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9c992ba1 |
1 | package DBIx::Class::ResultSource; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use DBIx::Class::ResultSet; |
701da8c4 |
7 | use Carp::Clan qw/^DBIx::Class/; |
9c992ba1 |
8 | |
6da5894c |
9 | use Storable; |
1225fc4d |
10 | use Scalar::Util qw/weaken/; |
6da5894c |
11 | |
9c992ba1 |
12 | use base qw/DBIx::Class/; |
13 | __PACKAGE__->load_components(qw/AccessorGroup/); |
14 | |
15 | __PACKAGE__->mk_group_accessors('simple' => |
fc969005 |
16 | qw/_ordered_columns _columns _primaries _unique_constraints name resultset_attributes schema from _relationships/); |
17 | __PACKAGE__->mk_group_accessors('component_class' => qw/resultset_class result_class/); |
9c992ba1 |
18 | |
19 | =head1 NAME |
20 | |
21 | DBIx::Class::ResultSource - Result source object |
22 | |
23 | =head1 SYNOPSIS |
24 | |
25 | =head1 DESCRIPTION |
26 | |
27 | A ResultSource is a component of a schema from which results can be directly |
28 | retrieved, most usually a table (see L<DBIx::Class::ResultSource::Table>) |
29 | |
30 | =head1 METHODS |
31 | |
32 | =cut |
33 | |
34 | sub new { |
35 | my ($class, $attrs) = @_; |
36 | $class = ref $class if ref $class; |
1225fc4d |
37 | my $new = bless({ %{$attrs || {}}, _resultset => undef }, $class); |
9c992ba1 |
38 | $new->{resultset_class} ||= 'DBIx::Class::ResultSet'; |
5ac6a044 |
39 | $new->{resultset_attributes} = { %{$new->{resultset_attributes} || {}} }; |
6da5894c |
40 | $new->{_ordered_columns} = [ @{$new->{_ordered_columns}||[]}]; |
41 | $new->{_columns} = { %{$new->{_columns}||{}} }; |
42 | $new->{_relationships} = { %{$new->{_relationships}||{}} }; |
9c992ba1 |
43 | $new->{name} ||= "!!NAME NOT SET!!"; |
5afa2a15 |
44 | $new->{_columns_info_loaded} ||= 0; |
9c992ba1 |
45 | return $new; |
46 | } |
47 | |
988bf309 |
48 | =pod |
49 | |
5ac6a044 |
50 | =head2 add_columns |
51 | |
52 | $table->add_columns(qw/col1 col2 col3/); |
53 | |
54 | $table->add_columns('col1' => \%col1_info, 'col2' => \%col2_info, ...); |
55 | |
56 | Adds columns to the result source. If supplied key => hashref pairs uses |
57 | the hashref as the column_info for that column. |
58 | |
988bf309 |
59 | Repeated calls of this method will add more columns, not replace them. |
60 | |
61 | The contents of the column_info are not set in stone, the following |
62 | keys are currently recognised/used by DBIx::Class. |
63 | |
64 | =over 4 |
65 | |
66 | =item accessor |
67 | |
68 | Use this to set the name of the accessor for this column. If unset, |
69 | the name of the column will be used. |
70 | |
71 | =item data_type |
72 | |
73 | This contains the column type, it is automatically filled by the |
74 | L<SQL::Translator::Producer::DBIx::Class::File> producer, and the |
75 | L<DBIx::Class::Schema::Loader> module. If you do not enter the |
76 | data_type, DBIx::Class will attempt to retrieve it from the |
77 | database for you, using L<DBI>s column_info method. The values of this |
78 | key are typically upper-cased. |
79 | |
80 | Currently there is no standard set of values for the data_type, use |
81 | whatever your database(s) support. |
82 | |
83 | =item size |
84 | |
85 | The length of your column, if it is a column type that can have a size |
86 | restriction. This is currently not used by DBIx::Class. |
87 | |
88 | =item is_nullable |
89 | |
90 | If the column is allowed to contain NULL values, set a true value |
91 | (typically 1), here. This is currently not used by DBIx::Class. |
92 | |
93 | =item is_auto_increment |
94 | |
95 | Set this to a true value if this is a column that is somehow |
96 | automatically filled. This is currently not used by DBIx::Class. |
97 | |
98 | =item is_foreign_key |
99 | |
100 | Set this to a true value if this column represents a key from a |
101 | foreign table. This is currently not used by DBIx::Class. |
102 | |
103 | =item default_value |
104 | |
105 | Set this to the default value which will be inserted into this column |
106 | by the database. Can contain either values or functions. This is |
107 | currently not used by DBIx::Class. |
108 | |
109 | =item sequence |
110 | |
111 | If your column is using a sequence to create it's values, set the name |
112 | of the sequence here, to allow the values to be retrieved |
113 | automatically by the L<DBIx::Class::PK::Auto> module. PK::Auto will |
114 | attempt to retrieve the sequence name from the database, if this value |
115 | is left unset. |
116 | |
117 | =back |
118 | |
5ac6a044 |
119 | =head2 add_column |
120 | |
121 | $table->add_column('col' => \%info?); |
122 | |
123 | Convenience alias to add_columns |
124 | |
125 | =cut |
126 | |
9c992ba1 |
127 | sub add_columns { |
128 | my ($self, @cols) = @_; |
8e04bf91 |
129 | $self->_ordered_columns(\@cols) unless $self->_ordered_columns; |
130 | |
20518cb4 |
131 | my @added; |
132 | my $columns = $self->_columns; |
9c992ba1 |
133 | while (my $col = shift @cols) { |
8e04bf91 |
134 | # If next entry is { ... } use that for the column info, if not |
135 | # use an empty hashref |
30126ac7 |
136 | my $column_info = ref $cols[0] ? shift(@cols) : {}; |
20518cb4 |
137 | push(@added, $col) unless exists $columns->{$col}; |
20518cb4 |
138 | $columns->{$col} = $column_info; |
9c992ba1 |
139 | } |
20518cb4 |
140 | push @{ $self->_ordered_columns }, @added; |
30126ac7 |
141 | return $self; |
9c992ba1 |
142 | } |
143 | |
144 | *add_column = \&add_columns; |
145 | |
3842b955 |
146 | =head2 has_column |
147 | |
988bf309 |
148 | if ($obj->has_column($col)) { ... } |
149 | |
9c992ba1 |
150 | Returns 1 if the source has a column of this name, 0 otherwise. |
988bf309 |
151 | |
152 | =cut |
9c992ba1 |
153 | |
154 | sub has_column { |
155 | my ($self, $column) = @_; |
156 | return exists $self->_columns->{$column}; |
157 | } |
158 | |
87c4e602 |
159 | =head2 column_info |
9c992ba1 |
160 | |
988bf309 |
161 | my $info = $obj->column_info($col); |
9c992ba1 |
162 | |
988bf309 |
163 | Returns the column metadata hashref for a column. See the description |
164 | of add_column for information on the contents of the hashref. |
9c992ba1 |
165 | |
988bf309 |
166 | =cut |
9c992ba1 |
167 | |
168 | sub column_info { |
169 | my ($self, $column) = @_; |
701da8c4 |
170 | $self->throw_exception("No such column $column") |
171 | unless exists $self->_columns->{$column}; |
5afa2a15 |
172 | #warn $self->{_columns_info_loaded}, "\n"; |
8e04bf91 |
173 | if ( ! $self->_columns->{$column}{data_type} |
174 | and ! $self->{_columns_info_loaded} |
175 | and $self->schema and $self->storage ) |
176 | { |
177 | $self->{_columns_info_loaded}++; |
178 | my $info; |
179 | # eval for the case of storage without table |
180 | eval { $info = $self->storage->columns_info_for($self->from) }; |
181 | unless ($@) { |
182 | foreach my $col ( keys %{$self->_columns} ) { |
183 | foreach my $i ( keys %{$info->{$col}} ) { |
184 | $self->_columns->{$col}{$i} = $info->{$col}{$i}; |
185 | } |
a953d8d9 |
186 | } |
8e04bf91 |
187 | } |
a953d8d9 |
188 | } |
9c992ba1 |
189 | return $self->_columns->{$column}; |
190 | } |
191 | |
192 | =head2 columns |
193 | |
20518cb4 |
194 | my @column_names = $obj->columns; |
195 | |
196 | Returns all column names in the order they were declared to add_columns |
87f0da6a |
197 | |
198 | =cut |
9c992ba1 |
199 | |
200 | sub columns { |
8e04bf91 |
201 | my $self = shift; |
701da8c4 |
202 | $self->throw_exception("columns() is a read-only accessor, did you mean add_columns()?") if (@_ > 1); |
203 | return @{$self->{_ordered_columns}||[]}; |
571dced3 |
204 | } |
205 | |
87c4e602 |
206 | =head2 set_primary_key |
207 | |
208 | =head3 Arguments: (@cols) |
87f0da6a |
209 | |
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210 | Defines one or more columns as primary key for this source. Should be |
211 | called after C<add_columns>. |
87f0da6a |
212 | |
213 | Additionally, defines a unique constraint named C<primary>. |
214 | |
988bf309 |
215 | The primary key columns are used by L<DBIx::Class::PK::Auto> to |
216 | retrieve automatically created values from the database. |
217 | |
87f0da6a |
218 | =cut |
9c992ba1 |
219 | |
220 | sub set_primary_key { |
221 | my ($self, @cols) = @_; |
222 | # check if primary key columns are valid columns |
8e04bf91 |
223 | foreach my $col (@cols) { |
224 | $self->throw_exception("No such column $col on table " . $self->name) |
225 | unless $self->has_column($col); |
9c992ba1 |
226 | } |
227 | $self->_primaries(\@cols); |
87f0da6a |
228 | |
229 | $self->add_unique_constraint(primary => \@cols); |
9c992ba1 |
230 | } |
231 | |
87f0da6a |
232 | =head2 primary_columns |
233 | |
9c992ba1 |
234 | Read-only accessor which returns the list of primary keys. |
30126ac7 |
235 | |
87f0da6a |
236 | =cut |
9c992ba1 |
237 | |
238 | sub primary_columns { |
239 | return @{shift->_primaries||[]}; |
240 | } |
241 | |
87f0da6a |
242 | =head2 add_unique_constraint |
243 | |
244 | Declare a unique constraint on this source. Call once for each unique |
988bf309 |
245 | constraint. Unique constraints are used when you call C<find> on a |
958916aa |
246 | L<DBIx::Class::ResultSet>, only columns in the constraint are searched, |
87f0da6a |
247 | |
248 | # For e.g. UNIQUE (column1, column2) |
249 | __PACKAGE__->add_unique_constraint(constraint_name => [ qw/column1 column2/ ]); |
250 | |
251 | =cut |
252 | |
253 | sub add_unique_constraint { |
254 | my ($self, $name, $cols) = @_; |
255 | |
8e04bf91 |
256 | foreach my $col (@$cols) { |
257 | $self->throw_exception("No such column $col on table " . $self->name) |
258 | unless $self->has_column($col); |
87f0da6a |
259 | } |
260 | |
261 | my %unique_constraints = $self->unique_constraints; |
262 | $unique_constraints{$name} = $cols; |
263 | $self->_unique_constraints(\%unique_constraints); |
264 | } |
265 | |
266 | =head2 unique_constraints |
267 | |
268 | Read-only accessor which returns the list of unique constraints on this source. |
269 | |
270 | =cut |
271 | |
272 | sub unique_constraints { |
273 | return %{shift->_unique_constraints||{}}; |
274 | } |
275 | |
9c992ba1 |
276 | =head2 from |
277 | |
278 | Returns an expression of the source to be supplied to storage to specify |
279 | retrieval from this source; in the case of a database the required FROM clause |
280 | contents. |
281 | |
282 | =cut |
283 | |
284 | =head2 storage |
285 | |
988bf309 |
286 | Returns the storage handle for the current schema. |
287 | |
288 | See also: L<DBIx::Class::Storage> |
9c992ba1 |
289 | |
290 | =cut |
291 | |
292 | sub storage { shift->schema->storage; } |
293 | |
8452e496 |
294 | =head2 add_relationship |
295 | |
296 | $source->add_relationship('relname', 'related_source', $cond, $attrs); |
297 | |
298 | The relation name can be arbitrary, but must be unique for each relationship |
299 | attached to this result source. 'related_source' should be the name with |
300 | which the related result source was registered with the current schema |
301 | (for simple schemas this is usally either Some::Namespace::Foo or just Foo) |
302 | |
303 | The condition needs to be an SQL::Abstract-style representation of the join |
988bf309 |
304 | between the tables. For example, if you're creating a rel from Author to Book, |
305 | |
306 | { 'foreign.author_id' => 'self.id' } |
307 | |
308 | will result in the JOIN clause |
309 | |
310 | author me JOIN book foreign ON foreign.author_id = me.id |
311 | |
8452e496 |
312 | You can specify as many foreign => self mappings as necessary. |
313 | |
988bf309 |
314 | Valid attributes are as follows: |
315 | |
316 | =over 4 |
317 | |
318 | =item join_type |
319 | |
320 | Explicitly specifies the type of join to use in the relationship. Any |
321 | SQL join type is valid, e.g. C<LEFT> or C<RIGHT>. It will be placed in |
322 | the SQL command immediately before C<JOIN>. |
323 | |
324 | =item proxy |
325 | |
326 | An arrayref containing a list of accessors in the foreign class to |
327 | proxy in the main class. If, for example, you do the following: |
328 | |
329 | __PACKAGE__->might_have(bar => 'Bar', undef, { proxy => [ qw/margle/] }); |
330 | |
331 | Then, assuming Bar has an accessor named margle, you can do: |
332 | |
333 | my $obj = Foo->find(1); |
334 | $obj->margle(10); # set margle; Bar object is created if it doesn't exist |
335 | |
336 | =item accessor |
337 | |
338 | Specifies the type of accessor that should be created for the |
339 | relationship. Valid values are C<single> (for when there is only a single |
340 | related object), C<multi> (when there can be many), and C<filter> (for |
341 | when there is a single related object, but you also want the relationship |
342 | accessor to double as a column accessor). For C<multi> accessors, an |
343 | add_to_* method is also created, which calls C<create_related> for the |
344 | relationship. |
345 | |
8452e496 |
346 | =back |
347 | |
348 | =cut |
349 | |
350 | sub add_relationship { |
351 | my ($self, $rel, $f_source_name, $cond, $attrs) = @_; |
701da8c4 |
352 | $self->throw_exception("Can't create relationship without join condition") unless $cond; |
8452e496 |
353 | $attrs ||= {}; |
87772e46 |
354 | |
8452e496 |
355 | my %rels = %{ $self->_relationships }; |
356 | $rels{$rel} = { class => $f_source_name, |
87772e46 |
357 | source => $f_source_name, |
8452e496 |
358 | cond => $cond, |
359 | attrs => $attrs }; |
360 | $self->_relationships(\%rels); |
361 | |
30126ac7 |
362 | return $self; |
87772e46 |
363 | |
953a18ef |
364 | # XXX disabled. doesn't work properly currently. skip in tests. |
365 | |
8452e496 |
366 | my $f_source = $self->schema->source($f_source_name); |
367 | unless ($f_source) { |
368 | eval "require $f_source_name;"; |
369 | if ($@) { |
370 | die $@ unless $@ =~ /Can't locate/; |
371 | } |
372 | $f_source = $f_source_name->result_source; |
87772e46 |
373 | #my $s_class = ref($self->schema); |
374 | #$f_source_name =~ m/^${s_class}::(.*)$/; |
375 | #$self->schema->register_class(($1 || $f_source_name), $f_source_name); |
376 | #$f_source = $self->schema->source($f_source_name); |
8452e496 |
377 | } |
378 | return unless $f_source; # Can't test rel without f_source |
379 | |
380 | eval { $self->resolve_join($rel, 'me') }; |
381 | |
382 | if ($@) { # If the resolve failed, back out and re-throw the error |
383 | delete $rels{$rel}; # |
384 | $self->_relationships(\%rels); |
701da8c4 |
385 | $self->throw_exception("Error creating relationship $rel: $@"); |
8452e496 |
386 | } |
387 | 1; |
388 | } |
389 | |
87c4e602 |
390 | =head2 relationships |
8452e496 |
391 | |
392 | Returns all valid relationship names for this source |
393 | |
394 | =cut |
395 | |
396 | sub relationships { |
397 | return keys %{shift->_relationships}; |
398 | } |
399 | |
87c4e602 |
400 | =head2 relationship_info |
401 | |
402 | =head3 Arguments: ($relname) |
8452e496 |
403 | |
404 | Returns the relationship information for the specified relationship name |
405 | |
406 | =cut |
407 | |
408 | sub relationship_info { |
409 | my ($self, $rel) = @_; |
410 | return $self->_relationships->{$rel}; |
411 | } |
412 | |
87c4e602 |
413 | =head2 has_relationship |
414 | |
415 | =head3 Arguments: ($rel) |
953a18ef |
416 | |
417 | Returns 1 if the source has a relationship of this name, 0 otherwise. |
988bf309 |
418 | |
419 | =cut |
953a18ef |
420 | |
421 | sub has_relationship { |
422 | my ($self, $rel) = @_; |
423 | return exists $self->_relationships->{$rel}; |
424 | } |
425 | |
87c4e602 |
426 | =head2 resolve_join |
427 | |
428 | =head3 Arguments: ($relation) |
8452e496 |
429 | |
430 | Returns the join structure required for the related result source |
431 | |
432 | =cut |
433 | |
434 | sub resolve_join { |
489709af |
435 | my ($self, $join, $alias, $seen) = @_; |
436 | $seen ||= {}; |
87772e46 |
437 | if (ref $join eq 'ARRAY') { |
489709af |
438 | return map { $self->resolve_join($_, $alias, $seen) } @$join; |
87772e46 |
439 | } elsif (ref $join eq 'HASH') { |
489709af |
440 | return |
887ce227 |
441 | map { |
442 | my $as = ($seen->{$_} ? $_.'_'.($seen->{$_}+1) : $_); |
443 | ($self->resolve_join($_, $alias, $seen), |
444 | $self->related_source($_)->resolve_join($join->{$_}, $as, $seen)); |
445 | } keys %$join; |
87772e46 |
446 | } elsif (ref $join) { |
701da8c4 |
447 | $self->throw_exception("No idea how to resolve join reftype ".ref $join); |
87772e46 |
448 | } else { |
489709af |
449 | my $count = ++$seen->{$join}; |
450 | #use Data::Dumper; warn Dumper($seen); |
451 | my $as = ($count > 1 ? "${join}_${count}" : $join); |
3842b955 |
452 | my $rel_info = $self->relationship_info($join); |
701da8c4 |
453 | $self->throw_exception("No such relationship ${join}") unless $rel_info; |
3842b955 |
454 | my $type = $rel_info->{attrs}{join_type} || ''; |
489709af |
455 | return [ { $as => $self->related_source($join)->from, |
953a18ef |
456 | -join_type => $type }, |
489709af |
457 | $self->resolve_condition($rel_info->{cond}, $as, $alias) ]; |
953a18ef |
458 | } |
459 | } |
460 | |
87c4e602 |
461 | =head2 resolve_condition |
462 | |
463 | =head3 Arguments: ($cond, $as, $alias|$object) |
953a18ef |
464 | |
3842b955 |
465 | Resolves the passed condition to a concrete query fragment. If given an alias, |
953a18ef |
466 | returns a join condition; if given an object, inverts that object to produce |
467 | a related conditional from that object. |
468 | |
469 | =cut |
470 | |
471 | sub resolve_condition { |
489709af |
472 | my ($self, $cond, $as, $for) = @_; |
953a18ef |
473 | #warn %$cond; |
474 | if (ref $cond eq 'HASH') { |
475 | my %ret; |
476 | while (my ($k, $v) = each %{$cond}) { |
477 | # XXX should probably check these are valid columns |
701da8c4 |
478 | $k =~ s/^foreign\.// || $self->throw_exception("Invalid rel cond key ${k}"); |
479 | $v =~ s/^self\.// || $self->throw_exception("Invalid rel cond val ${v}"); |
953a18ef |
480 | if (ref $for) { # Object |
3842b955 |
481 | #warn "$self $k $for $v"; |
482 | $ret{$k} = $for->get_column($v); |
483 | #warn %ret; |
fde6e28e |
484 | } elsif (ref $as) { # reverse object |
485 | $ret{$v} = $as->get_column($k); |
953a18ef |
486 | } else { |
489709af |
487 | $ret{"${as}.${k}"} = "${for}.${v}"; |
953a18ef |
488 | } |
953a18ef |
489 | } |
490 | return \%ret; |
5efe4c79 |
491 | } elsif (ref $cond eq 'ARRAY') { |
489709af |
492 | return [ map { $self->resolve_condition($_, $as, $for) } @$cond ]; |
953a18ef |
493 | } else { |
494 | die("Can't handle this yet :("); |
87772e46 |
495 | } |
496 | } |
497 | |
87c4e602 |
498 | =head2 resolve_prefetch |
499 | |
500 | =head3 Arguments: (hashref/arrayref/scalar) |
988bf309 |
501 | |
b3e8ac9b |
502 | Accepts one or more relationships for the current source and returns an |
503 | array of column names for each of those relationships. Column names are |
504 | prefixed relative to the current source, in accordance with where they appear |
505 | in the supplied relationships. Examples: |
506 | |
5ac6a044 |
507 | my $source = $schema->resultset('Tag')->source; |
b3e8ac9b |
508 | @columns = $source->resolve_prefetch( { cd => 'artist' } ); |
509 | |
510 | # @columns = |
511 | #( |
512 | # 'cd.cdid', |
513 | # 'cd.artist', |
514 | # 'cd.title', |
515 | # 'cd.year', |
516 | # 'cd.artist.artistid', |
517 | # 'cd.artist.name' |
518 | #) |
519 | |
520 | @columns = $source->resolve_prefetch( qw[/ cd /] ); |
521 | |
522 | # @columns = |
523 | #( |
524 | # 'cd.cdid', |
525 | # 'cd.artist', |
526 | # 'cd.title', |
527 | # 'cd.year' |
528 | #) |
529 | |
530 | $source = $schema->resultset('CD')->source; |
531 | @columns = $source->resolve_prefetch( qw[/ artist producer /] ); |
532 | |
533 | # @columns = |
534 | #( |
535 | # 'artist.artistid', |
536 | # 'artist.name', |
537 | # 'producer.producerid', |
538 | # 'producer.name' |
539 | #) |
988bf309 |
540 | |
b3e8ac9b |
541 | =cut |
542 | |
543 | sub resolve_prefetch { |
0f66a01b |
544 | my ($self, $pre, $alias, $seen, $order, $collapse) = @_; |
489709af |
545 | $seen ||= {}; |
b3e8ac9b |
546 | #$alias ||= $self->name; |
547 | #warn $alias, Dumper $pre; |
548 | if( ref $pre eq 'ARRAY' ) { |
0f66a01b |
549 | return |
550 | map { $self->resolve_prefetch( $_, $alias, $seen, $order, $collapse ) } |
551 | @$pre; |
b3e8ac9b |
552 | } |
553 | elsif( ref $pre eq 'HASH' ) { |
554 | my @ret = |
555 | map { |
0f66a01b |
556 | $self->resolve_prefetch($_, $alias, $seen, $order, $collapse), |
489709af |
557 | $self->related_source($_)->resolve_prefetch( |
0f66a01b |
558 | $pre->{$_}, "${alias}.$_", $seen, $order, $collapse) |
559 | } keys %$pre; |
b3e8ac9b |
560 | #die Dumper \@ret; |
561 | return @ret; |
562 | } |
563 | elsif( ref $pre ) { |
a86b1efe |
564 | $self->throw_exception( |
565 | "don't know how to resolve prefetch reftype ".ref($pre)); |
b3e8ac9b |
566 | } |
567 | else { |
489709af |
568 | my $count = ++$seen->{$pre}; |
569 | my $as = ($count > 1 ? "${pre}_${count}" : $pre); |
b3e8ac9b |
570 | my $rel_info = $self->relationship_info( $pre ); |
a86b1efe |
571 | $self->throw_exception( $self->name . " has no such relationship '$pre'" ) |
572 | unless $rel_info; |
37f23589 |
573 | my $as_prefix = ($alias =~ /^.*?\.(.+)$/ ? $1.'.' : ''); |
a86b1efe |
574 | my $rel_source = $self->related_source($pre); |
0f66a01b |
575 | |
576 | if (exists $rel_info->{attrs}{accessor} |
577 | && $rel_info->{attrs}{accessor} eq 'multi') { |
578 | $self->throw_exception( |
579 | "Can't prefetch has_many ${pre} (join cond too complex)") |
580 | unless ref($rel_info->{cond}) eq 'HASH'; |
37f23589 |
581 | my @key = map { (/^foreign\.(.+)$/ ? ($1) : ()); } |
0f66a01b |
582 | keys %{$rel_info->{cond}}; |
583 | $collapse->{"${as_prefix}${pre}"} = \@key; |
5a5bec6c |
584 | my @ord = (ref($rel_info->{attrs}{order_by}) eq 'ARRAY' |
585 | ? @{$rel_info->{attrs}{order_by}} |
586 | : (defined $rel_info->{attrs}{order_by} |
587 | ? ($rel_info->{attrs}{order_by}) |
588 | : ())); |
589 | push(@$order, map { "${as}.$_" } (@key, @ord)); |
0f66a01b |
590 | } |
591 | |
489709af |
592 | return map { [ "${as}.$_", "${as_prefix}${pre}.$_", ] } |
a86b1efe |
593 | $rel_source->columns; |
b3e8ac9b |
594 | #warn $alias, Dumper (\@ret); |
489709af |
595 | #return @ret; |
b3e8ac9b |
596 | } |
597 | } |
953a18ef |
598 | |
87c4e602 |
599 | =head2 related_source |
600 | |
601 | =head3 Arguments: ($relname) |
87772e46 |
602 | |
988bf309 |
603 | Returns the result source object for the given relationship |
87772e46 |
604 | |
605 | =cut |
606 | |
607 | sub related_source { |
608 | my ($self, $rel) = @_; |
aea52c85 |
609 | if( !$self->has_relationship( $rel ) ) { |
701da8c4 |
610 | $self->throw_exception("No such relationship '$rel'"); |
aea52c85 |
611 | } |
87772e46 |
612 | return $self->schema->source($self->relationship_info($rel)->{source}); |
8452e496 |
613 | } |
614 | |
5ac6a044 |
615 | =head2 resultset |
616 | |
988bf309 |
617 | Returns a resultset for the given source, by calling: |
5ac6a044 |
618 | |
988bf309 |
619 | $self->resultset_class->new($self, $self->resultset_attributes) |
5ac6a044 |
620 | |
621 | =head2 resultset_class |
622 | |
988bf309 |
623 | Set the class of the resultset, this is useful if you want to create your |
624 | own resultset methods. Create your own class derived from |
625 | L<DBIx::Class::ResultSet>, and set it here. |
5ac6a044 |
626 | |
627 | =head2 resultset_attributes |
628 | |
988bf309 |
629 | Specify here any attributes you wish to pass to your specialised resultset. |
5ac6a044 |
630 | |
631 | =cut |
632 | |
633 | sub resultset { |
634 | my $self = shift; |
e0f56292 |
635 | $self->throw_exception('resultset does not take any arguments. If you want another resultset, call it on the schema instead.') if scalar @_; |
1225fc4d |
636 | return $self->{_resultset} if ref $self->{_resultset} eq $self->resultset_class; |
637 | return $self->{_resultset} = do { |
638 | my $rs = $self->resultset_class->new($self, $self->{resultset_attributes}); |
639 | weaken $rs->result_source; |
640 | $rs; |
641 | }; |
5ac6a044 |
642 | } |
643 | |
701da8c4 |
644 | =head2 throw_exception |
645 | |
988bf309 |
646 | See throw_exception in L<DBIx::Class::Schema>. |
701da8c4 |
647 | |
648 | =cut |
649 | |
650 | sub throw_exception { |
651 | my $self = shift; |
652 | if (defined $self->schema) { |
653 | $self->schema->throw_exception(@_); |
654 | } else { |
655 | croak(@_); |
656 | } |
657 | } |
658 | |
659 | |
9c992ba1 |
660 | =head1 AUTHORS |
661 | |
662 | Matt S. Trout <mst@shadowcatsystems.co.uk> |
663 | |
664 | =head1 LICENSE |
665 | |
666 | You may distribute this code under the same terms as Perl itself. |
667 | |
668 | =cut |
669 | |