X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI.pm;h=b3959324139c0d12e7e5d14fd2941e0e98793b7c;hb=0eb27426ceda801e6e872dc09eba34833fc0aaf0;hp=cb55d20fb3c907823cf53a9de5be06c2f9bd06ba;hpb=a3628767c199b15432385b6ce369009cabd5044a;p=dbsrgits%2FDBIx-Class.git diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm index cb55d20..b395932 100644 --- a/lib/DBIx/Class/Storage/DBI.pm +++ b/lib/DBIx/Class/Storage/DBI.pm @@ -5,6 +5,7 @@ use base 'DBIx::Class::Storage'; use strict; use warnings; +use Carp::Clan qw/^DBIx::Class/; use DBI; use SQL::Abstract::Limit; use DBIx::Class::Storage::DBI::Cursor; @@ -13,11 +14,18 @@ use Scalar::Util qw/blessed weaken/; __PACKAGE__->mk_group_accessors('simple' => qw/_connect_info _dbi_connect_info _dbh _sql_maker _sql_maker_opts - _conn_pid _conn_tid disable_sth_caching on_connect_do - on_disconnect_do transaction_depth unsafe _dbh_autocommit - auto_savepoint/ + _conn_pid _conn_tid transaction_depth _dbh_autocommit savepoints/ ); +# the values for these accessors are picked out (and deleted) from +# the attribute hashref passed to connect_info +my @storage_options = qw/ + on_connect_do on_disconnect_do disable_sth_caching unsafe auto_savepoint +/; +__PACKAGE__->mk_group_accessors('simple' => @storage_options); + + +# default cursor class, overridable in connect_info attributes __PACKAGE__->cursor_class('DBIx::Class::Storage::DBI::Cursor'); __PACKAGE__->mk_group_accessors('inherited' => qw/sql_maker_class/); @@ -25,7 +33,8 @@ __PACKAGE__->sql_maker_class('DBIC::SQL::Abstract'); BEGIN { -package DBIC::SQL::Abstract; # Would merge upstream, but nate doesn't reply :( +package # Hide from PAUSE + DBIC::SQL::Abstract; # Would merge upstream, but nate doesn't reply :( use base qw/SQL::Abstract::Limit/; @@ -77,7 +86,12 @@ sub _find_syntax { sub select { my ($self, $table, $fields, $where, $order, @rest) = @_; - $table = $self->_quote($table) unless ref($table); + if (ref $table eq 'SCALAR') { + $table = $$table; + } + elsif (not ref $table) { + $table = $self->_quote($table); + } local $self->{rownum_hack_count} = 1 if (defined $rest[0] && $self->{limit_dialect} eq 'RowNum'); @rest = (-1) unless defined $rest[0]; @@ -313,6 +327,15 @@ DBIx::Class::Storage::DBI - DBI storage handler =head1 SYNOPSIS + my $schema = MySchema->connect('dbi:SQLite:my.db'); + + $schema->storage->debug(1); + $schema->dbh_do("DROP TABLE authors"); + + $schema->resultset('Book')->search({ + written_on => $schema->storage->datetime_parser(DateTime->now) + }); + =head1 DESCRIPTION This class represents the connection to an RDBMS via L. See @@ -328,6 +351,7 @@ sub new { $new->transaction_depth(0); $new->_sql_maker_opts({}); + $new->{savepoints} = []; $new->{_in_dbh_do} = 0; $new->{_dbh_gen} = 0; @@ -336,27 +360,80 @@ sub new { =head2 connect_info -The arguments of C are always a single array reference. +This method is normally called by L, which +encapsulates its argument list in an arrayref before passing them here. + +The argument list may contain: -This is normally accessed via L, which -encapsulates its argument list in an arrayref before calling -C here. +=over -The arrayref can either contain the same set of arguments one would -normally pass to L, or a lone code reference which returns -a connected database handle. Please note that the L docs -recommend that you always explicitly set C to either -C<0> or C<1>. L further recommends that it be set -to C<1>, and that you perform transactions via our L -method. L will set it to C<1> if you do not do explicitly -set it to zero. This is the default for most DBDs. See below for more -details. +=item * -In either case, if the final argument in your connect_info happens -to be a hashref, C will look there for several -connection-specific options: +The same 4-element argument set one would normally pass to +L, optionally followed by +L +recognized by DBIx::Class: -=over 4 + $connect_info_args = [ $dsn, $user, $password, \%dbi_attributes?, \%extra_attributes? ]; + +=item * + +A single code reference which returns a connected +L optionally followed by +L recognized +by DBIx::Class: + + $connect_info_args = [ sub { DBI->connect (...) }, \%extra_attributes? ]; + +=item * + +A single hashref with all the attributes and the dsn/user/password +mixed together: + + $connect_info_args = [{ + dsn => $dsn, + user => $user, + password => $pass, + %dbi_attributes, + %extra_attributes, + }]; + +This is particularly useful for L based applications, allowing the +following config (L style): + + + schema_class App::DB + + dsn dbi:mysql:database=test + user testuser + password TestPass + AutoCommit 1 + + + +=back + +Please note that the L docs recommend that you always explicitly +set C to either I<0> or I<1>. L further +recommends that it be set to I<1>, and that you perform transactions +via our L method. L will set it +to I<1> if you do not do explicitly set it to zero. This is the default +for most DBDs. See L for details. + +=head3 DBIx::Class specific connection attributes + +In addition to the standard L +L attributes, DBIx::Class recognizes +the following connection options. These options can be mixed in with your other +L connection attributes, or placed in a seperate hashref +(C<\%extra_attributes>) as shown above. + +Every time C is invoked, any previous settings for +these options will be cleared before setting the new ones, regardless of +whether any options are specified in the new C. + + +=over =item on_connect_do @@ -379,10 +456,10 @@ array reference, its return value is ignored. =item on_disconnect_do -Takes arguments in the same form as L and executes them +Takes arguments in the same form as L and executes them immediately before disconnecting from the database. -Note, this only runs if you explicitly call L on the +Note, this only runs if you explicitly call L on the storage object. =item disable_sth_caching @@ -394,26 +471,31 @@ statement handles via L. Sets the limit dialect. This is useful for JDBC-bridge among others where the remote SQL-dialect cannot be determined by the name of the -driver alone. +driver alone. See also L. =item quote_char Specifies what characters to use to quote table and column names. If -you use this you will want to specify L as well. +you use this you will want to specify L as well. -quote_char expects either a single character, in which case is it is placed -on either side of the table/column, or an arrayref of length 2 in which case the -table/column name is placed between the elements. +C expects either a single character, in which case is it +is placed on either side of the table/column name, or an arrayref of length +2 in which case the table/column name is placed between the elements. -For example under MySQL you'd use C '`'>, and user SQL Server you'd -use C [qw/[ ]/]>. +For example under MySQL you should use C<< quote_char => '`' >>, and for +SQL Server you should use C<< quote_char => [qw/[ ]/] >>. =item name_sep -This only needs to be used in conjunction with L, and is used to +This only needs to be used in conjunction with C, and is used to specify the charecter that seperates elements (schemas, tables, columns) from each other. In most cases this is simply a C<.>. +The consequences of not supplying this value is that L +will assume DBIx::Class' uses of aliases to be complete column +names. The output will look like I<"me.name"> when it should actually +be I<"me"."name">. + =item unsafe This Storage driver normally installs its own C, sets @@ -436,32 +518,15 @@ If this option is true, L will use savepoints when nesting transactions, making it possible to recover from failure in the inner transaction without having to abort all outer transactions. -=back - -These options can be mixed in with your other L connection attributes, -or placed in a seperate hashref after all other normal L connection -arguments. +=item cursor_class -Every time C is invoked, any previous settings for -these options will be cleared before setting the new ones, regardless of -whether any options are specified in the new C. +Use this argument to supply a cursor class other than the default +L. -Another Important Note: - -DBIC can do some wonderful magic with handling exceptions, -disconnections, and transactions when you use C<< AutoCommit => 1 >> -combined with C for transaction support. - -If you set C<< AutoCommit => 0 >> in your connect info, then you are always -in an assumed transaction between commits, and you're telling us you'd -like to manage that manually. A lot of DBIC's magic protections -go away. We can't protect you from exceptions due to database -disconnects because we don't know anything about how to restart your -transactions. You're on your own for handling all sorts of exceptional -cases if you choose the C<< AutoCommit => 0 >> path, just as you would -be with raw DBI. +=back -Examples: +Some real-life examples of arguments to L and +L # Simple SQLite connection ->connect_info([ 'dbi:SQLite:./foo.db' ]); @@ -490,7 +555,20 @@ Examples: ] ); - # Subref + DBIC-specific connection options + # Same, but with hashref as argument + # See parse_connect_info for explanation + ->connect_info( + [{ + dsn => 'dbi:Pg:dbname=foo', + user => 'postgres', + password => 'my_pg_password', + AutoCommit => 1, + quote_char => q{"}, + name_sep => q{.}, + }] + ); + + # Subref + DBIx::Class-specific connection options ->connect_info( [ sub { DBI->connect(...) }, @@ -503,6 +581,8 @@ Examples: ] ); + + =cut sub connect_info { @@ -510,45 +590,60 @@ sub connect_info { return $self->_connect_info if !$info_arg; + my @args = @$info_arg; # take a shallow copy for further mutilation + $self->_connect_info([@args]); # copy for _connect_info + + + # combine/pre-parse arguments depending on invocation style + + my %attrs; + if (ref $args[0] eq 'CODE') { # coderef with optional \%extra_attributes + %attrs = %{ $args[1] || {} }; + @args = $args[0]; + } + elsif (ref $args[0] eq 'HASH') { # single hashref (i.e. Catalyst config) + %attrs = %{$args[0]}; + @args = (); + for (qw/password user dsn/) { + unshift @args, delete $attrs{$_}; + } + } + else { # otherwise assume dsn/user/password + \%attrs + \%extra_attrs + %attrs = ( + % { $args[3] || {} }, + % { $args[4] || {} }, + ); + @args = @args[0,1,2]; + } + # Kill sql_maker/_sql_maker_opts, so we get a fresh one with only # the new set of options $self->_sql_maker(undef); $self->_sql_maker_opts({}); - $self->_connect_info([@$info_arg]); # copy for _connect_info - my $dbi_info = [@$info_arg]; # copy for _dbi_connect_info - - my $last_info = $dbi_info->[-1]; - if(ref $last_info eq 'HASH') { - $last_info = { %$last_info }; # so delete is non-destructive - my @storage_option = qw( - on_connect_do on_disconnect_do disable_sth_caching unsafe cursor_class - auto_savepoint - ); - for my $storage_opt (@storage_option) { - if(my $value = delete $last_info->{$storage_opt}) { + if(keys %attrs) { + for my $storage_opt (@storage_options, 'cursor_class') { # @storage_options is declared at the top of the module + if(my $value = delete $attrs{$storage_opt}) { $self->$storage_opt($value); } } for my $sql_maker_opt (qw/limit_dialect quote_char name_sep/) { - if(my $opt_val = delete $last_info->{$sql_maker_opt}) { + if(my $opt_val = delete $attrs{$sql_maker_opt}) { $self->_sql_maker_opts->{$sql_maker_opt} = $opt_val; } } - # re-insert modified hashref - $dbi_info->[-1] = $last_info; - - # Get rid of any trailing empty hashref - pop(@$dbi_info) if !keys %$last_info; } - $self->_dbi_connect_info($dbi_info); + %attrs = () if (ref $args[0] eq 'CODE'); # _connect() never looks past $args[0] in this case + + $self->_dbi_connect_info([@args, keys %attrs ? \%attrs : ()]); $self->_connect_info; } =head2 on_connect_do -This method is deprecated in favor of setting via L. +This method is deprecated in favour of setting via L. + =head2 dbh_do @@ -597,7 +692,7 @@ sub dbh_do { eval { $self->_verify_pid if $dbh; - if( !$dbh ) { + if(!$self->_dbh) { $self->_populate_dbh; $dbh = $self->_dbh; } @@ -706,6 +801,28 @@ sub disconnect { } } +=head2 with_deferred_fk_checks + +=over 4 + +=item Arguments: C<$coderef> + +=item Return Value: The return value of $coderef + +=back + +Storage specific method to run the code ref with FK checks deferred or +in MySQL's case disabled entirely. + +=cut + +# Storage subclasses should override this +sub with_deferred_fk_checks { + my ($self, $sub) = @_; + + $sub->(); +} + sub connected { my ($self) = @_; @@ -857,7 +974,12 @@ sub _connect { my $weak_self = $self; weaken($weak_self); $dbh->{HandleError} = sub { - $weak_self->throw_exception("DBI Exception: $_[0]") + if ($weak_self) { + $weak_self->throw_exception("DBI Exception: $_[0]"); + } + else { + croak ("DBI Exception: $_[0]"); + } }; $dbh->{ShowErrorStatement} = 1; $dbh->{RaiseError} = 1; @@ -877,56 +999,87 @@ sub _connect { sub svp_begin { my ($self, $name) = @_; - - $self->throw_exception("You failed to provide a savepoint name!") if !$name; - if($self->{transaction_depth} == 0) { - warn("Can't use savepoints without a transaction."); - return 0; - } + $name = $self->_svp_generate_name + unless defined $name; + + $self->throw_exception ("You can't use savepoints outside a transaction") + if $self->{transaction_depth} == 0; + + $self->throw_exception ("Your Storage implementation doesn't support savepoints") + unless $self->can('_svp_begin'); + + push @{ $self->{savepoints} }, $name; - if(!$self->can('_svp_begin')) { - warn("Your Storage implementation doesn't support savepoints!"); - return 0; - } $self->debugobj->svp_begin($name) if $self->debug; - $self->_svp_begin($name); + + return $self->_svp_begin($name); } sub svp_release { my ($self, $name) = @_; - $self->throw_exception("You failed to provide a savepoint name!") if !$name; + $self->throw_exception ("You can't use savepoints outside a transaction") + if $self->{transaction_depth} == 0; - if($self->{transaction_depth} == 0) { - warn("Can't use savepoints without a transaction."); - return 0; - } + $self->throw_exception ("Your Storage implementation doesn't support savepoints") + unless $self->can('_svp_release'); - if(!$self->can('_svp_release')) { - warn("Your Storage implementation doesn't support savepoint releasing!"); - return 0; + if (defined $name) { + $self->throw_exception ("Savepoint '$name' does not exist") + unless grep { $_ eq $name } @{ $self->{savepoints} }; + + # Dig through the stack until we find the one we are releasing. This keeps + # the stack up to date. + my $svp; + + do { $svp = pop @{ $self->{savepoints} } } while $svp ne $name; + } else { + $name = pop @{ $self->{savepoints} }; } + $self->debugobj->svp_release($name) if $self->debug; - $self->_svp_release($name); + + return $self->_svp_release($name); } sub svp_rollback { my ($self, $name) = @_; - $self->throw_exception("You failed to provide a savepoint name!") if !$name; + $self->throw_exception ("You can't use savepoints outside a transaction") + if $self->{transaction_depth} == 0; - if($self->{transaction_depth} == 0) { - warn("Can't use savepoints without a transaction."); - return 0; - } + $self->throw_exception ("Your Storage implementation doesn't support savepoints") + unless $self->can('_svp_rollback'); + + if (defined $name) { + # If they passed us a name, verify that it exists in the stack + unless(grep({ $_ eq $name } @{ $self->{savepoints} })) { + $self->throw_exception("Savepoint '$name' does not exist!"); + } - if(!$self->can('_svp_rollback')) { - warn("Your Storage implementation doesn't support savepoints!"); - return 0; + # Dig through the stack until we find the one we are releasing. This keeps + # the stack up to date. + while(my $s = pop(@{ $self->{savepoints} })) { + last if($s eq $name); + } + # Add the savepoint back to the stack, as a rollback doesn't remove the + # named savepoint, only everything after it. + push(@{ $self->{savepoints} }, $name); + } else { + # We'll assume they want to rollback to the last savepoint + $name = $self->{savepoints}->[-1]; } + $self->debugobj->svp_rollback($name) if $self->debug; - $self->_svp_rollback($name); + + return $self->_svp_rollback($name); +} + +sub _svp_generate_name { + my ($self) = @_; + + return 'savepoint_'.scalar(@{ $self->{'savepoints'} }); } sub txn_begin { @@ -940,7 +1093,7 @@ sub txn_begin { # for AutoCommit users $self->dbh->begin_work; } elsif ($self->auto_savepoint) { - $self->svp_begin ("savepoint_$self->{transaction_depth}"); + $self->svp_begin; } $self->{transaction_depth}++; } @@ -957,7 +1110,7 @@ sub txn_commit { } elsif($self->{transaction_depth} > 1) { $self->{transaction_depth}--; - $self->svp_release ("savepoint_$self->{transaction_depth}") + $self->svp_release if $self->auto_savepoint; } } @@ -976,8 +1129,8 @@ sub txn_rollback { elsif($self->{transaction_depth} > 1) { $self->{transaction_depth}--; if ($self->auto_savepoint) { - $self->svp_rollback ("savepoint_$self->{transaction_depth}"); - $self->svp_release ("savepoint_$self->{transaction_depth}"); + $self->svp_rollback; + $self->svp_release; } } else { @@ -1029,6 +1182,7 @@ sub _query_start { if ( $self->debug ) { @bind = $self->_fix_bind_params(@bind); + $self->debugobj->query_start( $sql, @bind ); } } @@ -1094,12 +1248,12 @@ sub insert { my $ident = $source->from; my $bind_attributes = $self->source_bind_attributes($source); + $self->ensure_connected; foreach my $col ( $source->columns ) { if ( !defined $to_insert->{$col} ) { my $col_info = $source->column_info($col); if ( $col_info->{auto_nextval} ) { - $self->ensure_connected; $to_insert->{$col} = $self->_sequence_fetch( 'nextval', $col_info->{sequence} || $self->_dbh_get_autoinc_seq($self->dbh, $source) ); } } @@ -1186,7 +1340,11 @@ sub _select { my $order = $attrs->{order_by}; if (ref $condition eq 'SCALAR') { - $order = $1 if $$condition =~ s/ORDER BY (.*)$//i; + my $unwrap = ${$condition}; + if ($unwrap =~ s/ORDER BY (.*)$//i) { + $order = $1; + $condition = \$unwrap; + } } my $for = delete $attrs->{for}; @@ -1253,6 +1411,10 @@ sub select_single { my $self = shift; my ($rv, $sth, @bind) = $self->_select(@_); my @row = $sth->fetchrow_array; + my @nextrow = $sth->fetchrow_array if @row; + if(@row && @nextrow) { + carp "Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single"; + } # Need to call finish() to work round broken DBDs $sth->finish(); return @row; @@ -1379,9 +1541,9 @@ sub sqlt_type { shift->dbh->{Driver}->{Name} } =head2 bind_attribute_by_data_type -Given a datatype from column info, returns a database specific bind attribute for -$dbh->bind_param($val,$attribute) or nothing if we will let the database planner -just handle it. +Given a datatype from column info, returns a database specific bind +attribute for C<< $dbh->bind_param($val,$attribute) >> or nothing if we will +let the database planner just handle it. Generally only needed for special case column types, like bytea in postgres. @@ -1395,28 +1557,43 @@ sub bind_attribute_by_data_type { =over 4 -=item Arguments: $schema \@databases, $version, $directory, $preversion, $sqlt_args +=item Arguments: $schema \@databases, $version, $directory, $preversion, \%sqlt_args =back Creates a SQL file based on the Schema, for each of the specified database types, in the given directory. +By default, C<\%sqlt_args> will have + + { add_drop_table => 1, ignore_constraint_names => 1, ignore_index_names => 1 } + +merged with the hash passed in. To disable any of those features, pass in a +hashref like the following + + { ignore_constraint_names => 0, # ... other options } + =cut -sub create_ddl_dir -{ +sub create_ddl_dir { my ($self, $schema, $databases, $version, $dir, $preversion, $sqltargs) = @_; - if(!$dir || !-d $dir) - { + if(!$dir || !-d $dir) { warn "No directory given, using ./\n"; $dir = "./"; } $databases ||= ['MySQL', 'SQLite', 'PostgreSQL']; $databases = [ $databases ] if(ref($databases) ne 'ARRAY'); - $version ||= $schema->VERSION || '1.x'; - $sqltargs = { ( add_drop_table => 1 ), %{$sqltargs || {}} }; + + my $schema_version = $schema->schema_version || '1.x'; + $version ||= $schema_version; + + $sqltargs = { + add_drop_table => 1, + ignore_constraint_names => 1, + ignore_index_names => 1, + %{$sqltargs || {}} + }; $self->throw_exception(q{Can't create a ddl file without SQL::Translator 0.09: '} . $self->_check_sqlt_message . q{'}) @@ -1427,97 +1604,89 @@ sub create_ddl_dir $sqlt->parser('SQL::Translator::Parser::DBIx::Class'); my $sqlt_schema = $sqlt->translate({ data => $schema }) or die $sqlt->error; - foreach my $db (@$databases) - { + foreach my $db (@$databases) { $sqlt->reset(); $sqlt = $self->configure_sqlt($sqlt, $db); $sqlt->{schema} = $sqlt_schema; $sqlt->producer($db); my $file; - my $filename = $schema->ddl_filename($db, $dir, $version); - if(-e $filename) - { - warn("$filename already exists, skipping $db"); - next unless ($preversion); - } else { - my $output = $sqlt->translate; - if(!$output) - { - warn("Failed to translate to $db, skipping. (" . $sqlt->error . ")"); - next; - } - if(!open($file, ">$filename")) - { - $self->throw_exception("Can't open $filename for writing ($!)"); - next; - } - print $file $output; - close($file); - } - if($preversion) - { - require SQL::Translator::Diff; + my $filename = $schema->ddl_filename($db, $version, $dir); + if (-e $filename && ($version eq $schema_version )) { + # if we are dumping the current version, overwrite the DDL + warn "Overwriting existing DDL file - $filename"; + unlink($filename); + } - my $prefilename = $schema->ddl_filename($db, $dir, $preversion); -# print "Previous version $prefilename\n"; - if(!-e $prefilename) - { - warn("No previous schema file found ($prefilename)"); - next; - } + my $output = $sqlt->translate; + if(!$output) { + warn("Failed to translate to $db, skipping. (" . $sqlt->error . ")"); + next; + } + if(!open($file, ">$filename")) { + $self->throw_exception("Can't open $filename for writing ($!)"); + next; + } + print $file $output; + close($file); + + next unless ($preversion); - my $difffile = $schema->ddl_filename($db, $dir, $version, $preversion); - print STDERR "Diff: $difffile: $db, $dir, $version, $preversion \n"; - if(-e $difffile) - { - warn("$difffile already exists, skipping"); - next; - } + require SQL::Translator::Diff; - my $source_schema; - { - my $t = SQL::Translator->new($sqltargs); - $t->debug( 0 ); - $t->trace( 0 ); - $t->parser( $db ) or die $t->error; - $t = $self->configure_sqlt($t, $db); - my $out = $t->translate( $prefilename ) or die $t->error; - $source_schema = $t->schema; - unless ( $source_schema->name ) { - $source_schema->name( $prefilename ); - } - } + my $prefilename = $schema->ddl_filename($db, $preversion, $dir); + if(!-e $prefilename) { + warn("No previous schema file found ($prefilename)"); + next; + } - # The "new" style of producers have sane normalization and can support - # diffing a SQL file against a DBIC->SQLT schema. Old style ones don't - # And we have to diff parsed SQL against parsed SQL. - my $dest_schema = $sqlt_schema; - - unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) { - my $t = SQL::Translator->new($sqltargs); - $t->debug( 0 ); - $t->trace( 0 ); - $t->parser( $db ) or die $t->error; - $t = $self->configure_sqlt($t, $db); - my $out = $t->translate( $filename ) or die $t->error; - $dest_schema = $t->schema; - $dest_schema->name( $filename ) - unless $dest_schema->name; + my $difffile = $schema->ddl_filename($db, $version, $dir, $preversion); + if(-e $difffile) { + warn("Overwriting existing diff file - $difffile"); + unlink($difffile); + } + + my $source_schema; + { + my $t = SQL::Translator->new($sqltargs); + $t->debug( 0 ); + $t->trace( 0 ); + $t->parser( $db ) or die $t->error; + $t = $self->configure_sqlt($t, $db); + my $out = $t->translate( $prefilename ) or die $t->error; + $source_schema = $t->schema; + unless ( $source_schema->name ) { + $source_schema->name( $prefilename ); } + } - my $diff = SQL::Translator::Diff::schema_diff($source_schema, $db, - $dest_schema, $db, - $sqltargs - ); - if(!open $file, ">$difffile") - { - $self->throw_exception("Can't write to $difffile ($!)"); - next; - } - print $file $diff; - close($file); + # The "new" style of producers have sane normalization and can support + # diffing a SQL file against a DBIC->SQLT schema. Old style ones don't + # And we have to diff parsed SQL against parsed SQL. + my $dest_schema = $sqlt_schema; + + unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) { + my $t = SQL::Translator->new($sqltargs); + $t->debug( 0 ); + $t->trace( 0 ); + $t->parser( $db ) or die $t->error; + $t = $self->configure_sqlt($t, $db); + my $out = $t->translate( $filename ) or die $t->error; + $dest_schema = $t->schema; + $dest_schema->name( $filename ) + unless $dest_schema->name; } + + my $diff = SQL::Translator::Diff::schema_diff($source_schema, $db, + $dest_schema, $db, + $sqltargs + ); + if(!open $file, ">$difffile") { + $self->throw_exception("Can't write to $difffile ($!)"); + next; + } + print $file $diff; + close($file); } } @@ -1560,7 +1729,7 @@ sub deployment_statements { # Need to be connected to get the correct sqlt_type $self->ensure_connected() unless $type; $type ||= $self->sqlt_type; - $version ||= $schema->VERSION || '1.x'; + $version ||= $schema->schema_version || '1.x'; $dir ||= './'; my $filename = $schema->ddl_filename($type, $dir, $version); if(-f $filename) @@ -1589,9 +1758,6 @@ sub deployment_statements { my $tr = SQL::Translator->new(%$sqltargs); SQL::Translator::Parser::DBIx::Class::parse( $tr, $schema ); return "SQL::Translator::Producer::${type}"->can('produce')->($tr); - - return; - } sub deploy { @@ -1669,6 +1835,31 @@ sub build_datetime_parser { } } +=head2 is_replicating + +A boolean that reports if a particular L is set to +replicate from a master database. Default is undef, which is the result +returned by databases that don't support replication. + +=cut + +sub is_replicating { + return; + +} + +=head2 lag_behind_master + +Returns a number that represents a certain amount of lag behind a master db +when a given storage is replicating. The number is database dependent, but +starts at zero and increases with the amount of lag. Default in undef + +=cut + +sub lag_behind_master { + return; +} + sub DESTROY { my $self = shift; return if !$self->_dbh; @@ -1678,6 +1869,24 @@ sub DESTROY { 1; +=head1 USAGE NOTES + +=head2 DBIx::Class and AutoCommit + +DBIx::Class can do some wonderful magic with handling exceptions, +disconnections, and transactions when you use C<< AutoCommit => 1 >> +combined with C for transaction support. + +If you set C<< AutoCommit => 0 >> in your connect info, then you are always +in an assumed transaction between commits, and you're telling us you'd +like to manage that manually. A lot of the magic protections offered by +this module will go away. We can't protect you from exceptions due to database +disconnects because we don't know anything about how to restart your +transactions. You're on your own for handling all sorts of exceptional +cases if you choose the C<< AutoCommit => 0 >> path, just as you would +be with raw DBI. + + =head1 SQL METHODS The module defines a set of methods within the DBIC::SQL::Abstract @@ -1699,17 +1908,14 @@ The following methods are extended:- =item limit_dialect See L for details. -For setting, this method is deprecated in favor of L. =item quote_char See L for details. -For setting, this method is deprecated in favor of L. =item name_sep See L for details. -For setting, this method is deprecated in favor of L. =back