PACKAGE__." table ".$table->name." doesn't have a primary key!" unless $table->primary_key; |
36 | die __PACKAGE__." table ".$table->name." can't have a composite primary key!" if ($table->primary_key->fields)[1]; |
37 | |
38 | my $node = Node->new(); |
39 | |
40 | $self->node_push($table->name => $node); |
41 | |
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42 | if ($table->is_trivial_link) { $node->is_trivial_link(1); } |
43 | else { $node->is_trivial_link(0); } |
44 | |
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45 | $node->order($self->order_incr()); |
46 | $node->name( $self->translator->format_package_name($table->name) ); |
47 | $node->base( $self->baseclass ); |
48 | $node->table( $table ); |
49 | $node->primary_key( ($table->primary_key->fields)[0] ); |
50 | |
51 | # Primary key may have a differenct accessor method name |
52 | $node->primary_key_accessor( |
53 | defined($self->translator->format_pk_name) |
54 | ? $self->translator->format_pk_name->( $node->name, $node->primary_key ) |
55 | : undef |
56 | ); |
57 | } |
58 | |
59 | foreach my $node ($self->node_values){ |
60 | foreach my $field ($node->table->get_fields){ |
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61 | if (!$field->is_foreign_key && !$field->is_primary_key) { $node->data_fields->{$field->name} = 1; } |
62 | elsif($field->is_foreign_key) { |
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63 | my $that = $self->node($field->foreign_key_reference->reference_table); |
64 | |
65 | #this means we have an incomplete schema |
66 | next unless $that; |
67 | |
68 | my $edge = Edge->new( |
69 | type => 'import', |
70 | thisnode => $node, |
71 | thisfield => $field, |
72 | thatnode => $that, |
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73 | #can you believe this sh*t just to get a field obj? |
74 | thatfield => $self->translator->schema->get_table($field->foreign_key_reference->reference_table)->get_field(($field->foreign_key_reference->reference_fields)[0]) |
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75 | ); |
76 | |
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77 | $node->edgecount($that->name, $node->edgecount($that->name)+1); |
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78 | |
79 | $node->has($that->name, $node->has($that->name)+1); |
80 | $that->many($node->name, $that->many($node->name)+1); |
81 | |
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82 | $that->edgecount($node->name, $that->edgecount($node->name)+1); |
83 | warn $node->name . "\t" . $that->edgecount($node->name); |
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84 | $node->push_edges( $edge ); |
85 | $that->push_edges( $edge->flip ); |
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86 | } |
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87 | } |
88 | } |
89 | |
90 | # |
91 | # type MM relationships |
92 | # |
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93 | #foreach linknode |
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94 | foreach my $lnode (sort $self->node_values){ |
95 | next if $lnode->table->is_data; |
96 | foreach my $inode1 (sort $self->node_values){ |
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97 | #linknode can't link to itself |
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98 | next if $inode1 eq $lnode; |
99 | |
100 | my @inode1_imports = grep { $_->type eq 'import' and $_->thatnode eq $inode1 } $lnode->edges; |
101 | next unless @inode1_imports; |
102 | |
103 | foreach my $inode2 (sort $self->node_values){ |
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104 | #linknode can't link to itself |
105 | next if $inode2 eq $lnode; |
106 | |
107 | #identify tables that import keys to linknode |
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108 | my %i = map {$_->thatnode->name => 1} grep { $_->type eq 'import'} $lnode->edges; |
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109 | |
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110 | if(scalar(keys %i) == 1) { |
111 | } else { |
112 | last if $inode1 eq $inode2; |
113 | } |
114 | |
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115 | my @inode2_imports = grep { $_->type eq 'import' and $_->thatnode eq $inode2 } $lnode->edges; |
116 | next unless @inode2_imports; |
117 | |
118 | my $cedge = CompoundEdge->new(); |
119 | $cedge->via($lnode); |
120 | |
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121 | #warn join ' ', map {$_->thisfield->name} map {$_->flip} $lnode->edges; |
122 | #warn join ' ', map {$_->thisfield->name} $lnode->edges; |
123 | #warn join ' ', map {$_->thisfield->name} map {$_->flip} grep {$_->type eq 'import'} $lnode->edges; |
124 | #warn join ' ', map {$_->thatfield->name} map {$_->flip} grep {$_->type eq 'import'} $lnode->edges; |
125 | $cedge->push_edges( |
126 | map {$_->flip} |
127 | grep {$_->type eq 'import' |
128 | and |
129 | ($_->thatnode eq $inode1 or $_->thatnode eq $inode2) |
130 | } $lnode->edges |
131 | ); |
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132 | |
133 | if(scalar(@inode1_imports) == 1 and scalar(@inode2_imports) == 1){ |
134 | $cedge->type('one2one'); |
135 | |
136 | $inode1->via($inode2->name,$inode1->via($inode2->name)+1); |
137 | $inode2->via($inode1->name,$inode2->via($inode1->name)+1); |
138 | } |
139 | elsif(scalar(@inode1_imports) > 1 and scalar(@inode2_imports) == 1){ |
140 | $cedge->type('many2one'); |
141 | |
142 | $inode1->via($inode2->name,$inode1->via($inode2->name)+1); |
143 | $inode2->via($inode1->name,$inode2->via($inode1->name)+1); |
144 | } |
145 | elsif(scalar(@inode1_imports) == 1 and scalar(@inode2_imports) > 1){ |
146 | #handled above |
147 | } |
148 | elsif(scalar(@inode1_imports) > 1 and scalar(@inode2_imports) > 1){ |
149 | $cedge->type('many2many'); |
150 | |
151 | $inode1->via($inode2->name,$inode1->via($inode2->name)+1); |
152 | $inode2->via($inode1->name,$inode2->via($inode1->name)+1); |
153 | } |
154 | |
155 | $inode1->push_compoundedges($cedge); |
156 | $inode2->push_compoundedges($cedge) unless $inode1 eq $inode2; |
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157 | } |
158 | } |
159 | } |
160 | } |
161 | |
162 | 1; |