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1 | package DBIx::Class::Schema::Loader::DBI; |
2 | |
3 | use strict; |
4 | use warnings; |
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5 | use base qw/DBIx::Class::Schema::Loader::Base/; |
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6 | use Class::C3; |
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7 | use Carp::Clan qw/^DBIx::Class/; |
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8 | use UNIVERSAL::require; |
9 | |
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10 | our $VERSION = '0.03999_01'; |
11 | |
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12 | =head1 NAME |
13 | |
14 | DBIx::Class::Schema::Loader::DBI - DBIx::Class::Schema::Loader DBI Implementation. |
15 | |
16 | =head1 SYNOPSIS |
17 | |
18 | See L<DBIx::Class::Schema::Loader::Base> |
19 | |
20 | =head1 DESCRIPTION |
21 | |
22 | This is the base class for L<DBIx::Class::Schema::Loader::Base> classes for |
23 | DBI-based storage backends, and implements the common functionality between them. |
24 | |
25 | See L<DBIx::Class::Schema::Loader::Base> for the available options. |
26 | |
27 | =head1 METHODS |
28 | |
29 | =head2 new |
30 | |
31 | Overlays L<DBIx::Class::Schema::Loader::Base/new> to do some DBI-specific |
32 | things. |
33 | |
34 | =cut |
35 | |
36 | sub new { |
37 | my $self = shift->next::method(@_); |
38 | |
39 | # rebless to vendor-specific class if it exists and loads |
40 | my $dbh = $self->schema->storage->dbh; |
41 | my $driver = $dbh->{Driver}->{Name}; |
42 | my $subclass = 'DBIx::Class::Schema::Loader::DBI::' . $driver; |
43 | $subclass->require; |
44 | if($@ && $@ !~ /^Can't locate /) { |
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45 | croak "Failed to require $subclass: $@"; |
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46 | } |
47 | elsif(!$@) { |
48 | bless $self, "DBIx::Class::Schema::Loader::DBI::${driver}"; |
49 | } |
50 | |
51 | # Set up the default quoting character and name seperators |
52 | $self->{_quoter} = $self->schema->storage->sql_maker->quote_char |
53 | || $dbh->get_info(29) |
54 | || q{"}; |
55 | |
56 | $self->{_namesep} = $self->schema->storage->sql_maker->name_sep |
57 | || $dbh->get_info(41) |
58 | || q{.}; |
59 | |
60 | # For our usage as regex matches, concatenating multiple quoter |
61 | # values works fine (e.g. s/\Q<>\E// if quoter was [ '<', '>' ]) |
62 | if( ref $self->{_quoter} eq 'ARRAY') { |
63 | $self->{_quoter} = join(q{}, @{$self->{_quoter}}); |
64 | } |
65 | |
66 | $self->_setup; |
67 | |
68 | $self; |
69 | } |
70 | |
71 | # Override this in vendor modules to do things at the end of ->new() |
72 | sub _setup { } |
73 | |
74 | # Returns an array of table names |
75 | sub _tables_list { |
76 | my $self = shift; |
77 | |
78 | my $dbh = $self->schema->storage->dbh; |
79 | my @tables = $dbh->tables(undef, $self->db_schema, '%', '%'); |
80 | s/\Q$self->{_quoter}\E//g for @tables; |
81 | s/^.*\Q$self->{_namesep}\E// for @tables; |
82 | |
83 | return @tables; |
84 | } |
85 | |
86 | # Returns an arrayref of column names |
87 | sub _table_columns { |
88 | my ($self, $table) = @_; |
89 | |
90 | my $dbh = $self->schema->storage->dbh; |
91 | |
92 | if($self->{db_schema}) { |
93 | $table = $self->{db_schema} . $self->{_namesep} . $table; |
94 | } |
95 | |
96 | my $sth = $dbh->prepare("SELECT * FROM $table WHERE 1=0"); |
97 | $sth->execute; |
98 | return \@{$sth->{NAME_lc}}; |
99 | } |
100 | |
101 | # Returns arrayref of pk col names |
102 | sub _table_pk_info { |
103 | my ( $self, $table ) = @_; |
104 | |
105 | my $dbh = $self->schema->storage->dbh; |
106 | |
107 | my @primary = map { lc } $dbh->primary_key('', $self->db_schema, $table); |
108 | s/\Q$self->{_quoter}\E//g for @primary; |
109 | |
110 | return \@primary; |
111 | } |
112 | |
113 | # Override this for uniq info |
114 | sub _table_uniq_info { |
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115 | warn "No UNIQUE constraint information can be gathered for this vendor"; |
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116 | return []; |
117 | } |
118 | |
119 | # Find relationships |
120 | sub _table_fk_info { |
121 | my ($self, $table) = @_; |
122 | |
123 | my $dbh = $self->schema->storage->dbh; |
124 | my $sth = $dbh->foreign_key_info( '', '', '', '', |
125 | $self->db_schema, $table ); |
126 | return [] if !$sth; |
127 | |
128 | my %rels; |
129 | |
130 | my $i = 1; # for unnamed rels, which hopefully have only 1 column ... |
131 | while(my $raw_rel = $sth->fetchrow_arrayref) { |
132 | my $uk_tbl = $raw_rel->[2]; |
133 | my $uk_col = lc $raw_rel->[3]; |
134 | my $fk_col = lc $raw_rel->[7]; |
135 | my $relid = ($raw_rel->[11] || ( "__dcsld__" . $i++ )); |
136 | $uk_tbl =~ s/\Q$self->{_quoter}\E//g; |
137 | $uk_col =~ s/\Q$self->{_quoter}\E//g; |
138 | $fk_col =~ s/\Q$self->{_quoter}\E//g; |
139 | $relid =~ s/\Q$self->{_quoter}\E//g; |
140 | $rels{$relid}->{tbl} = $uk_tbl; |
141 | $rels{$relid}->{cols}->{$uk_col} = $fk_col; |
142 | } |
143 | |
144 | my @rels; |
145 | foreach my $relid (keys %rels) { |
146 | push(@rels, { |
147 | remote_columns => [ keys %{$rels{$relid}->{cols}} ], |
148 | local_columns => [ values %{$rels{$relid}->{cols}} ], |
149 | remote_table => $rels{$relid}->{tbl}, |
150 | }); |
151 | } |
152 | |
153 | return \@rels; |
154 | } |
155 | |
156 | =head1 SEE ALSO |
157 | |
158 | L<DBIx::Class::Schema::Loader> |
159 | |
160 | =cut |
161 | |
162 | 1; |