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1 | package DBIx::Class::Schema::Loader::Base; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use base qw/Class::Accessor::Fast/; |
6 | use Class::C3; |
fa994d3c |
7 | use Carp::Clan qw/^DBIx::Class/; |
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8 | use UNIVERSAL::require; |
9 | use DBIx::Class::Schema::Loader::RelBuilder; |
10 | use Data::Dump qw/ dump /; |
11 | use POSIX qw//; |
12 | require DBIx::Class; |
13 | |
32f784fc |
14 | our $VERSION = '0.03999_01'; |
15 | |
996be9ee |
16 | __PACKAGE__->mk_ro_accessors(qw/ |
17 | schema |
18 | schema_class |
19 | |
20 | exclude |
21 | constraint |
22 | additional_classes |
23 | additional_base_classes |
24 | left_base_classes |
25 | components |
26 | resultset_components |
59cfa251 |
27 | skip_relationships |
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28 | moniker_map |
29 | inflect_singular |
30 | inflect_plural |
31 | debug |
32 | dump_directory |
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33 | dump_overwrite |
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34 | |
35 | legacy_default_inflections |
36 | |
37 | db_schema |
38 | _tables |
39 | classes |
40 | monikers |
41 | /); |
42 | |
43 | =head1 NAME |
44 | |
45 | DBIx::Class::Schema::Loader::Base - Base DBIx::Class::Schema::Loader Implementation. |
46 | |
47 | =head1 SYNOPSIS |
48 | |
49 | See L<DBIx::Class::Schema::Loader> |
50 | |
51 | =head1 DESCRIPTION |
52 | |
53 | This is the base class for the storage-specific C<DBIx::Class::Schema::*> |
54 | classes, and implements the common functionality between them. |
55 | |
56 | =head1 CONSTRUCTOR OPTIONS |
57 | |
58 | These constructor options are the base options for |
59 | L<DBIx::Class::Schema::Loader/loader_opts>. Available constructor options are: |
60 | |
59cfa251 |
61 | =head2 skip_relationships |
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62 | |
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63 | Skip setting up relationships. The default is to attempt the loading |
64 | of relationships. |
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65 | |
66 | =head2 debug |
67 | |
68 | If set to true, each constructive L<DBIx::Class> statement the loader |
69 | decides to execute will be C<warn>-ed before execution. |
70 | |
d65cda9e |
71 | =head2 db_schema |
72 | |
73 | Set the name of the schema to load (schema in the sense that your database |
74 | vendor means it). Does not currently support loading more than one schema |
75 | name. |
76 | |
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77 | =head2 constraint |
78 | |
79 | Only load tables matching regex. Best specified as a qr// regex. |
80 | |
81 | =head2 exclude |
82 | |
83 | Exclude tables matching regex. Best specified as a qr// regex. |
84 | |
85 | =head2 moniker_map |
86 | |
8f9d7ce5 |
87 | Overrides the default table name to moniker translation. Can be either |
88 | a hashref of table keys and moniker values, or a coderef for a translator |
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89 | function taking a single scalar table name argument and returning |
90 | a scalar moniker. If the hash entry does not exist, or the function |
91 | returns a false value, the code falls back to default behavior |
92 | for that table name. |
93 | |
94 | The default behavior is: C<join '', map ucfirst, split /[\W_]+/, lc $table>, |
95 | which is to say: lowercase everything, split up the table name into chunks |
96 | anywhere a non-alpha-numeric character occurs, change the case of first letter |
97 | of each chunk to upper case, and put the chunks back together. Examples: |
98 | |
99 | Table Name | Moniker Name |
100 | --------------------------- |
101 | luser | Luser |
102 | luser_group | LuserGroup |
103 | luser-opts | LuserOpts |
104 | |
105 | =head2 inflect_plural |
106 | |
107 | Just like L</moniker_map> above (can be hash/code-ref, falls back to default |
108 | if hash key does not exist or coderef returns false), but acts as a map |
109 | for pluralizing relationship names. The default behavior is to utilize |
110 | L<Lingua::EN::Inflect::Number/to_PL>. |
111 | |
112 | =head2 inflect_singular |
113 | |
114 | As L</inflect_plural> above, but for singularizing relationship names. |
115 | Default behavior is to utilize L<Lingua::EN::Inflect::Number/to_S>. |
116 | |
117 | =head2 additional_base_classes |
118 | |
119 | List of additional base classes all of your table classes will use. |
120 | |
121 | =head2 left_base_classes |
122 | |
123 | List of additional base classes all of your table classes will use |
124 | that need to be leftmost. |
125 | |
126 | =head2 additional_classes |
127 | |
128 | List of additional classes which all of your table classes will use. |
129 | |
130 | =head2 components |
131 | |
132 | List of additional components to be loaded into all of your table |
133 | classes. A good example would be C<ResultSetManager>. |
134 | |
135 | =head2 resultset_components |
136 | |
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137 | List of additional ResultSet components to be loaded into your table |
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138 | classes. A good example would be C<AlwaysRS>. Component |
139 | C<ResultSetManager> will be automatically added to the above |
140 | C<components> list if this option is set. |
141 | |
142 | =head2 legacy_default_inflections |
143 | |
144 | Setting this option changes the default fallback for L</inflect_plural> to |
8f9d7ce5 |
145 | utilize L<Lingua::EN::Inflect/PL>, and L</inflect_singular> to a no-op. |
146 | Those choices produce substandard results, but might be necessary to support |
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147 | your existing code if you started developing on a version prior to 0.03 and |
148 | don't wish to go around updating all your relationship names to the new |
149 | defaults. |
150 | |
d65cda9e |
151 | This option will continue to be supported until at least version 0.05xxx, |
152 | but may dissappear sometime thereafter. It is recommended that you update |
153 | your code to use the newer-style inflections when you have the time. |
154 | |
996be9ee |
155 | =head2 dump_directory |
156 | |
157 | This option is designed to be a tool to help you transition from this |
158 | loader to a manually-defined schema when you decide it's time to do so. |
159 | |
160 | The value of this option is a perl libdir pathname. Within |
161 | that directory this module will create a baseline manual |
162 | L<DBIx::Class::Schema> module set, based on what it creates at runtime |
163 | in memory. |
164 | |
165 | The created schema class will have the same classname as the one on |
166 | which you are setting this option (and the ResultSource classes will be |
167 | based on this name as well). Therefore it is wise to note that if you |
168 | point the C<dump_directory> option of a schema class at the live libdir |
169 | where that class is currently located, it will overwrite itself with a |
170 | manual version of itself. This might be a really good or bad thing |
171 | depending on your situation and perspective. |
172 | |
8f9d7ce5 |
173 | Normally you wouldn't hard-code this setting in your schema class, as it |
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174 | is meant for one-time manual usage. |
175 | |
176 | See L<DBIx::Class::Schema::Loader/dump_to_dir> for examples of the |
177 | recommended way to access this functionality. |
178 | |
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179 | =head2 dump_overwrite |
180 | |
181 | If set to a true value, the dumping code will overwrite existing files. |
02356864 |
182 | The default is false, which means the dumping code will skip the already |
183 | existing files. |
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184 | |
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185 | =head1 METHODS |
186 | |
187 | None of these methods are intended for direct invocation by regular |
188 | users of L<DBIx::Class::Schema::Loader>. Anything you can find here |
189 | can also be found via standard L<DBIx::Class::Schema> methods somehow. |
190 | |
191 | =cut |
192 | |
193 | # ensure that a peice of object data is a valid arrayref, creating |
194 | # an empty one or encapsulating whatever's there. |
195 | sub _ensure_arrayref { |
196 | my $self = shift; |
197 | |
198 | foreach (@_) { |
199 | $self->{$_} ||= []; |
200 | $self->{$_} = [ $self->{$_} ] |
201 | unless ref $self->{$_} eq 'ARRAY'; |
202 | } |
203 | } |
204 | |
205 | =head2 new |
206 | |
207 | Constructor for L<DBIx::Class::Schema::Loader::Base>, used internally |
208 | by L<DBIx::Class::Schema::Loader>. |
209 | |
210 | =cut |
211 | |
212 | sub new { |
213 | my ( $class, %args ) = @_; |
214 | |
215 | my $self = { %args }; |
216 | |
217 | bless $self => $class; |
218 | |
219 | $self->{db_schema} ||= ''; |
220 | $self->_ensure_arrayref(qw/additional_classes |
221 | additional_base_classes |
222 | left_base_classes |
223 | components |
224 | resultset_components |
225 | /); |
226 | |
227 | push(@{$self->{components}}, 'ResultSetManager') |
228 | if @{$self->{resultset_components}}; |
229 | |
230 | $self->{monikers} = {}; |
231 | $self->{classes} = {}; |
232 | |
996be9ee |
233 | $self->{schema_class} ||= ( ref $self->{schema} || $self->{schema} ); |
234 | $self->{schema} ||= $self->{schema_class}; |
235 | |
236 | $self; |
237 | } |
238 | |
239 | sub _load_external { |
240 | my $self = shift; |
241 | |
242 | foreach my $table_class (values %{$self->classes}) { |
243 | $table_class->require; |
244 | if($@ && $@ !~ /^Can't locate /) { |
245 | croak "Failed to load external class definition" |
246 | . " for '$table_class': $@"; |
247 | } |
248 | next if $@; # "Can't locate" error |
249 | |
250 | # If we make it to here, we loaded an external definition |
251 | warn qq/# Loaded external class definition for '$table_class'\n/ |
252 | if $self->debug; |
253 | |
254 | if($self->dump_directory) { |
255 | my $class_path = $table_class; |
256 | $class_path =~ s{::}{/}g; |
e50425a9 |
257 | $class_path .= '.pm'; |
996be9ee |
258 | my $filename = $INC{$class_path}; |
259 | croak 'Failed to locate actual external module file for ' |
260 | . "'$table_class'" |
261 | if !$filename; |
262 | open(my $fh, '<', $filename) |
263 | or croak "Failed to open $filename for reading: $!"; |
264 | $self->_raw_stmt($table_class, |
265 | q|# These lines loaded from user-supplied external file: | |
266 | ); |
267 | while(<$fh>) { |
268 | chomp; |
269 | $self->_raw_stmt($table_class, $_); |
270 | } |
271 | $self->_raw_stmt($table_class, |
272 | q|# End of lines loaded from user-supplied external file | |
273 | ); |
274 | close($fh) |
275 | or croak "Failed to close $filename: $!"; |
276 | } |
277 | } |
278 | } |
279 | |
280 | =head2 load |
281 | |
282 | Does the actual schema-construction work. |
283 | |
284 | =cut |
285 | |
286 | sub load { |
287 | my $self = shift; |
288 | |
289 | $self->_load_classes; |
59cfa251 |
290 | $self->_load_relationships if ! $self->skip_relationships; |
996be9ee |
291 | $self->_load_external; |
292 | $self->_dump_to_dir if $self->dump_directory; |
293 | |
5223f24a |
294 | # Drop temporary cache |
295 | delete $self->{_cache}; |
296 | |
996be9ee |
297 | 1; |
298 | } |
299 | |
300 | sub _get_dump_filename { |
301 | my ($self, $class) = (@_); |
302 | |
303 | $class =~ s{::}{/}g; |
304 | return $self->dump_directory . q{/} . $class . q{.pm}; |
305 | } |
306 | |
307 | sub _ensure_dump_subdirs { |
308 | my ($self, $class) = (@_); |
309 | |
310 | my @name_parts = split(/::/, $class); |
311 | pop @name_parts; |
312 | my $dir = $self->dump_directory; |
313 | foreach (@name_parts) { |
314 | $dir .= q{/} . $_; |
315 | if(! -d $dir) { |
25328cc4 |
316 | mkdir($dir) or croak "mkdir('$dir') failed: $!"; |
996be9ee |
317 | } |
318 | } |
319 | } |
320 | |
321 | sub _dump_to_dir { |
322 | my ($self) = @_; |
323 | |
324 | my $target_dir = $self->dump_directory; |
d65cda9e |
325 | |
fc2b71fd |
326 | my $schema_class = $self->schema_class; |
996be9ee |
327 | |
25328cc4 |
328 | croak "Must specify target directory for dumping!" if ! $target_dir; |
996be9ee |
329 | |
fc2b71fd |
330 | warn "Dumping manual schema for $schema_class to directory $target_dir ...\n"; |
996be9ee |
331 | |
332 | if(! -d $target_dir) { |
25328cc4 |
333 | mkdir($target_dir) or croak "mkdir('$target_dir') failed: $!"; |
996be9ee |
334 | } |
335 | |
336 | my $verstr = $DBIx::Class::Schema::Loader::VERSION; |
337 | my $datestr = POSIX::strftime('%Y-%m-%d %H:%M:%S', localtime); |
338 | my $tagline = qq|# Created by DBIx::Class::Schema::Loader v$verstr @ $datestr|; |
339 | |
996be9ee |
340 | $self->_ensure_dump_subdirs($schema_class); |
341 | |
342 | my $schema_fn = $self->_get_dump_filename($schema_class); |
02356864 |
343 | if (-f $schema_fn && !$self->dump_overwrite) { |
344 | warn "$schema_fn exists, will not overwrite\n"; |
345 | } |
346 | else { |
347 | open(my $schema_fh, '>', $schema_fn) |
348 | or croak "Cannot open $schema_fn for writing: $!"; |
349 | print $schema_fh qq|package $schema_class;\n\n$tagline\n\n|; |
350 | print $schema_fh qq|use strict;\nuse warnings;\n\n|; |
351 | print $schema_fh qq|use base 'DBIx::Class::Schema';\n\n|; |
352 | print $schema_fh qq|__PACKAGE__->load_classes;\n|; |
353 | print $schema_fh qq|\n1;\n\n|; |
354 | close($schema_fh) |
355 | or croak "Cannot close $schema_fn: $!"; |
356 | } |
996be9ee |
357 | |
358 | foreach my $src_class (sort keys %{$self->{_dump_storage}}) { |
359 | $self->_ensure_dump_subdirs($src_class); |
360 | my $src_fn = $self->_get_dump_filename($src_class); |
02356864 |
361 | if (-f $src_fn && !$self->dump_overwrite) { |
362 | warn "$src_fn exists, will not overwrite\n"; |
363 | next; |
364 | } |
996be9ee |
365 | open(my $src_fh, '>', $src_fn) |
25328cc4 |
366 | or croak "Cannot open $src_fn for writing: $!"; |
996be9ee |
367 | print $src_fh qq|package $src_class;\n\n$tagline\n\n|; |
368 | print $src_fh qq|use strict;\nuse warnings;\n\n|; |
369 | print $src_fh qq|use base 'DBIx::Class';\n\n|; |
370 | print $src_fh qq|$_\n| |
371 | for @{$self->{_dump_storage}->{$src_class}}; |
372 | print $src_fh qq|\n1;\n\n|; |
373 | close($src_fh) |
25328cc4 |
374 | or croak "Cannot close $src_fn: $!"; |
996be9ee |
375 | } |
376 | |
377 | warn "Schema dump completed.\n"; |
378 | } |
379 | |
380 | sub _use { |
381 | my $self = shift; |
382 | my $target = shift; |
cb54990b |
383 | my $evalstr; |
996be9ee |
384 | |
385 | foreach (@_) { |
cb54990b |
386 | warn "$target: use $_;" if $self->debug; |
996be9ee |
387 | $self->_raw_stmt($target, "use $_;"); |
cb54990b |
388 | $_->require or croak ($_ . "->require: $@"); |
389 | $evalstr .= "package $target; use $_;"; |
996be9ee |
390 | } |
cb54990b |
391 | eval $evalstr if $evalstr; |
392 | croak $@ if $@; |
996be9ee |
393 | } |
394 | |
395 | sub _inject { |
396 | my $self = shift; |
397 | my $target = shift; |
398 | my $schema_class = $self->schema_class; |
399 | |
400 | my $blist = join(q{ }, @_); |
cb54990b |
401 | warn "$target: use base qw/ $blist /;" if $self->debug && @_; |
996be9ee |
402 | $self->_raw_stmt($target, "use base qw/ $blist /;") if @_; |
996be9ee |
403 | foreach (@_) { |
404 | $_->require or croak ($_ . "->require: $@"); |
405 | $schema_class->inject_base($target, $_); |
406 | } |
407 | } |
408 | |
409 | # Load and setup classes |
410 | sub _load_classes { |
411 | my $self = shift; |
412 | |
a13b2803 |
413 | my $schema = $self->schema; |
414 | my $schema_class = $self->schema_class; |
415 | my $constraint = $self->constraint; |
416 | my $exclude = $self->exclude; |
417 | my @tables = sort $self->_tables_list; |
996be9ee |
418 | |
419 | warn "No tables found in database, nothing to load" if !@tables; |
420 | |
421 | if(@tables) { |
422 | @tables = grep { /$constraint/ } @tables if $constraint; |
423 | @tables = grep { ! /$exclude/ } @tables if $exclude; |
424 | |
425 | warn "All tables excluded by constraint/exclude, nothing to load" |
426 | if !@tables; |
427 | } |
428 | |
429 | $self->{_tables} = \@tables; |
430 | |
431 | foreach my $table (@tables) { |
432 | my $table_moniker = $self->_table2moniker($table); |
433 | my $table_class = $schema_class . q{::} . $table_moniker; |
434 | |
435 | my $table_normalized = lc $table; |
436 | $self->classes->{$table} = $table_class; |
437 | $self->classes->{$table_normalized} = $table_class; |
438 | $self->monikers->{$table} = $table_moniker; |
439 | $self->monikers->{$table_normalized} = $table_moniker; |
440 | |
441 | no warnings 'redefine'; |
442 | local *Class::C3::reinitialize = sub { }; |
443 | use warnings; |
444 | |
a13b2803 |
445 | { no strict 'refs'; @{"${table_class}::ISA"} = qw/DBIx::Class/ } |
446 | |
996be9ee |
447 | $self->_use ($table_class, @{$self->additional_classes}); |
448 | $self->_inject($table_class, @{$self->additional_base_classes}); |
449 | |
450 | $self->_dbic_stmt($table_class, 'load_components', @{$self->components}, qw/PK::Auto Core/); |
451 | |
452 | $self->_dbic_stmt($table_class, 'load_resultset_components', @{$self->resultset_components}) |
453 | if @{$self->resultset_components}; |
454 | $self->_inject($table_class, @{$self->left_base_classes}); |
455 | } |
456 | |
457 | Class::C3::reinitialize; |
458 | |
459 | foreach my $table (@tables) { |
460 | my $table_class = $self->classes->{$table}; |
461 | my $table_moniker = $self->monikers->{$table}; |
462 | |
463 | $self->_dbic_stmt($table_class,'table',$table); |
464 | |
465 | my $cols = $self->_table_columns($table); |
a13b2803 |
466 | my $col_info; |
467 | eval { $col_info = $schema->storage->columns_info_for($table) }; |
468 | if($@) { |
469 | $self->_dbic_stmt($table_class,'add_columns',@$cols); |
470 | } |
471 | else { |
520107ef |
472 | my %col_info_lc = map { lc($_), $col_info->{$_} } keys %$col_info; |
8ac8926d |
473 | $self->_dbic_stmt( |
474 | $table_class, |
475 | 'add_columns', |
520107ef |
476 | map { $_, ($col_info_lc{$_}||{}) } @$cols |
8ac8926d |
477 | ); |
a13b2803 |
478 | } |
996be9ee |
479 | |
480 | my $pks = $self->_table_pk_info($table) || []; |
481 | @$pks ? $self->_dbic_stmt($table_class,'set_primary_key',@$pks) |
482 | : carp("$table has no primary key"); |
483 | |
484 | my $uniqs = $self->_table_uniq_info($table) || []; |
485 | $self->_dbic_stmt($table_class,'add_unique_constraint',@$_) for (@$uniqs); |
486 | |
487 | $schema_class->register_class($table_moniker, $table_class); |
488 | $schema->register_class($table_moniker, $table_class) if $schema ne $schema_class; |
489 | } |
490 | } |
491 | |
492 | =head2 tables |
493 | |
494 | Returns a sorted list of loaded tables, using the original database table |
495 | names. |
496 | |
497 | =cut |
498 | |
499 | sub tables { |
500 | my $self = shift; |
501 | |
502 | return @{$self->_tables}; |
503 | } |
504 | |
505 | # Make a moniker from a table |
506 | sub _table2moniker { |
507 | my ( $self, $table ) = @_; |
508 | |
509 | my $moniker; |
510 | |
511 | if( ref $self->moniker_map eq 'HASH' ) { |
512 | $moniker = $self->moniker_map->{$table}; |
513 | } |
514 | elsif( ref $self->moniker_map eq 'CODE' ) { |
515 | $moniker = $self->moniker_map->($table); |
516 | } |
517 | |
518 | $moniker ||= join '', map ucfirst, split /[\W_]+/, lc $table; |
519 | |
520 | return $moniker; |
521 | } |
522 | |
523 | sub _load_relationships { |
524 | my $self = shift; |
525 | |
526 | # Construct the fk_info RelBuilder wants to see, by |
527 | # translating table names to monikers in the _fk_info output |
528 | my %fk_info; |
529 | foreach my $table ($self->tables) { |
530 | my $tbl_fk_info = $self->_table_fk_info($table); |
531 | foreach my $fkdef (@$tbl_fk_info) { |
532 | $fkdef->{remote_source} = |
533 | $self->monikers->{delete $fkdef->{remote_table}}; |
534 | } |
535 | my $moniker = $self->monikers->{$table}; |
536 | $fk_info{$moniker} = $tbl_fk_info; |
537 | } |
538 | |
539 | my $relbuilder = DBIx::Class::Schema::Loader::RelBuilder->new( |
540 | $self->schema_class, \%fk_info, $self->inflect_plural, |
541 | $self->inflect_singular |
542 | ); |
543 | |
544 | my $rel_stmts = $relbuilder->generate_code; |
545 | foreach my $src_class (sort keys %$rel_stmts) { |
546 | my $src_stmts = $rel_stmts->{$src_class}; |
547 | foreach my $stmt (@$src_stmts) { |
548 | $self->_dbic_stmt($src_class,$stmt->{method},@{$stmt->{args}}); |
549 | } |
550 | } |
551 | } |
552 | |
553 | # Overload these in driver class: |
554 | |
555 | # Returns an arrayref of column names |
556 | sub _table_columns { croak "ABSTRACT METHOD" } |
557 | |
558 | # Returns arrayref of pk col names |
559 | sub _table_pk_info { croak "ABSTRACT METHOD" } |
560 | |
561 | # Returns an arrayref of uniqs [ [ foo => [ col1, col2 ] ], [ bar => [ ... ] ] ] |
562 | sub _table_uniq_info { croak "ABSTRACT METHOD" } |
563 | |
564 | # Returns an arrayref of foreign key constraints, each |
565 | # being a hashref with 3 keys: |
566 | # local_columns (arrayref), remote_columns (arrayref), remote_table |
567 | sub _table_fk_info { croak "ABSTRACT METHOD" } |
568 | |
569 | # Returns an array of lower case table names |
570 | sub _tables_list { croak "ABSTRACT METHOD" } |
571 | |
572 | # Execute a constructive DBIC class method, with debug/dump_to_dir hooks. |
573 | sub _dbic_stmt { |
574 | my $self = shift; |
575 | my $class = shift; |
576 | my $method = shift; |
577 | |
578 | if(!$self->debug && !$self->dump_directory) { |
579 | $class->$method(@_); |
580 | return; |
581 | } |
582 | |
583 | my $args = dump(@_); |
584 | $args = '(' . $args . ')' if @_ < 2; |
585 | my $stmt = $method . $args . q{;}; |
586 | |
587 | warn qq|$class\->$stmt\n| if $self->debug; |
588 | $class->$method(@_); |
589 | $self->_raw_stmt($class, '__PACKAGE__->' . $stmt); |
590 | } |
591 | |
592 | # Store a raw source line for a class (for dumping purposes) |
593 | sub _raw_stmt { |
594 | my ($self, $class, $stmt) = @_; |
595 | push(@{$self->{_dump_storage}->{$class}}, $stmt) if $self->dump_directory; |
596 | } |
597 | |
598 | =head2 monikers |
599 | |
8f9d7ce5 |
600 | Returns a hashref of loaded table to moniker mappings. There will |
996be9ee |
601 | be two entries for each table, the original name and the "normalized" |
602 | name, in the case that the two are different (such as databases |
603 | that like uppercase table names, or preserve your original mixed-case |
604 | definitions, or what-have-you). |
605 | |
606 | =head2 classes |
607 | |
8f9d7ce5 |
608 | Returns a hashref of table to class mappings. In some cases it will |
996be9ee |
609 | contain multiple entries per table for the original and normalized table |
610 | names, as above in L</monikers>. |
611 | |
612 | =head1 SEE ALSO |
613 | |
614 | L<DBIx::Class::Schema::Loader> |
615 | |
616 | =cut |
617 | |
618 | 1; |