X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FSQLite.pm;h=6ca2cf5d35b12881b11a0e27e5e81d0055f0bf48;hb=632d1e0fcec8dd0b2ba1c2f9f616bf92aa22e2b3;hp=f7977bb577f4b309023382763e17b4ed9eef1995;hpb=243d702ea2d1350e9c08d52eb84cdde745913452;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/SQLite.pm b/lib/DBIx/Class/Storage/DBI/SQLite.pm
index f7977bb..6ca2cf5 100644
--- a/lib/DBIx/Class/Storage/DBI/SQLite.pm
+++ b/lib/DBIx/Class/Storage/DBI/SQLite.pm
@@ -6,12 +6,21 @@ use warnings;
 use base qw/DBIx::Class::Storage::DBI/;
 use mro 'c3';
 
-use POSIX 'strftime';
-use File::Copy;
-use File::Spec;
+use DBIx::Class::Carp;
+use Scalar::Util 'looks_like_number';
+use namespace::clean;
+
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::SQLite');
+__PACKAGE__->sql_limit_dialect ('LimitOffset');
+__PACKAGE__->sql_quote_char ('"');
+__PACKAGE__->datetime_parser_type ('DateTime::Format::SQLite');
+
+sub backup {
+
+  require File::Spec;
+  require File::Copy;
+  require POSIX;
 
-sub backup
-{
   my ($self, $dir) = @_;
   $dir ||= './';
 
@@ -23,42 +32,129 @@ sub backup
   {
     $dbname = $1 if($dsn =~ /^dbi:SQLite:(.+)$/i);
   }
-  $self->throw_exception("Cannot determine name of SQLite db file") 
+  $self->throw_exception("Cannot determine name of SQLite db file")
     if(!$dbname || !-f $dbname);
 
 #  print "Found database: $dbname\n";
 #  my $dbfile = file($dbname);
   my ($vol, $dbdir, $file) = File::Spec->splitpath($dbname);
 #  my $file = $dbfile->basename();
-  $file = strftime("%Y-%m-%d-%H_%M_%S", localtime()) . $file; 
+  $file = POSIX::strftime("%Y-%m-%d-%H_%M_%S", localtime()) . $file;
   $file = "B$file" while(-f $file);
 
   mkdir($dir) unless -f $dir;
   my $backupfile = File::Spec->catfile($dir, $file);
 
-  my $res = copy($dbname, $backupfile);
+  my $res = File::Copy::copy($dbname, $backupfile);
   $self->throw_exception("Backup failed! ($!)") if(!$res);
 
   return $backupfile;
 }
 
+sub _exec_svp_begin {
+  my ($self, $name) = @_;
+
+  $self->_dbh->do("SAVEPOINT $name");
+}
+
+sub _exec_svp_release {
+  my ($self, $name) = @_;
+
+  $self->_dbh->do("RELEASE SAVEPOINT $name");
+}
+
+sub _exec_svp_rollback {
+  my ($self, $name) = @_;
+
+  # For some reason this statement changes the value of $dbh->{AutoCommit}, so
+  # we localize it here to preserve the original value.
+  local $self->_dbh->{AutoCommit} = $self->_dbh->{AutoCommit};
+
+  $self->_dbh->do("ROLLBACK TRANSACTION TO SAVEPOINT $name");
+}
+
 sub deployment_statements {
-  my $self = shift;;
+  my $self = shift;
   my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_;
 
   $sqltargs ||= {};
 
-  my $sqlite_version = $self->_get_dbh->{sqlite_version};
+  if (
+    ! exists $sqltargs->{producer_args}{sqlite_version}
+      and
+    my $dver = $self->_server_info->{normalized_dbms_version}
+  ) {
+    $sqltargs->{producer_args}{sqlite_version} = $dver;
+  }
 
-  # numify, SQLT does a numeric comparison
-  $sqlite_version =~ s/^(\d+) \. (\d+) (?: \. (\d+))? .*/${1}.${2}/x;
+  $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
+}
 
-  $sqltargs->{producer_args}{sqlite_version} = $sqlite_version;
+sub bind_attribute_by_data_type {
+  $_[1] =~ /^ (?: int(?:eger)? | (?:tiny|small|medium|big)int ) $/ix
+    ? do { require DBI; DBI::SQL_INTEGER() }
+    : undef
+  ;
+}
 
-  $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
+# DBD::SQLite (at least up to version 1.31 has a bug where it will
+# non-fatally nummify a string value bound as an integer, resulting
+# in insertions of '0' into supposed-to-be-numeric fields
+# Since this can result in severe data inconsistency, remove the
+# bind attr if such a sitation is detected
+#
+# FIXME - when a DBD::SQLite version is released that eventually fixes
+# this sutiation (somehow) - no-op this override once a proper DBD
+# version is detected
+sub _dbi_attrs_for_bind {
+  my ($self, $ident, $bind) = @_;
+  my $bindattrs = $self->next::method($ident, $bind);
+
+  for (0.. $#$bindattrs) {
+    if (
+      defined $bindattrs->[$_]
+        and
+      defined $bind->[$_][1]
+        and
+      $bindattrs->[$_] eq DBI::SQL_INTEGER()
+        and
+      ! looks_like_number ($bind->[$_][1])
+    ) {
+      carp_unique( sprintf (
+        "Non-numeric value supplied for column '%s' despite the numeric datatype",
+        $bind->[$_][0]{dbic_colname} || "# $_"
+      ) );
+      undef $bindattrs->[$_];
+    }
+  }
+
+  return $bindattrs;
 }
 
-sub datetime_parser_type { return "DateTime::Format::SQLite"; } 
+=head2 connect_call_use_foreign_keys
+
+Used as:
+
+    on_connect_call => 'use_foreign_keys'
+
+In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to turn on foreign key
+(including cascading) support for recent versions of SQLite and L<DBD::SQLite>.
+
+Executes:
+
+  PRAGMA foreign_keys = ON 
+
+See L<http://www.sqlite.org/foreignkeys.html> for more information.
+
+=cut
+
+sub connect_call_use_foreign_keys {
+  my $self = shift;
+
+  $self->_do_query(
+    'PRAGMA foreign_keys = ON'
+  );
+}
 
 1;