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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 warnings; |
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5 | use base qw/DBIx::Class::Schema::Loader::Generic/; |
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6 | |
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7 | use Text::Balanced qw( extract_bracketed ); |
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8 | |
9 | =head1 NAME |
10 | |
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11 | DBIx::Class::Schema::Loader::SQLite - DBIx::Class::Schema::Loader SQLite Implementation. |
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12 | |
13 | =head1 SYNOPSIS |
14 | |
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15 | use DBIx::Class::Schema::Loader; |
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16 | |
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17 | # $loader is a DBIx::Class::Schema::Loader::SQLite |
18 | my $loader = DBIx::Class::Schema::Loader->new( |
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19 | dsn => "dbi:SQLite:dbname=/path/to/dbfile", |
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20 | ); |
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21 | |
22 | =head1 DESCRIPTION |
23 | |
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24 | See L<DBIx::Class::Schema::Loader>. |
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25 | |
26 | =cut |
27 | |
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28 | sub _db_classes { |
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29 | return qw/DBIx::Class::PK::Auto::SQLite/; |
30 | } |
31 | |
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32 | # XXX this really needs a re-factor |
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33 | sub _load_relationships { |
34 | my $self = shift; |
35 | foreach my $table ( $self->tables ) { |
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36 | |
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37 | my $dbh = $self->schema->storage->dbh; |
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38 | my $sth = $dbh->prepare(<<""); |
39 | SELECT sql FROM sqlite_master WHERE tbl_name = ? |
40 | |
41 | $sth->execute($table); |
42 | my ($sql) = $sth->fetchrow_array; |
43 | $sth->finish; |
44 | |
45 | # Cut "CREATE TABLE ( )" blabla... |
46 | $sql =~ /^[\w\s]+\((.*)\)$/si; |
47 | my $cols = $1; |
48 | |
49 | # strip single-line comments |
50 | $cols =~ s/\-\-.*\n/\n/g; |
51 | |
52 | # temporarily replace any commas inside parens, |
53 | # so we don't incorrectly split on them below |
54 | my $cols_no_bracketed_commas = $cols; |
55 | while ( my $extracted = |
56 | ( extract_bracketed( $cols, "()", "[^(]*" ) )[0] ) |
57 | { |
58 | my $replacement = $extracted; |
59 | $replacement =~ s/,/--comma--/g; |
60 | $replacement =~ s/^\(//; |
61 | $replacement =~ s/\)$//; |
62 | $cols_no_bracketed_commas =~ s/$extracted/$replacement/m; |
63 | } |
64 | |
65 | # Split column definitions |
66 | for my $col ( split /,/, $cols_no_bracketed_commas ) { |
67 | |
68 | # put the paren-bracketed commas back, to help |
69 | # find multi-col fks below |
70 | $col =~ s/\-\-comma\-\-/,/g; |
71 | |
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72 | $col =~ s/^\s*FOREIGN\s+KEY\s*//i; |
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73 | |
74 | # Strip punctuations around key and table names |
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75 | $col =~ s/[\[\]'"]/ /g; |
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76 | $col =~ s/^\s+//gs; |
77 | |
78 | # Grab reference |
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79 | chomp $col; |
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80 | next if $col !~ /^(.*)\s+REFERENCES\s+(\w+) (?: \s* \( (.*) \) )? /ix; |
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81 | |
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82 | my ($cols, $f_table, $f_cols) = ($1, $2, $3); |
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83 | |
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84 | if($cols =~ /^\(/) { # Table-level |
85 | $cols =~ s/^\(\s*//; |
86 | $cols =~ s/\s*\)$//; |
87 | } |
88 | else { # Inline |
89 | $cols =~ s/\s+.*$//; |
90 | } |
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91 | |
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92 | my $cond; |
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93 | |
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94 | if($f_cols) { |
95 | my @cols = map { s/\s*//g; $_ } split(/\s*,\s*/,$cols); |
96 | my @f_cols = map { s/\s*//g; $_ } split(/\s*,\s*/,$f_cols); |
97 | die "Mismatched column count in rel for $table => $f_table" |
98 | if @cols != @f_cols; |
99 | $cond = {}; |
100 | for(my $i = 0 ; $i < @cols; $i++) { |
101 | $cond->{$f_cols[$i]} = $cols[$i]; |
102 | } |
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103 | eval { $self->_make_cond_rel( $table, $f_table, $cond ) }; |
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104 | } |
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105 | else { |
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106 | eval { $self->_make_simple_rel( $table, $f_table, $cols ) }; |
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107 | } |
108 | |
109 | warn qq/\# belongs_to_many failed "$@"\n\n/ |
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110 | if $@ && $self->debug; |
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111 | } |
112 | } |
113 | } |
114 | |
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115 | sub _tables { |
116 | my $self = shift; |
117 | my $dbh = $self->schema->storage->dbh; |
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118 | my $sth = $dbh->prepare("SELECT * FROM sqlite_master"); |
119 | $sth->execute; |
120 | my @tables; |
121 | while ( my $row = $sth->fetchrow_hashref ) { |
122 | next unless lc( $row->{type} ) eq 'table'; |
123 | push @tables, $row->{tbl_name}; |
124 | } |
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125 | return @tables; |
126 | } |
127 | |
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128 | sub _table_info { |
129 | my ( $self, $table ) = @_; |
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130 | |
131 | # find all columns. |
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132 | my $dbh = $self->schema->storage->dbh; |
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133 | my $sth = $dbh->prepare("PRAGMA table_info('$table')"); |
134 | $sth->execute(); |
135 | my @columns; |
136 | while ( my $row = $sth->fetchrow_hashref ) { |
137 | push @columns, $row->{name}; |
138 | } |
139 | $sth->finish; |
140 | |
141 | # find primary key. so complex ;-( |
142 | $sth = $dbh->prepare(<<'SQL'); |
143 | SELECT sql FROM sqlite_master WHERE tbl_name = ? |
144 | SQL |
145 | $sth->execute($table); |
146 | my ($sql) = $sth->fetchrow_array; |
147 | $sth->finish; |
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148 | my ($primary) = $sql =~ m/ |
149 | (?:\(|\,) # either a ( to start the definition or a , for next |
150 | \s* # maybe some whitespace |
151 | (\w+) # the col name |
152 | [^,]* # anything but the end or a ',' for next column |
153 | PRIMARY\sKEY/sxi; |
154 | my @pks; |
155 | |
156 | if ($primary) { |
157 | @pks = ($primary); |
158 | } |
159 | else { |
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160 | my ($pks) = $sql =~ m/PRIMARY\s+KEY\s*\(\s*([^)]+)\s*\)/i; |
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161 | @pks = split( m/\s*\,\s*/, $pks ) if $pks; |
162 | } |
163 | return ( \@columns, \@pks ); |
164 | } |
165 | |
166 | =head1 SEE ALSO |
167 | |
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168 | L<DBIx::Schema::Class::Loader> |
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169 | |
170 | =cut |
171 | |
172 | 1; |