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1 | package DBIx::Class::Schema::Loader::DBI; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use base qw/DBIx::Class::Schema::Loader::Base Class::Accessor::Fast/; |
6 | use Class::C3; |
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7 | use Carp::Clan qw/^DBIx::Class/; |
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8 | use UNIVERSAL::require; |
9 | |
10 | =head1 NAME |
11 | |
12 | DBIx::Class::Schema::Loader::DBI - DBIx::Class::Schema::Loader DBI Implementation. |
13 | |
14 | =head1 SYNOPSIS |
15 | |
16 | See L<DBIx::Class::Schema::Loader::Base> |
17 | |
18 | =head1 DESCRIPTION |
19 | |
20 | This is the base class for L<DBIx::Class::Schema::Loader::Base> classes for |
21 | DBI-based storage backends, and implements the common functionality between them. |
22 | |
23 | See L<DBIx::Class::Schema::Loader::Base> for the available options. |
24 | |
25 | =head1 METHODS |
26 | |
27 | =head2 new |
28 | |
29 | Overlays L<DBIx::Class::Schema::Loader::Base/new> to do some DBI-specific |
30 | things. |
31 | |
32 | =cut |
33 | |
34 | sub new { |
35 | my $self = shift->next::method(@_); |
36 | |
37 | # rebless to vendor-specific class if it exists and loads |
38 | my $dbh = $self->schema->storage->dbh; |
39 | my $driver = $dbh->{Driver}->{Name}; |
40 | my $subclass = 'DBIx::Class::Schema::Loader::DBI::' . $driver; |
41 | $subclass->require; |
42 | if($@ && $@ !~ /^Can't locate /) { |
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43 | croak "Failed to require $subclass: $@"; |
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44 | } |
45 | elsif(!$@) { |
46 | bless $self, "DBIx::Class::Schema::Loader::DBI::${driver}"; |
47 | } |
48 | |
49 | # Set up the default quoting character and name seperators |
50 | $self->{_quoter} = $self->schema->storage->sql_maker->quote_char |
51 | || $dbh->get_info(29) |
52 | || q{"}; |
53 | |
54 | $self->{_namesep} = $self->schema->storage->sql_maker->name_sep |
55 | || $dbh->get_info(41) |
56 | || q{.}; |
57 | |
58 | # For our usage as regex matches, concatenating multiple quoter |
59 | # values works fine (e.g. s/\Q<>\E// if quoter was [ '<', '>' ]) |
60 | if( ref $self->{_quoter} eq 'ARRAY') { |
61 | $self->{_quoter} = join(q{}, @{$self->{_quoter}}); |
62 | } |
63 | |
64 | $self->_setup; |
65 | |
66 | $self; |
67 | } |
68 | |
69 | # Override this in vendor modules to do things at the end of ->new() |
70 | sub _setup { } |
71 | |
72 | # Returns an array of table names |
73 | sub _tables_list { |
74 | my $self = shift; |
75 | |
76 | my $dbh = $self->schema->storage->dbh; |
77 | my @tables = $dbh->tables(undef, $self->db_schema, '%', '%'); |
78 | s/\Q$self->{_quoter}\E//g for @tables; |
79 | s/^.*\Q$self->{_namesep}\E// for @tables; |
80 | |
81 | return @tables; |
82 | } |
83 | |
84 | # Returns an arrayref of column names |
85 | sub _table_columns { |
86 | my ($self, $table) = @_; |
87 | |
88 | my $dbh = $self->schema->storage->dbh; |
89 | |
90 | if($self->{db_schema}) { |
91 | $table = $self->{db_schema} . $self->{_namesep} . $table; |
92 | } |
93 | |
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94 | my $sth = $dbh->prepare($self->schema->storage->sql_maker->select($table, undef, \'1 = 0')); |
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95 | $sth->execute; |
96 | return \@{$sth->{NAME_lc}}; |
97 | } |
98 | |
99 | # Returns arrayref of pk col names |
100 | sub _table_pk_info { |
101 | my ( $self, $table ) = @_; |
102 | |
103 | my $dbh = $self->schema->storage->dbh; |
104 | |
105 | my @primary = map { lc } $dbh->primary_key('', $self->db_schema, $table); |
106 | s/\Q$self->{_quoter}\E//g for @primary; |
107 | |
108 | return \@primary; |
109 | } |
110 | |
111 | # Override this for uniq info |
112 | sub _table_uniq_info { |
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113 | warn "No UNIQUE constraint information can be gathered for this vendor"; |
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114 | return []; |
115 | } |
116 | |
117 | # Find relationships |
118 | sub _table_fk_info { |
119 | my ($self, $table) = @_; |
120 | |
121 | my $dbh = $self->schema->storage->dbh; |
122 | my $sth = $dbh->foreign_key_info( '', '', '', '', |
123 | $self->db_schema, $table ); |
124 | return [] if !$sth; |
125 | |
126 | my %rels; |
127 | |
128 | my $i = 1; # for unnamed rels, which hopefully have only 1 column ... |
129 | while(my $raw_rel = $sth->fetchrow_arrayref) { |
130 | my $uk_tbl = $raw_rel->[2]; |
131 | my $uk_col = lc $raw_rel->[3]; |
132 | my $fk_col = lc $raw_rel->[7]; |
133 | my $relid = ($raw_rel->[11] || ( "__dcsld__" . $i++ )); |
134 | $uk_tbl =~ s/\Q$self->{_quoter}\E//g; |
135 | $uk_col =~ s/\Q$self->{_quoter}\E//g; |
136 | $fk_col =~ s/\Q$self->{_quoter}\E//g; |
137 | $relid =~ s/\Q$self->{_quoter}\E//g; |
138 | $rels{$relid}->{tbl} = $uk_tbl; |
139 | $rels{$relid}->{cols}->{$uk_col} = $fk_col; |
140 | } |
141 | |
142 | my @rels; |
143 | foreach my $relid (keys %rels) { |
144 | push(@rels, { |
145 | remote_columns => [ keys %{$rels{$relid}->{cols}} ], |
146 | local_columns => [ values %{$rels{$relid}->{cols}} ], |
147 | remote_table => $rels{$relid}->{tbl}, |
148 | }); |
149 | } |
150 | |
151 | return \@rels; |
152 | } |
153 | |
154 | =head1 SEE ALSO |
155 | |
156 | L<DBIx::Class::Schema::Loader> |
157 | |
158 | =cut |
159 | |
160 | 1; |