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1 | package DBIx::Class::Schema::Loader::DBI::SQLite; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use base qw/DBIx::Class::Schema::Loader::DBI/; |
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6 | use Carp::Clan qw/^DBIx::Class/; |
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7 | use Text::Balanced qw( extract_bracketed ); |
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8 | use Class::C3; |
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9 | |
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10 | our $VERSION = '0.04004'; |
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11 | |
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12 | =head1 NAME |
13 | |
14 | DBIx::Class::Schema::Loader::DBI::SQLite - DBIx::Class::Schema::Loader::DBI SQLite Implementation. |
15 | |
16 | =head1 SYNOPSIS |
17 | |
18 | package My::Schema; |
19 | use base qw/DBIx::Class::Schema::Loader/; |
20 | |
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21 | __PACKAGE__->loader_options( debug => 1 ); |
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22 | |
23 | 1; |
24 | |
25 | =head1 DESCRIPTION |
26 | |
27 | See L<DBIx::Class::Schema::Loader::Base>. |
28 | |
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29 | =head1 METHODS |
30 | |
31 | =head2 rescan |
32 | |
33 | SQLite will fail all further commands on a connection if the |
34 | underlying schema has been modified. Therefore, any runtime |
35 | changes requiring C<rescan> also require us to re-connect |
36 | to the database. The C<rescan> method here handles that |
37 | reconnection for you, but beware that this must occur for |
38 | any other open sqlite connections as well. |
39 | |
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40 | =cut |
41 | |
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42 | sub rescan { |
43 | my ($self, $schema) = @_; |
44 | |
45 | $schema->storage->disconnect if $schema->storage; |
46 | $self->next::method($schema); |
47 | } |
48 | |
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49 | # XXX this really needs a re-factor |
50 | sub _sqlite_parse_table { |
51 | my ($self, $table) = @_; |
52 | |
53 | my @rels; |
54 | my @uniqs; |
55 | |
56 | my $dbh = $self->schema->storage->dbh; |
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57 | my $sth = $self->{_cache}->{sqlite_master} |
58 | ||= $dbh->prepare(q{SELECT sql FROM sqlite_master WHERE tbl_name = ?}); |
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59 | |
60 | $sth->execute($table); |
61 | my ($sql) = $sth->fetchrow_array; |
62 | $sth->finish; |
63 | |
64 | # Cut "CREATE TABLE ( )" blabla... |
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65 | $sql =~ /^[\w\s']+\((.*)\)$/si; |
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66 | my $cols = $1; |
67 | |
68 | # strip single-line comments |
69 | $cols =~ s/\-\-.*\n/\n/g; |
70 | |
71 | # temporarily replace any commas inside parens, |
72 | # so we don't incorrectly split on them below |
73 | my $cols_no_bracketed_commas = $cols; |
74 | while ( my $extracted = |
75 | ( extract_bracketed( $cols, "()", "[^(]*" ) )[0] ) |
76 | { |
77 | my $replacement = $extracted; |
78 | $replacement =~ s/,/--comma--/g; |
79 | $replacement =~ s/^\(//; |
80 | $replacement =~ s/\)$//; |
81 | $cols_no_bracketed_commas =~ s/$extracted/$replacement/m; |
82 | } |
83 | |
84 | # Split column definitions |
85 | for my $col ( split /,/, $cols_no_bracketed_commas ) { |
86 | |
87 | # put the paren-bracketed commas back, to help |
88 | # find multi-col fks below |
89 | $col =~ s/\-\-comma\-\-/,/g; |
90 | |
91 | $col =~ s/^\s*FOREIGN\s+KEY\s*//i; |
92 | |
93 | # Strip punctuations around key and table names |
94 | $col =~ s/[\[\]'"]/ /g; |
95 | $col =~ s/^\s+//gs; |
96 | |
97 | # Grab reference |
98 | chomp $col; |
99 | |
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100 | if($col =~ /^(.*)\s+UNIQUE/i) { |
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101 | my $colname = $1; |
102 | $colname =~ s/\s+.*$//; |
103 | push(@uniqs, [ "${colname}_unique" => [ lc $colname ] ]); |
104 | } |
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105 | elsif($col =~/^\s*UNIQUE\s*\(\s*(.*)\)/i) { |
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106 | my $cols = $1; |
107 | $cols =~ s/\s+$//; |
108 | my @cols = map { lc } split(/\s*,\s*/, $cols); |
109 | my $name = join(q{_}, @cols) . '_unique'; |
110 | push(@uniqs, [ $name => \@cols ]); |
111 | } |
112 | |
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113 | next if $col !~ /^(.*\S)\s+REFERENCES\s+(\w+) (?: \s* \( (.*) \) )? /ix; |
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114 | |
115 | my ($cols, $f_table, $f_cols) = ($1, $2, $3); |
116 | |
117 | if($cols =~ /^\(/) { # Table-level |
118 | $cols =~ s/^\(\s*//; |
119 | $cols =~ s/\s*\)$//; |
120 | } |
121 | else { # Inline |
122 | $cols =~ s/\s+.*$//; |
123 | } |
124 | |
125 | my @cols = map { s/\s*//g; lc $_ } split(/\s*,\s*/,$cols); |
126 | my $rcols; |
127 | if($f_cols) { |
128 | my @f_cols = map { s/\s*//g; lc $_ } split(/\s*,\s*/,$f_cols); |
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129 | croak "Mismatched column count in rel for $table => $f_table" |
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130 | if @cols != @f_cols; |
131 | $rcols = \@f_cols; |
132 | } |
133 | push(@rels, { |
134 | local_columns => \@cols, |
135 | remote_columns => $rcols, |
136 | remote_table => $f_table, |
137 | }); |
138 | } |
139 | |
140 | return { rels => \@rels, uniqs => \@uniqs }; |
141 | } |
142 | |
143 | sub _table_fk_info { |
144 | my ($self, $table) = @_; |
145 | |
146 | $self->{_sqlite_parse_data}->{$table} ||= |
147 | $self->_sqlite_parse_table($table); |
148 | |
149 | return $self->{_sqlite_parse_data}->{$table}->{rels}; |
150 | } |
151 | |
152 | sub _table_uniq_info { |
153 | my ($self, $table) = @_; |
154 | |
155 | $self->{_sqlite_parse_data}->{$table} ||= |
156 | $self->_sqlite_parse_table($table); |
157 | |
158 | return $self->{_sqlite_parse_data}->{$table}->{uniqs}; |
159 | } |
160 | |
161 | sub _tables_list { |
162 | my $self = shift; |
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163 | |
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164 | my $dbh = $self->schema->storage->dbh; |
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165 | my $sth = $dbh->prepare("SELECT * FROM sqlite_master"); |
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166 | $sth->execute; |
167 | my @tables; |
168 | while ( my $row = $sth->fetchrow_hashref ) { |
169 | next unless lc( $row->{type} ) eq 'table'; |
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170 | next if $row->{tbl_name} =~ /^sqlite_/; |
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171 | push @tables, $row->{tbl_name}; |
172 | } |
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173 | $sth->finish; |
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174 | return @tables; |
175 | } |
176 | |
177 | =head1 SEE ALSO |
178 | |
179 | L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>, |
180 | L<DBIx::Class::Schema::Loader::DBI> |
181 | |
182 | =cut |
183 | |
184 | 1; |