Commit | Line | Data |
3c5de62a |
1 | package SQL::Translator::Schema::Field; |
2 | |
3c5de62a |
3 | =pod |
4 | |
5 | =head1 NAME |
6 | |
7 | SQL::Translator::Schema::Field - SQL::Translator field object |
8 | |
9 | =head1 SYNOPSIS |
10 | |
11 | use SQL::Translator::Schema::Field; |
12 | my $field = SQL::Translator::Schema::Field->new( |
b9dc0b40 |
13 | name => 'foo', |
14 | table => $table, |
3c5de62a |
15 | ); |
16 | |
17 | =head1 DESCRIPTION |
18 | |
19 | C<SQL::Translator::Schema::Field> is the field object. |
20 | |
21 | =head1 METHODS |
22 | |
23 | =cut |
24 | |
a14ab50e |
25 | use Moo; |
43b9dc7a |
26 | use SQL::Translator::Schema::Constants; |
a14ab50e |
27 | use SQL::Translator::Types qw(schema_obj); |
28 | use SQL::Translator::Utils qw(parse_list_arg ex2err throw); |
3c5de62a |
29 | |
a14ab50e |
30 | with qw( |
45595850 |
31 | SQL::Translator::Role::Error |
32 | SQL::Translator::Role::BuildArgs |
a14ab50e |
33 | SQL::Translator::Schema::Role::Extra |
a14ab50e |
34 | SQL::Translator::Schema::Role::Compare |
35 | ); |
b6a880d1 |
36 | |
0c04c5a2 |
37 | our $VERSION = '1.59'; |
65dd38c0 |
38 | |
39 | # Stringify to our name, being careful not to pass any args through so we don't |
40 | # accidentally set it to undef. We also have to tweak bool so the object is |
41 | # still true when it doesn't have a name (which shouldn't happen!). |
42 | use overload |
43 | '""' => sub { shift->name }, |
44 | 'bool' => sub { $_[0]->name || $_[0] }, |
45 | fallback => 1, |
46 | ; |
3c5de62a |
47 | |
9ab59f87 |
48 | use DBI qw(:sql_types); |
49 | |
50 | # Mapping from string to sql contstant |
51 | our %type_mapping = ( |
52 | integer => SQL_INTEGER, |
53 | int => SQL_INTEGER, |
54 | |
55 | smallint => SQL_SMALLINT, |
56 | bigint => 9999, # DBI doesn't export a constatn for this. Le suck |
57 | |
58 | double => SQL_DOUBLE, |
59 | |
60 | decimal => SQL_DECIMAL, |
61 | numeric => SQL_NUMERIC, |
62 | dec => SQL_DECIMAL, |
63 | |
64 | bit => SQL_BIT, |
65 | |
66 | date => SQL_DATE, |
67 | datetime => SQL_DATETIME, |
68 | timestamp => SQL_TIMESTAMP, |
69 | time => SQL_TIME, |
70 | |
71 | char => SQL_CHAR, |
72 | varchar => SQL_VARCHAR, |
73 | binary => SQL_BINARY, |
74 | varbinary => SQL_VARBINARY, |
75 | tinyblob => SQL_BLOB, |
76 | blob => SQL_BLOB, |
77 | text => SQL_LONGVARCHAR |
78 | |
79 | ); |
9371be50 |
80 | |
3c5de62a |
81 | =head2 new |
82 | |
83 | Object constructor. |
84 | |
0bf88ce5 |
85 | my $field = SQL::Translator::Schema::Field->new( |
86 | name => 'foo', |
87 | table => $table, |
b9dc0b40 |
88 | ); |
3c5de62a |
89 | |
5ac417ad |
90 | =head2 comments |
91 | |
ea93df61 |
92 | Get or set the comments on a field. May be called several times to |
5ac417ad |
93 | set and it will accumulate the comments. Called in an array context, |
94 | returns each comment individually; called in a scalar context, returns |
95 | all the comments joined on newlines. |
96 | |
97 | $field->comments('foo'); |
98 | $field->comments('bar'); |
99 | print join( ', ', $field->comments ); # prints "foo, bar" |
100 | |
101 | =cut |
102 | |
a14ab50e |
103 | has comments => ( |
104 | is => 'rw', |
105 | coerce => sub { ref($_[0]) eq 'ARRAY' ? $_[0] : [$_[0]] }, |
106 | default => sub { [] }, |
107 | ); |
108 | |
109 | around comments => sub { |
110 | my $orig = shift; |
5ac417ad |
111 | my $self = shift; |
aadf4042 |
112 | |
113 | for my $arg ( @_ ) { |
114 | $arg = $arg->[0] if ref $arg; |
a14ab50e |
115 | push @{ $self->$orig }, $arg if $arg; |
c33df5c4 |
116 | } |
5ac417ad |
117 | |
a14ab50e |
118 | return wantarray |
119 | ? @{ $self->$orig } |
120 | : join( "\n", @{ $self->$orig } ); |
121 | }; |
3c5de62a |
122 | |
3c5de62a |
123 | |
124 | =head2 data_type |
125 | |
43b9dc7a |
126 | Get or set the field's data type. |
3c5de62a |
127 | |
128 | my $data_type = $field->data_type('integer'); |
129 | |
130 | =cut |
131 | |
a14ab50e |
132 | has data_type => ( is => 'rw', default => sub { '' } ); |
6b2dbb1a |
133 | |
134 | =head2 sql_data_type |
135 | |
136 | Constant from DBI package representing this data type. See L<DBI/DBI Constants> |
137 | for more details. |
138 | |
139 | =cut |
140 | |
a14ab50e |
141 | has sql_data_type => ( is => 'rw', lazy => 1, builder => 1 ); |
6b2dbb1a |
142 | |
a14ab50e |
143 | sub _build_sql_data_type { |
144 | $type_mapping{lc $_[0]->data_type} || SQL_UNKNOWN_TYPE; |
6b2dbb1a |
145 | } |
146 | |
43b9dc7a |
147 | =head2 default_value |
148 | |
149 | Get or set the field's default value. Will return undef if not defined |
ea93df61 |
150 | and could return the empty string (it's a valid default value), so don't |
43b9dc7a |
151 | assume an error like other methods. |
152 | |
153 | my $default = $field->default_value('foo'); |
154 | |
155 | =cut |
156 | |
a14ab50e |
157 | has default_value => ( is => 'rw' ); |
9966eebc |
158 | |
159 | =head2 extra |
160 | |
161 | Get or set the field's "extra" attibutes (e.g., "ZEROFILL" for MySQL). |
162 | Accepts a hash(ref) of name/value pairs to store; returns a hash. |
163 | |
164 | $field->extra( qualifier => 'ZEROFILL' ); |
165 | my %extra = $field->extra; |
166 | |
167 | =cut |
168 | |
9966eebc |
169 | =head2 foreign_key_reference |
170 | |
171 | Get or set the field's foreign key reference; |
172 | |
173 | my $constraint = $field->foreign_key_reference( $constraint ); |
174 | |
175 | =cut |
176 | |
a14ab50e |
177 | has foreign_key_reference => ( |
178 | is => 'rw', |
179 | predicate => '_has_foreign_key_reference', |
180 | isa => schema_obj('Constraint'), |
a5bfeba8 |
181 | weak_ref => 1, |
a14ab50e |
182 | ); |
183 | |
184 | around foreign_key_reference => sub { |
185 | my $orig = shift; |
9966eebc |
186 | my $self = shift; |
187 | |
188 | if ( my $arg = shift ) { |
a14ab50e |
189 | return $self->error( |
190 | 'Foreign key reference for ', $self->name, 'already defined' |
191 | ) if $self->_has_foreign_key_reference; |
9966eebc |
192 | |
a14ab50e |
193 | return ex2err($orig, $self, $arg); |
9966eebc |
194 | } |
a14ab50e |
195 | $self->$orig; |
196 | }; |
43b9dc7a |
197 | |
198 | =head2 is_auto_increment |
199 | |
200 | Get or set the field's C<is_auto_increment> attribute. |
201 | |
b9dc0b40 |
202 | my $is_auto = $field->is_auto_increment(1); |
43b9dc7a |
203 | |
204 | =cut |
205 | |
a14ab50e |
206 | has is_auto_increment => ( |
207 | is => 'rw', |
208 | coerce => sub { $_[0] ? 1 : 0 }, |
209 | builder => 1, |
210 | lazy => 1, |
211 | ); |
43b9dc7a |
212 | |
a14ab50e |
213 | sub _build_is_auto_increment { |
214 | my ( $self ) = @_; |
43b9dc7a |
215 | |
a14ab50e |
216 | if ( my $table = $self->table ) { |
217 | if ( my $schema = $table->schema ) { |
218 | if ( |
219 | $schema->database eq 'PostgreSQL' && |
220 | $self->data_type eq 'serial' |
221 | ) { |
222 | return 1; |
43b9dc7a |
223 | } |
224 | } |
225 | } |
a14ab50e |
226 | return 0; |
43b9dc7a |
227 | } |
228 | |
9966eebc |
229 | =head2 is_foreign_key |
230 | |
231 | Returns whether or not the field is a foreign key. |
232 | |
233 | my $is_fk = $field->is_foreign_key; |
234 | |
235 | =cut |
236 | |
a14ab50e |
237 | has is_foreign_key => ( |
238 | is => 'rw', |
239 | coerce => sub { $_[0] ? 1 : 0 }, |
240 | builder => 1, |
241 | lazy => 1, |
242 | ); |
243 | |
244 | sub _build_is_foreign_key { |
245 | my ( $self ) = @_; |
246 | |
247 | if ( my $table = $self->table ) { |
248 | for my $c ( $table->get_constraints ) { |
249 | if ( $c->type eq FOREIGN_KEY ) { |
250 | my %fields = map { $_, 1 } $c->fields; |
251 | if ( $fields{ $self->name } ) { |
252 | $self->foreign_key_reference( $c ); |
253 | return 1; |
9966eebc |
254 | } |
255 | } |
256 | } |
257 | } |
a14ab50e |
258 | return 0; |
9966eebc |
259 | } |
260 | |
ec2ab48d |
261 | =head2 is_nullable |
262 | |
ea93df61 |
263 | Get or set whether the field can be null. If not defined, then |
ec2ab48d |
264 | returns "1" (assumes the field can be null). The argument is evaluated |
265 | by Perl for True or False, so the following are eqivalent: |
266 | |
267 | $is_nullable = $field->is_nullable(0); |
268 | $is_nullable = $field->is_nullable(''); |
269 | $is_nullable = $field->is_nullable('0'); |
270 | |
271 | While this is technically a field constraint, it's probably easier to |
272 | represent this as an attribute of the field. In order keep things |
273 | consistent, any other constraint on the field (unique, primary, and |
274 | foreign keys; checks) are represented as table constraints. |
275 | |
276 | =cut |
277 | |
a14ab50e |
278 | has is_nullable => ( |
279 | is => 'rw', |
280 | coerce => sub { $_[0] ? 1 : 0 }, |
281 | default => sub { 1 }, |
282 | ); |
ec2ab48d |
283 | |
a14ab50e |
284 | around is_nullable => sub { |
285 | my ($orig, $self, $arg) = @_; |
ec2ab48d |
286 | |
a14ab50e |
287 | $self->$orig($self->is_primary_key ? 0 : defined $arg ? $arg : ()); |
288 | }; |
3c5de62a |
289 | |
290 | =head2 is_primary_key |
291 | |
ec2ab48d |
292 | Get or set the field's C<is_primary_key> attribute. Does not create |
293 | a table constraint (should it?). |
3c5de62a |
294 | |
295 | my $is_pk = $field->is_primary_key(1); |
296 | |
297 | =cut |
298 | |
a14ab50e |
299 | has is_primary_key => ( |
300 | is => 'rw', |
301 | coerce => sub { $_[0] ? 1 : 0 }, |
302 | lazy => 1, |
303 | builder => 1, |
304 | ); |
3c5de62a |
305 | |
a14ab50e |
306 | sub _build_is_primary_key { |
307 | my ( $self ) = @_; |
3c5de62a |
308 | |
a14ab50e |
309 | if ( my $table = $self->table ) { |
310 | if ( my $pk = $table->primary_key ) { |
311 | my %fields = map { $_, 1 } $pk->fields; |
312 | return $fields{ $self->name } || 0; |
43b9dc7a |
313 | } |
314 | } |
a14ab50e |
315 | return 0; |
3c5de62a |
316 | } |
317 | |
ee2766f4 |
318 | =head2 is_unique |
319 | |
320 | Determine whether the field has a UNIQUE constraint or not. |
321 | |
322 | my $is_unique = $field->is_unique; |
323 | |
324 | =cut |
325 | |
a14ab50e |
326 | has is_unique => ( is => 'lazy', init_arg => undef ); |
ea93df61 |
327 | |
a14ab50e |
328 | sub _build_is_unique { |
329 | my ( $self ) = @_; |
330 | |
331 | if ( my $table = $self->table ) { |
332 | for my $c ( $table->get_constraints ) { |
333 | if ( $c->type eq UNIQUE ) { |
334 | my %fields = map { $_, 1 } $c->fields; |
335 | if ( $fields{ $self->name } ) { |
336 | return 1; |
ee2766f4 |
337 | } |
338 | } |
339 | } |
340 | } |
a14ab50e |
341 | return 0; |
ee2766f4 |
342 | } |
343 | |
ec2ab48d |
344 | sub is_valid { |
345 | |
346 | =pod |
347 | |
348 | =head2 is_valid |
349 | |
350 | Determine whether the field is valid or not. |
351 | |
352 | my $ok = $field->is_valid; |
353 | |
354 | =cut |
355 | |
356 | my $self = shift; |
357 | return $self->error('No name') unless $self->name; |
358 | return $self->error('No data type') unless $self->data_type; |
359 | return $self->error('No table object') unless $self->table; |
360 | return 1; |
361 | } |
362 | |
3c5de62a |
363 | =head2 name |
364 | |
365 | Get or set the field's name. |
366 | |
65dd38c0 |
367 | my $name = $field->name('foo'); |
368 | |
369 | The field object will also stringify to its name. |
370 | |
371 | my $setter_name = "set_$field"; |
372 | |
373 | Errors ("No field name") if you try to set a blank name. |
3c5de62a |
374 | |
375 | =cut |
376 | |
a14ab50e |
377 | has name => ( is => 'rw', isa => sub { throw( "No field name" ) unless $_[0] } ); |
378 | |
379 | around name => sub { |
380 | my $orig = shift; |
3c5de62a |
381 | my $self = shift; |
43b9dc7a |
382 | |
a14ab50e |
383 | if ( my ($arg) = @_ ) { |
384 | if ( my $schema = $self->table ) { |
65dd38c0 |
385 | return $self->error( qq[Can't use field name "$arg": field exists] ) |
a14ab50e |
386 | if $schema->get_field( $arg ); |
43b9dc7a |
387 | } |
43b9dc7a |
388 | } |
389 | |
a14ab50e |
390 | return ex2err($orig, $self, @_); |
391 | }; |
3c5de62a |
392 | |
4809213f |
393 | sub full_name { |
394 | |
395 | =head2 full_name |
396 | |
397 | Read only method to return the fields name with its table name pre-pended. |
398 | e.g. "person.foo". |
399 | |
400 | =cut |
401 | |
402 | my $self = shift; |
403 | return $self->table.".".$self->name; |
404 | } |
405 | |
ec2ab48d |
406 | =head2 order |
3c5de62a |
407 | |
ec2ab48d |
408 | Get or set the field's order. |
3c5de62a |
409 | |
ec2ab48d |
410 | my $order = $field->order(3); |
3c5de62a |
411 | |
412 | =cut |
413 | |
a14ab50e |
414 | has order => ( is => 'rw', default => sub { 0 } ); |
415 | |
416 | around order => sub { |
417 | my ( $orig, $self, $arg ) = @_; |
3c5de62a |
418 | |
ec2ab48d |
419 | if ( defined $arg && $arg =~ /^\d+$/ ) { |
a14ab50e |
420 | return $self->$orig($arg); |
3c5de62a |
421 | } |
422 | |
a14ab50e |
423 | return $self->$orig; |
424 | }; |
43b9dc7a |
425 | |
c1e3c768 |
426 | sub schema { |
427 | |
ea93df61 |
428 | =head2 schema |
c1e3c768 |
429 | |
430 | Shortcut to get the fields schema ($field->table->schema) or undef if it |
431 | doesn't have one. |
432 | |
433 | my $schema = $field->schema; |
434 | |
435 | =cut |
436 | |
437 | my $self = shift; |
438 | if ( my $table = $self->table ) { return $table->schema || undef; } |
439 | return undef; |
440 | } |
441 | |
43b9dc7a |
442 | =head2 size |
443 | |
444 | Get or set the field's size. Accepts a string, array or arrayref of |
445 | numbers and returns a string. |
446 | |
447 | $field->size( 30 ); |
448 | $field->size( [ 255 ] ); |
449 | $size = $field->size( 10, 2 ); |
450 | print $size; # prints "10,2" |
451 | |
452 | $size = $field->size( '10, 2' ); |
453 | print $size; # prints "10,2" |
454 | |
455 | =cut |
456 | |
a14ab50e |
457 | has size => ( |
458 | is => 'rw', |
459 | default => sub { [0] }, |
460 | coerce => sub { |
461 | my @sizes = grep { defined && m/^\d+(?:\.\d+)?$/ } @{parse_list_arg($_[0])}; |
462 | @sizes ? \@sizes : [0]; |
463 | }, |
464 | ); |
465 | |
466 | around size => sub { |
467 | my $orig = shift; |
43b9dc7a |
468 | my $self = shift; |
ec2ab48d |
469 | my $numbers = parse_list_arg( @_ ); |
43b9dc7a |
470 | |
471 | if ( @$numbers ) { |
472 | my @new; |
473 | for my $num ( @$numbers ) { |
474 | if ( defined $num && $num =~ m/^\d+(?:\.\d+)?$/ ) { |
475 | push @new, $num; |
476 | } |
477 | } |
a14ab50e |
478 | $self->$orig(\@new) if @new; # only set if all OK |
43b9dc7a |
479 | } |
480 | |
ea93df61 |
481 | return wantarray |
a14ab50e |
482 | ? @{ $self->$orig || [0] } |
483 | : join( ',', @{ $self->$orig || [0] } ) |
ec2ab48d |
484 | ; |
a14ab50e |
485 | }; |
43b9dc7a |
486 | |
487 | =head2 table |
488 | |
b9dc0b40 |
489 | Get or set the field's table object. As the table object stringifies this can |
490 | also be used to get the table name. |
43b9dc7a |
491 | |
492 | my $table = $field->table; |
b9dc0b40 |
493 | print "Table name: $table"; |
43b9dc7a |
494 | |
495 | =cut |
496 | |
a5bfeba8 |
497 | has table => ( is => 'rw', isa => schema_obj('Table'), weak_ref => 1 ); |
43b9dc7a |
498 | |
a14ab50e |
499 | around table => \&ex2err; |
07d6e5f7 |
500 | |
ea93df61 |
501 | =head2 |
07d6e5f7 |
502 | |
503 | Returns the field exactly as the parser found it |
504 | |
505 | =cut |
506 | |
a14ab50e |
507 | has parsed_field => ( is => 'rw' ); |
07d6e5f7 |
508 | |
a14ab50e |
509 | around parsed_field => sub { |
510 | my $orig = shift; |
511 | my $self = shift; |
abf315bb |
512 | |
a14ab50e |
513 | return $self->$orig(@_) || $self; |
514 | }; |
abf315bb |
515 | |
516 | =head2 equals |
517 | |
518 | Determines if this field is the same as another |
519 | |
520 | my $isIdentical = $field1->equals( $field2 ); |
521 | |
522 | =cut |
523 | |
a14ab50e |
524 | around equals => sub { |
525 | my $orig = shift; |
abf315bb |
526 | my $self = shift; |
527 | my $other = shift; |
528 | my $case_insensitive = shift; |
ea93df61 |
529 | |
a14ab50e |
530 | return 0 unless $self->$orig($other); |
abf315bb |
531 | return 0 unless $case_insensitive ? uc($self->name) eq uc($other->name) : $self->name eq $other->name; |
6b2dbb1a |
532 | |
533 | # Comparing types: use sql_data_type if both are not 0. Else use string data_type |
534 | if ($self->sql_data_type && $other->sql_data_type) { |
535 | return 0 unless $self->sql_data_type == $other->sql_data_type |
536 | } else { |
537 | return 0 unless lc($self->data_type) eq lc($other->data_type) |
538 | } |
539 | |
abf315bb |
540 | return 0 unless $self->size eq $other->size; |
f5fd433f |
541 | |
542 | { |
543 | my $lhs = $self->default_value; |
544 | $lhs = \'NULL' unless defined $lhs; |
545 | my $lhs_is_ref = ! ! ref $lhs; |
546 | |
547 | my $rhs = $other->default_value; |
548 | $rhs = \'NULL' unless defined $rhs; |
549 | my $rhs_is_ref = ! ! ref $rhs; |
550 | |
551 | # If only one is a ref, fail. -- rjbs, 2008-12-02 |
552 | return 0 if $lhs_is_ref xor $rhs_is_ref; |
553 | |
554 | my $effective_lhs = $lhs_is_ref ? $$lhs : $lhs; |
555 | my $effective_rhs = $rhs_is_ref ? $$rhs : $rhs; |
556 | |
557 | return 0 if $effective_lhs ne $effective_rhs; |
558 | } |
559 | |
abf315bb |
560 | return 0 unless $self->is_nullable eq $other->is_nullable; |
afb07483 |
561 | # return 0 unless $self->is_unique eq $other->is_unique; |
abf315bb |
562 | return 0 unless $self->is_primary_key eq $other->is_primary_key; |
65e7a069 |
563 | # return 0 unless $self->is_foreign_key eq $other->is_foreign_key; |
abf315bb |
564 | return 0 unless $self->is_auto_increment eq $other->is_auto_increment; |
565 | # return 0 unless $self->comments eq $other->comments; |
4598b71c |
566 | return 0 unless $self->_compare_objects(scalar $self->extra, scalar $other->extra); |
abf315bb |
567 | return 1; |
a14ab50e |
568 | }; |
abf315bb |
569 | |
a14ab50e |
570 | # Must come after all 'has' declarations |
571 | around new => \&ex2err; |
572 | |
3c5de62a |
573 | 1; |
574 | |
3c5de62a |
575 | =pod |
576 | |
577 | =head1 AUTHOR |
578 | |
c3b0b535 |
579 | Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>. |
3c5de62a |
580 | |
581 | =cut |