1 package DBIx::Class::Schema::Loader::Base;
5 use base qw/Class::Accessor::Fast Class::C3::Componentised/;
7 use Carp::Clan qw/^DBIx::Class/;
8 use DBIx::Class::Schema::Loader::RelBuilder;
9 use Data::Dump qw/ dump /;
14 use Lingua::EN::Inflect::Number qw//;
19 our $VERSION = '0.04999_10';
21 __PACKAGE__->mk_ro_accessors(qw/
28 additional_base_classes
43 default_resultset_class
55 DBIx::Class::Schema::Loader::Base - Base DBIx::Class::Schema::Loader Implementation.
59 See L<DBIx::Class::Schema::Loader>
63 This is the base class for the storage-specific C<DBIx::Class::Schema::*>
64 classes, and implements the common functionality between them.
66 =head1 CONSTRUCTOR OPTIONS
68 These constructor options are the base options for
69 L<DBIx::Class::Schema::Loader/loader_options>. Available constructor options are:
71 =head2 skip_relationships
73 Skip setting up relationships. The default is to attempt the loading
78 If set to true, each constructive L<DBIx::Class> statement the loader
79 decides to execute will be C<warn>-ed before execution.
83 Set the name of the schema to load (schema in the sense that your database
84 vendor means it). Does not currently support loading more than one schema
89 Only load tables matching regex. Best specified as a qr// regex.
93 Exclude tables matching regex. Best specified as a qr// regex.
97 Overrides the default table name to moniker translation. Can be either
98 a hashref of table keys and moniker values, or a coderef for a translator
99 function taking a single scalar table name argument and returning
100 a scalar moniker. If the hash entry does not exist, or the function
101 returns a false value, the code falls back to default behavior
104 The default behavior is: C<join '', map ucfirst, split /[\W_]+/, lc $table>,
105 which is to say: lowercase everything, split up the table name into chunks
106 anywhere a non-alpha-numeric character occurs, change the case of first letter
107 of each chunk to upper case, and put the chunks back together. Examples:
109 Table Name | Moniker Name
110 ---------------------------
112 luser_group | LuserGroup
113 luser-opts | LuserOpts
115 =head2 inflect_plural
117 Just like L</moniker_map> above (can be hash/code-ref, falls back to default
118 if hash key does not exist or coderef returns false), but acts as a map
119 for pluralizing relationship names. The default behavior is to utilize
120 L<Lingua::EN::Inflect::Number/to_PL>.
122 =head2 inflect_singular
124 As L</inflect_plural> above, but for singularizing relationship names.
125 Default behavior is to utilize L<Lingua::EN::Inflect::Number/to_S>.
127 =head2 schema_base_class
129 Base class for your schema classes. Defaults to 'DBIx::Class::Schema'.
131 =head2 result_base_class
133 Base class for your table classes (aka result classes). Defaults to 'DBIx::Class'.
135 =head2 additional_base_classes
137 List of additional base classes all of your table classes will use.
139 =head2 left_base_classes
141 List of additional base classes all of your table classes will use
142 that need to be leftmost.
144 =head2 additional_classes
146 List of additional classes which all of your table classes will use.
150 List of additional components to be loaded into all of your table
151 classes. A good example would be C<ResultSetManager>.
153 =head2 resultset_components
155 List of additional ResultSet components to be loaded into your table
156 classes. A good example would be C<AlwaysRS>. Component
157 C<ResultSetManager> will be automatically added to the above
158 C<components> list if this option is set.
160 =head2 use_namespaces
162 Generate result class names suitable for
163 L<DBIx::Class::Schema/load_namespaces> and call that instead of
164 L<DBIx::Class::Schema/load_classes>. When using this option you can also
165 specify any of the options for C<load_namespaces> (i.e. C<result_namespace>,
166 C<resultset_namespace>, C<default_resultset_class>), and they will be added
167 to the call (and the generated result class names adjusted appropriately).
169 =head2 dump_directory
171 This option is designed to be a tool to help you transition from this
172 loader to a manually-defined schema when you decide it's time to do so.
174 The value of this option is a perl libdir pathname. Within
175 that directory this module will create a baseline manual
176 L<DBIx::Class::Schema> module set, based on what it creates at runtime
179 The created schema class will have the same classname as the one on
180 which you are setting this option (and the ResultSource classes will be
181 based on this name as well).
183 Normally you wouldn't hard-code this setting in your schema class, as it
184 is meant for one-time manual usage.
186 See L<DBIx::Class::Schema::Loader/dump_to_dir> for examples of the
187 recommended way to access this functionality.
189 =head2 dump_overwrite
191 Deprecated. See L</really_erase_my_files> below, which does *not* mean
192 the same thing as the old C<dump_overwrite> setting from previous releases.
194 =head2 really_erase_my_files
196 Default false. If true, Loader will unconditionally delete any existing
197 files before creating the new ones from scratch when dumping a schema to disk.
199 The default behavior is instead to only replace the top portion of the
200 file, up to and including the final stanza which contains
201 C<# DO NOT MODIFY THIS OR ANYTHING ABOVE!>
202 leaving any customizations you placed after that as they were.
204 When C<really_erase_my_files> is not set, if the output file already exists,
205 but the aforementioned final stanza is not found, or the checksum
206 contained there does not match the generated contents, Loader will
207 croak and not touch the file.
209 You should really be using version control on your schema classes (and all
210 of the rest of your code for that matter). Don't blame me if a bug in this
211 code wipes something out when it shouldn't have, you've been warned.
215 None of these methods are intended for direct invocation by regular
216 users of L<DBIx::Class::Schema::Loader>. Anything you can find here
217 can also be found via standard L<DBIx::Class::Schema> methods somehow.
221 # ensure that a peice of object data is a valid arrayref, creating
222 # an empty one or encapsulating whatever's there.
223 sub _ensure_arrayref {
228 $self->{$_} = [ $self->{$_} ]
229 unless ref $self->{$_} eq 'ARRAY';
235 Constructor for L<DBIx::Class::Schema::Loader::Base>, used internally
236 by L<DBIx::Class::Schema::Loader>.
241 my ( $class, %args ) = @_;
243 my $self = { %args };
245 bless $self => $class;
247 $self->_ensure_arrayref(qw/additional_classes
248 additional_base_classes
254 push(@{$self->{components}}, 'ResultSetManager')
255 if @{$self->{resultset_components}};
257 $self->{monikers} = {};
258 $self->{classes} = {};
260 $self->{schema_class} ||= ( ref $self->{schema} || $self->{schema} );
261 $self->{schema} ||= $self->{schema_class};
263 croak "dump_overwrite is deprecated. Please read the"
264 . " DBIx::Class::Schema::Loader::Base documentation"
265 if $self->{dump_overwrite};
267 $self->{dynamic} = ! $self->{dump_directory};
268 $self->{temp_directory} ||= File::Temp::tempdir( 'dbicXXXX',
273 $self->{dump_directory} ||= $self->{temp_directory};
275 $self->{relbuilder} = DBIx::Class::Schema::Loader::RelBuilder->new(
276 $self->schema, $self->inflect_plural, $self->inflect_singular
277 ) if !$self->{skip_relationships};
282 sub _find_file_in_inc {
283 my ($self, $file) = @_;
285 foreach my $prefix (@INC) {
286 my $fullpath = File::Spec->catfile($prefix, $file);
287 return $fullpath if -f $fullpath
288 and Cwd::abs_path($fullpath) ne
289 Cwd::abs_path(File::Spec->catfile($self->dump_directory, $file)) || '';
296 my ($self, $class) = @_;
298 my $class_path = $class;
299 $class_path =~ s{::}{/}g;
300 $class_path .= '.pm';
302 my $real_inc_path = $self->_find_file_in_inc($class_path);
304 return if !$real_inc_path;
306 # If we make it to here, we loaded an external definition
307 warn qq/# Loaded external class definition for '$class'\n/
310 croak 'Failed to locate actual external module file for '
313 open(my $fh, '<', $real_inc_path)
314 or croak "Failed to open '$real_inc_path' for reading: $!";
315 $self->_ext_stmt($class,
316 qq|# These lines were loaded from '$real_inc_path' found in \@INC.\n|
317 .qq|# They are now part of the custom portion of this file\n|
318 .qq|# for you to hand-edit. If you do not either delete\n|
319 .qq|# this section or remove that file from \@INC, this section\n|
320 .qq|# will be repeated redundantly when you re-create this\n|
321 .qq|# file again via Loader!\n|
325 $self->_ext_stmt($class, $_);
327 $self->_ext_stmt($class,
328 qq|# End of lines loaded from '$real_inc_path' |
331 or croak "Failed to close $real_inc_path: $!";
336 Does the actual schema-construction work.
343 $self->_load_tables($self->_tables_list);
350 Rescan the database for newly added tables. Does
351 not process drops or changes. Returns a list of
352 the newly added table monikers.
354 The schema argument should be the schema class
355 or object to be affected. It should probably
356 be derived from the original schema_class used
362 my ($self, $schema) = @_;
364 $self->{schema} = $schema;
365 $self->{relbuilder}{schema} = $schema;
368 my @current = $self->_tables_list;
369 foreach my $table ($self->_tables_list) {
370 if(!exists $self->{_tables}->{$table}) {
371 push(@created, $table);
375 my $loaded = $self->_load_tables(@created);
377 return map { $self->monikers->{$_} } @$loaded;
381 my ($self, @tables) = @_;
383 # First, use _tables_list with constraint and exclude
384 # to get a list of tables to operate on
386 my $constraint = $self->constraint;
387 my $exclude = $self->exclude;
389 @tables = grep { /$constraint/ } @tables if $constraint;
390 @tables = grep { ! /$exclude/ } @tables if $exclude;
392 # Save the new tables to the tables list
394 $self->{_tables}->{$_} = 1;
397 $self->_make_src_class($_) for @tables;
398 $self->_setup_src_meta($_) for @tables;
400 if(!$self->skip_relationships) {
401 # The relationship loader needs a working schema
403 local $self->{dump_directory} = $self->{temp_directory};
404 $self->_reload_classes(@tables);
405 $self->_load_relationships($_) for @tables;
408 # Remove that temp dir from INC so it doesn't get reloaded
409 @INC = grep { $_ ne $self->{dump_directory} } @INC;
412 $self->_load_external($_)
413 for map { $self->classes->{$_} } @tables;
415 $self->_reload_classes(@tables);
417 # Drop temporary cache
418 delete $self->{_cache};
423 sub _reload_classes {
424 my ($self, @tables) = @_;
426 $self->_dump_to_dir(map { $self->classes->{$_} } @tables);
428 unshift @INC, $self->dump_directory;
431 my %have_source = map { $_ => $self->schema->source($_) }
432 $self->schema->sources;
434 for my $table (@tables) {
435 my $moniker = $self->monikers->{$table};
436 my $class = $self->classes->{$table};
439 no warnings 'redefine';
440 local *Class::C3::reinitialize = sub {};
443 Class::Unload->unload($class);
444 my ($source, $resultset_class);
446 ($source = $have_source{$moniker})
447 && ($resultset_class = $source->resultset_class)
448 && ($resultset_class ne 'DBIx::Class::ResultSet')
450 my $has_file = Class::Inspector->loaded_filename($resultset_class);
451 Class::Unload->unload($resultset_class);
452 $self->ensure_class_loaded($resultset_class) if $has_file;
454 $self->ensure_class_loaded($class);
456 push @to_register, [$moniker, $class];
459 Class::C3->reinitialize;
461 $self->schema->register_class(@$_);
465 sub _get_dump_filename {
466 my ($self, $class) = (@_);
469 return $self->dump_directory . q{/} . $class . q{.pm};
472 sub _ensure_dump_subdirs {
473 my ($self, $class) = (@_);
475 my @name_parts = split(/::/, $class);
476 pop @name_parts; # we don't care about the very last element,
477 # which is a filename
479 my $dir = $self->dump_directory;
482 mkdir($dir) or croak "mkdir('$dir') failed: $!";
484 last if !@name_parts;
485 $dir = File::Spec->catdir($dir, shift @name_parts);
490 my ($self, @classes) = @_;
492 my $schema_class = $self->schema_class;
493 my $schema_base_class = $self->schema_base_class || 'DBIx::Class::Schema';
495 my $target_dir = $self->dump_directory;
496 warn "Dumping manual schema for $schema_class to directory $target_dir ...\n"
497 unless $self->{dynamic} or $self->{quiet};
500 qq|package $schema_class;\n\n|
501 . qq|# Created by DBIx::Class::Schema::Loader\n|
502 . qq|# DO NOT MODIFY THE FIRST PART OF THIS FILE\n\n|
503 . qq|use strict;\nuse warnings;\n\n|
504 . qq|use base '$schema_base_class';\n\n|;
506 if ($self->use_namespaces) {
507 $schema_text .= qq|__PACKAGE__->load_namespaces|;
508 my $namespace_options;
509 for my $attr (qw(result_namespace
511 default_resultset_class)) {
513 $namespace_options .= qq| $attr => '| . $self->$attr . qq|',\n|
516 $schema_text .= qq|(\n$namespace_options)| if $namespace_options;
517 $schema_text .= qq|;\n|;
520 $schema_text .= qq|__PACKAGE__->load_classes;\n|;
523 $self->_write_classfile($schema_class, $schema_text);
525 my $result_base_class = $self->result_base_class || 'DBIx::Class';
527 foreach my $src_class (@classes) {
529 qq|package $src_class;\n\n|
530 . qq|# Created by DBIx::Class::Schema::Loader\n|
531 . qq|# DO NOT MODIFY THE FIRST PART OF THIS FILE\n\n|
532 . qq|use strict;\nuse warnings;\n\n|
533 . qq|use base '$result_base_class';\n\n|;
535 $self->_write_classfile($src_class, $src_text);
538 warn "Schema dump completed.\n" unless $self->{dynamic} or $self->{quiet};
543 my ($self, $version, $ts) = @_;
544 return qq|\n\n# Created by DBIx::Class::Schema::Loader|
547 . qq|\n# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:|;
550 sub _write_classfile {
551 my ($self, $class, $text) = @_;
553 my $filename = $self->_get_dump_filename($class);
554 $self->_ensure_dump_subdirs($class);
556 if (-f $filename && $self->really_erase_my_files) {
557 warn "Deleting existing file '$filename' due to "
558 . "'really_erase_my_files' setting\n" unless $self->{quiet};
562 my ($custom_content, $old_md5, $old_ver, $old_ts) = $self->_get_custom_content($class, $filename);
565 for @{$self->{_dump_storage}->{$class} || []};
567 # Check and see if the dump is infact differnt
571 $compare_to = $text . $self->_sig_comment($old_ver, $old_ts);
574 if (Digest::MD5::md5_base64($compare_to) eq $old_md5) {
579 $text .= $self->_sig_comment(
580 $DBIx::Class::Schema::Loader::VERSION,
581 POSIX::strftime('%Y-%m-%d %H:%M:%S', localtime)
584 open(my $fh, '>', $filename)
585 or croak "Cannot open '$filename' for writing: $!";
587 # Write the top half and its MD5 sum
588 print $fh $text . Digest::MD5::md5_base64($text) . "\n";
590 # Write out anything loaded via external partial class file in @INC
592 for @{$self->{_ext_storage}->{$class} || []};
594 # Write out any custom content the user has added
595 print $fh $custom_content;
598 or croak "Error closing '$filename': $!";
601 sub _default_custom_content {
602 return qq|\n\n# You can replace this text with custom|
603 . qq| content, and it will be preserved on regeneration|
607 sub _get_custom_content {
608 my ($self, $class, $filename) = @_;
610 return ($self->_default_custom_content) if ! -f $filename;
612 open(my $fh, '<', $filename)
613 or croak "Cannot open '$filename' for reading: $!";
616 qr{^(# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:)([A-Za-z0-9/+]{22})\n};
619 my ($md5, $ts, $ver);
621 if(!$md5 && /$mark_re/) {
625 # Pull out the previous version and timestamp
626 ($ver, $ts) = $buffer =~ m/# Created by DBIx::Class::Schema::Loader v(.*?) @ (.*?)$/s;
629 croak "Checksum mismatch in '$filename'"
630 if Digest::MD5::md5_base64($buffer) ne $md5;
639 croak "Cannot not overwrite '$filename' without 'really_erase_my_files',"
640 . " it does not appear to have been generated by Loader"
643 # Default custom content:
644 $buffer ||= $self->_default_custom_content;
646 return ($buffer, $md5, $ver, $ts);
654 warn "$target: use $_;" if $self->debug;
655 $self->_raw_stmt($target, "use $_;");
662 my $schema_class = $self->schema_class;
664 my $blist = join(q{ }, @_);
665 warn "$target: use base qw/ $blist /;" if $self->debug && @_;
666 $self->_raw_stmt($target, "use base qw/ $blist /;") if @_;
669 # Create class with applicable bases, setup monikers, etc
670 sub _make_src_class {
671 my ($self, $table) = @_;
673 my $schema = $self->schema;
674 my $schema_class = $self->schema_class;
676 my $table_moniker = $self->_table2moniker($table);
677 my @result_namespace = ($schema_class);
678 if ($self->use_namespaces) {
679 my $result_namespace = $self->result_namespace || 'Result';
680 if ($result_namespace =~ /^\+(.*)/) {
681 # Fully qualified namespace
682 @result_namespace = ($1)
686 push @result_namespace, $result_namespace;
689 my $table_class = join(q{::}, @result_namespace, $table_moniker);
691 my $table_normalized = lc $table;
692 $self->classes->{$table} = $table_class;
693 $self->classes->{$table_normalized} = $table_class;
694 $self->monikers->{$table} = $table_moniker;
695 $self->monikers->{$table_normalized} = $table_moniker;
697 $self->_use ($table_class, @{$self->additional_classes});
698 $self->_inject($table_class, @{$self->left_base_classes});
700 $self->_dbic_stmt($table_class, 'load_components', @{$self->components}, 'Core');
702 $self->_dbic_stmt($table_class, 'load_resultset_components', @{$self->resultset_components})
703 if @{$self->resultset_components};
704 $self->_inject($table_class, @{$self->additional_base_classes});
707 # Set up metadata (cols, pks, etc)
708 sub _setup_src_meta {
709 my ($self, $table) = @_;
711 my $schema = $self->schema;
712 my $schema_class = $self->schema_class;
714 my $table_class = $self->classes->{$table};
715 my $table_moniker = $self->monikers->{$table};
717 my $table_name = $table;
718 my $name_sep = $self->schema->storage->sql_maker->name_sep;
720 if ($name_sep && $table_name =~ /\Q$name_sep\E/) {
721 $table_name = \ $self->_quote_table_name($table_name);
724 $self->_dbic_stmt($table_class,'table',$table_name);
726 my $cols = $self->_table_columns($table);
728 eval { $col_info = $self->_columns_info_for($table) };
730 $self->_dbic_stmt($table_class,'add_columns',@$cols);
733 if ($self->_is_case_sensitive) {
734 for my $col (keys %$col_info) {
735 $col_info->{$col}{accessor} = lc $col
739 $col_info = { map { lc($_), $col_info->{$_} } keys %$col_info };
742 my $fks = $self->_table_fk_info($table);
744 for my $fkdef (@$fks) {
745 for my $col (@{ $fkdef->{local_columns} }) {
746 $col_info->{$col}{is_foreign_key} = 1;
752 map { $_, ($col_info->{$_}||{}) } @$cols
756 my %uniq_tag; # used to eliminate duplicate uniqs
758 my $pks = $self->_table_pk_info($table) || [];
759 @$pks ? $self->_dbic_stmt($table_class,'set_primary_key',@$pks)
760 : carp("$table has no primary key");
761 $uniq_tag{ join("\0", @$pks) }++ if @$pks; # pk is a uniq
763 my $uniqs = $self->_table_uniq_info($table) || [];
765 my ($name, $cols) = @$_;
766 next if $uniq_tag{ join("\0", @$cols) }++; # skip duplicates
767 $self->_dbic_stmt($table_class,'add_unique_constraint', $name, $cols);
774 Returns a sorted list of loaded tables, using the original database table
782 return keys %{$self->_tables};
785 # Make a moniker from a table
786 sub _default_table2moniker {
787 my ($self, $table) = @_;
789 return join '', map ucfirst, split /[\W_]+/,
790 Lingua::EN::Inflect::Number::to_S(lc $table);
794 my ( $self, $table ) = @_;
798 if( ref $self->moniker_map eq 'HASH' ) {
799 $moniker = $self->moniker_map->{$table};
801 elsif( ref $self->moniker_map eq 'CODE' ) {
802 $moniker = $self->moniker_map->($table);
805 $moniker ||= $self->_default_table2moniker($table);
810 sub _load_relationships {
811 my ($self, $table) = @_;
813 my $tbl_fk_info = $self->_table_fk_info($table);
814 foreach my $fkdef (@$tbl_fk_info) {
815 $fkdef->{remote_source} =
816 $self->monikers->{delete $fkdef->{remote_table}};
818 my $tbl_uniq_info = $self->_table_uniq_info($table);
820 my $local_moniker = $self->monikers->{$table};
821 my $rel_stmts = $self->{relbuilder}->generate_code($local_moniker, $tbl_fk_info, $tbl_uniq_info);
823 foreach my $src_class (sort keys %$rel_stmts) {
824 my $src_stmts = $rel_stmts->{$src_class};
825 foreach my $stmt (@$src_stmts) {
826 $self->_dbic_stmt($src_class,$stmt->{method},@{$stmt->{args}});
831 # Overload these in driver class:
833 # Returns an arrayref of column names
834 sub _table_columns { croak "ABSTRACT METHOD" }
836 # Returns arrayref of pk col names
837 sub _table_pk_info { croak "ABSTRACT METHOD" }
839 # Returns an arrayref of uniqs [ [ foo => [ col1, col2 ] ], [ bar => [ ... ] ] ]
840 sub _table_uniq_info { croak "ABSTRACT METHOD" }
842 # Returns an arrayref of foreign key constraints, each
843 # being a hashref with 3 keys:
844 # local_columns (arrayref), remote_columns (arrayref), remote_table
845 sub _table_fk_info { croak "ABSTRACT METHOD" }
847 # Returns an array of lower case table names
848 sub _tables_list { croak "ABSTRACT METHOD" }
850 # Execute a constructive DBIC class method, with debug/dump_to_dir hooks.
857 $args = '(' . $args . ')' if @_ < 2;
858 my $stmt = $method . $args . q{;};
860 warn qq|$class\->$stmt\n| if $self->debug;
861 $self->_raw_stmt($class, '__PACKAGE__->' . $stmt);
864 # Store a raw source line for a class (for dumping purposes)
866 my ($self, $class, $stmt) = @_;
867 push(@{$self->{_dump_storage}->{$class}}, $stmt);
870 # Like above, but separately for the externally loaded stuff
872 my ($self, $class, $stmt) = @_;
873 push(@{$self->{_ext_storage}->{$class}}, $stmt);
876 sub _quote_table_name {
877 my ($self, $table) = @_;
879 my $qt = $self->schema->storage->sql_maker->quote_char;
881 return $table unless $qt;
884 return $qt->[0] . $table . $qt->[1];
887 return $qt . $table . $qt;
890 sub _is_case_sensitive { 0 }
894 Returns a hashref of loaded table to moniker mappings. There will
895 be two entries for each table, the original name and the "normalized"
896 name, in the case that the two are different (such as databases
897 that like uppercase table names, or preserve your original mixed-case
898 definitions, or what-have-you).
902 Returns a hashref of table to class mappings. In some cases it will
903 contain multiple entries per table for the original and normalized table
904 names, as above in L</monikers>.
908 L<DBIx::Class::Schema::Loader>