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1 | package DBIx::Class::Schema::Loader::SQLite; |
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2 | |
3 | use strict; |
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4 | use base qw/DBIx::Class::Schema::Loader::Generic/; |
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5 | use Text::Balanced qw( extract_bracketed ); |
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6 | use Carp; |
7 | |
8 | =head1 NAME |
9 | |
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10 | DBIx::Class::Schema::Loader::SQLite - DBIx::Class::Schema::Loader SQLite Implementation. |
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11 | |
12 | =head1 SYNOPSIS |
13 | |
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14 | use DBIx::Class::Schema::Loader; |
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15 | |
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16 | # $loader is a DBIx::Class::Schema::Loader::SQLite |
17 | my $loader = DBIx::Class::Schema::Loader->new( |
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18 | dsn => "dbi:SQLite:dbname=/path/to/dbfile", |
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19 | ); |
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20 | |
21 | =head1 DESCRIPTION |
22 | |
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23 | See L<DBIx::Class::Schema::Loader>. |
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24 | |
25 | =cut |
26 | |
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27 | sub _loader_db_classes { |
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28 | return qw/DBIx::Class::PK::Auto::SQLite/; |
29 | } |
30 | |
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31 | # XXX this really needs a re-factor |
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32 | sub _loader_relationships { |
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33 | my $class = shift; |
34 | foreach my $table ( $class->tables ) { |
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35 | |
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36 | my $dbh = $class->storage->dbh; |
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37 | my $sth = $dbh->prepare(<<""); |
38 | SELECT sql FROM sqlite_master WHERE tbl_name = ? |
39 | |
40 | $sth->execute($table); |
41 | my ($sql) = $sth->fetchrow_array; |
42 | $sth->finish; |
43 | |
44 | # Cut "CREATE TABLE ( )" blabla... |
45 | $sql =~ /^[\w\s]+\((.*)\)$/si; |
46 | my $cols = $1; |
47 | |
48 | # strip single-line comments |
49 | $cols =~ s/\-\-.*\n/\n/g; |
50 | |
51 | # temporarily replace any commas inside parens, |
52 | # so we don't incorrectly split on them below |
53 | my $cols_no_bracketed_commas = $cols; |
54 | while ( my $extracted = |
55 | ( extract_bracketed( $cols, "()", "[^(]*" ) )[0] ) |
56 | { |
57 | my $replacement = $extracted; |
58 | $replacement =~ s/,/--comma--/g; |
59 | $replacement =~ s/^\(//; |
60 | $replacement =~ s/\)$//; |
61 | $cols_no_bracketed_commas =~ s/$extracted/$replacement/m; |
62 | } |
63 | |
64 | # Split column definitions |
65 | for my $col ( split /,/, $cols_no_bracketed_commas ) { |
66 | |
67 | # put the paren-bracketed commas back, to help |
68 | # find multi-col fks below |
69 | $col =~ s/\-\-comma\-\-/,/g; |
70 | |
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71 | $col =~ s/^\s*FOREIGN\s+KEY\s*//i; |
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72 | |
73 | # Strip punctuations around key and table names |
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74 | $col =~ s/[\[\]'"]/ /g; |
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75 | $col =~ s/^\s+//gs; |
76 | |
77 | # Grab reference |
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78 | if ( $col =~ /^\((.*)\)\s+REFERENCES\s+(\w+)\s*\((.*)\)/i ) { |
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79 | chomp $col; |
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80 | |
81 | my ($cols, $f_table, $f_cols) = ($1, $2, $3); |
82 | my @cols = map { s/\s*//g; $_ } split(/\s*,\s*/,$cols); |
83 | my @f_cols = map { s/\s*//g; $_ } split(/\s*,\s*/,$f_cols); |
84 | |
85 | die "Mismatched column count in rel for $table => $f_table" |
86 | if @cols != @f_cols; |
87 | |
88 | my $cond = {}; |
89 | for(my $i = 0 ; $i < @cols; $i++) { |
90 | $cond->{$f_cols[$i]} = $cols[$i]; |
91 | } |
92 | |
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93 | eval { $class->_loader_make_relations( $table, $f_table, $cond ) }; |
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94 | warn qq/\# belongs_to_many failed "$@"\n\n/ |
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95 | if $@ && $class->_loader_debug; |
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96 | } |
97 | } |
98 | } |
99 | } |
100 | |
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101 | sub _loader_tables { |
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102 | my $class = shift; |
103 | my $dbh = $class->storage->dbh; |
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104 | my $sth = $dbh->prepare("SELECT * FROM sqlite_master"); |
105 | $sth->execute; |
106 | my @tables; |
107 | while ( my $row = $sth->fetchrow_hashref ) { |
108 | next unless lc( $row->{type} ) eq 'table'; |
109 | push @tables, $row->{tbl_name}; |
110 | } |
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111 | return @tables; |
112 | } |
113 | |
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114 | sub _loader_table_info { |
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115 | my ( $class, $table ) = @_; |
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116 | |
117 | # find all columns. |
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118 | my $dbh = $class->storage->dbh; |
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119 | my $sth = $dbh->prepare("PRAGMA table_info('$table')"); |
120 | $sth->execute(); |
121 | my @columns; |
122 | while ( my $row = $sth->fetchrow_hashref ) { |
123 | push @columns, $row->{name}; |
124 | } |
125 | $sth->finish; |
126 | |
127 | # find primary key. so complex ;-( |
128 | $sth = $dbh->prepare(<<'SQL'); |
129 | SELECT sql FROM sqlite_master WHERE tbl_name = ? |
130 | SQL |
131 | $sth->execute($table); |
132 | my ($sql) = $sth->fetchrow_array; |
133 | $sth->finish; |
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134 | my ($primary) = $sql =~ m/ |
135 | (?:\(|\,) # either a ( to start the definition or a , for next |
136 | \s* # maybe some whitespace |
137 | (\w+) # the col name |
138 | [^,]* # anything but the end or a ',' for next column |
139 | PRIMARY\sKEY/sxi; |
140 | my @pks; |
141 | |
142 | if ($primary) { |
143 | @pks = ($primary); |
144 | } |
145 | else { |
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146 | my ($pks) = $sql =~ m/PRIMARY\s+KEY\s*\(\s*([^)]+)\s*\)/i; |
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147 | @pks = split( m/\s*\,\s*/, $pks ) if $pks; |
148 | } |
149 | return ( \@columns, \@pks ); |
150 | } |
151 | |
152 | =head1 SEE ALSO |
153 | |
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154 | L<DBIx::Schema::Class::Loader> |
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155 | |
156 | =cut |
157 | |
158 | 1; |