1 package SL::DB::RequirementSpec;
6 use List::Util qw(max reduce);
7 use Rose::DB::Object::Helpers;
9 use SL::DB::MetaSetup::RequirementSpec;
10 use SL::DB::Manager::RequirementSpec;
11 use SL::DB::Helper::AttrDuration;
12 use SL::DB::Helper::CustomVariables (
13 module => 'RequirementSpecs',
16 use SL::DB::Helper::LinkedRecords;
17 use SL::Locale::String;
18 use SL::Util qw(_hashify);
20 __PACKAGE__->meta->add_relationship(
22 type => 'one to many',
23 class => 'SL::DB::RequirementSpecItem',
24 column_map => { id => 'requirement_spec_id' },
27 type => 'one to many',
28 class => 'SL::DB::RequirementSpecTextBlock',
29 column_map => { id => 'requirement_spec_id' },
32 type => 'one to many',
33 class => 'SL::DB::RequirementSpec',
34 column_map => { id => 'working_copy_id' },
37 type => 'one to many',
38 class => 'SL::DB::RequirementSpecVersion',
39 column_map => { id => 'requirement_spec_id' },
41 working_copy_versions => {
42 type => 'one to many',
43 class => 'SL::DB::RequirementSpecVersion',
44 column_map => { id => 'working_copy_id' },
47 type => 'one to many',
48 class => 'SL::DB::RequirementSpecOrder',
49 column_map => { id => 'requirement_spec_id' },
52 type => 'one to many',
53 class => 'SL::DB::RequirementSpecPart',
54 column_map => { id => 'requirement_spec_id' },
58 __PACKAGE__->meta->initialize;
60 __PACKAGE__->attr_duration(qw(time_estimation));
62 __PACKAGE__->before_save('_before_save_initialize_not_null_columns');
68 push @errors, t8('The title is missing.') if !$self->title;
73 sub _before_save_initialize_not_null_columns {
76 for (qw(previous_section_number previous_fb_number previous_picture_number)) {
77 $self->$_(0) if !defined $self->$_;
86 croak "Not a writer" if scalar(@_) > 1;
88 return $self->is_working_copy ? $self->working_copy_versions->[0] : $self->versions->[0];
91 sub text_blocks_sorted {
92 my ($self, %params) = _hashify(1, @_);
94 my @text_blocks = @{ $self->text_blocks };
95 @text_blocks = grep { $_->output_position == $params{output_position} } @text_blocks if exists $params{output_position};
96 @text_blocks = sort { $a->position <=> $b->position } @text_blocks;
101 sub sections_sorted {
102 my ($self, @rest) = @_;
104 croak "This sub is not a writer" if @rest;
106 return [ sort { $a->position <=> $b->position } grep { !$_->parent_id } @{ $self->items } ];
109 sub sections { §ions_sorted; }
112 my ($self, %params) = _hashify(1, @_);
113 my $by = $params{by} || 'itime';
115 return [ sort { $a->$by cmp $b->$by } @{ $self->orders } ];
118 sub displayable_name {
121 return sprintf('%s: "%s"', $self->type->description, $self->title);
124 sub versioned_copies_sorted {
125 my ($self, %params) = _hashify(1, @_);
127 my @copies = @{ $self->versioned_copies };
128 @copies = grep { $_->version->version_number <= $params{max_version_number} } @copies if $params{max_version_number};
129 @copies = sort { $a->version->version_number <=> $b->version->version_number } @copies;
135 my ($self, @rest) = @_;
137 croak "This sub is not a writer" if @rest;
139 return [ sort { $a->position <=> $b->position } @{ $self->parts } ];
143 my ($self, %params) = @_;
145 return $self->_create_copy(%params) if $self->db->in_transaction;
148 if (!$self->db->do_transaction(sub { $copy = $self->_create_copy(%params) })) {
149 $::lxdebug->message(LXDebug->WARN(), "create_copy failed: " . join("\n", (split(/\n/, $self->db->error))[0..2]));
157 my ($self, %params) = @_;
159 my $copy = Rose::DB::Object::Helpers::clone_and_reset($self);
160 $copy->copy_from($self, %params);
166 my ($self, $params, %attributes) = @_;
168 my $source = $params->{source};
170 croak "Missing parameter 'source'" unless $source;
173 if (!$params->{paste_template}) {
174 $self->assign_attributes(map({ ($_ => $source->$_) } qw(type_id status_id customer_id project_id title hourly_rate time_estimation previous_section_number previous_fb_number previous_picture_number is_template)),
178 # Copy custom variables.
179 foreach my $var (@{ $source->cvars_by_config }) {
180 $self->cvar_by_name($var->config->name)->value($var->value);
183 my %paste_template_result;
185 # Clone text blocks and pictures.
186 my $clone_and_reset_position = sub {
188 my $cloned = Rose::DB::Object::Helpers::clone_and_reset($src_obj);
189 $cloned->position(undef);
193 my $clone_text_block = sub {
194 my ($text_block) = @_;
195 my $cloned = Rose::DB::Object::Helpers::clone_and_reset($text_block);
196 $cloned->position(undef);
197 $cloned->pictures([ map { $clone_and_reset_position->($_) } @{ $text_block->pictures_sorted } ]);
201 $paste_template_result{text_blocks} = [ map { $clone_text_block->($_) } @{ $source->text_blocks_sorted } ];
203 if (!$params->{paste_template}) {
204 $self->text_blocks($paste_template_result{text_blocks});
206 $self->add_text_blocks($paste_template_result{text_blocks});
209 # Clone additional parts.
210 $paste_template_result{parts} = [ map { $clone_and_reset_position->($_) } @{ $source->parts } ];
211 my $accessor = $params->{paste_template} ? "add_parts" : "parts";
212 $self->$accessor($paste_template_result{parts});
214 # Save new object -- we need its ID for the items.
215 $self->save(cascade => 1);
223 my $cloned = Rose::DB::Object::Helpers::clone_and_reset($item);
224 $cloned->requirement_spec_id($self->id);
225 $cloned->position(undef);
226 $cloned->fb_number(undef) if $params->{paste_template};
227 $cloned->children(map { $clone_item->($_) } @{ $item->children });
229 $id_to_clone{ $item->id } = $cloned;
234 $paste_template_result{sections} = [ map { $clone_item->($_) } @{ $source->sections_sorted } ];
236 if (!$params->{paste_template}) {
237 $self->items($paste_template_result{sections});
239 $self->add_items($paste_template_result{sections});
242 # Save the items -- need to do that before setting dependencies.
246 foreach my $item (@{ $source->items }) {
247 next unless @{ $item->dependencies };
248 $id_to_clone{ $item->id }->update_attributes(dependencies => [ map { $id_to_clone{$_->id} } @{ $item->dependencies } ]);
251 $self->update_attributes(%attributes) unless $params->{paste_template};
253 return %paste_template_result;
257 my ($self, $source, %attributes) = @_;
259 $self->db->with_transaction(sub { $self->_copy_from({ source => $source, paste_template => 0 }, %attributes); });
263 my ($self, $template) = @_;
265 $self->db->with_transaction(sub { $self->_copy_from({ source => $template, paste_template => 1 }); });
268 sub highest_version {
271 return reduce { $a->version->version_number > $b->version->version_number ? $a : $b } @{ $self->versioned_copies };
274 sub is_working_copy {
277 return !$self->working_copy_id;
280 sub next_version_number {
283 return 1 if !$self->id;
285 my ($max_number) = $self->db->dbh->selectrow_array(<<SQL, {}, $self->id, $self->id);
286 SELECT MAX(v.version_number)
287 FROM requirement_spec_versions v
288 WHERE v.requirement_spec_id IN (
290 FROM requirement_specs rs
292 OR (rs.working_copy_id = ?)
296 return ($max_number // 0) + 1;
300 my ($self, %attributes) = @_;
302 croak "Cannot work on a versioned copy" if $self->working_copy_id;
304 my ($copy, $version);
305 my $ok = $self->db->with_transaction(sub {
306 delete $attributes{version_number};
308 SL::DB::Manager::RequirementSpecVersion->update_all(
309 set => [ working_copy_id => undef ],
310 where => [ requirement_spec_id => $self->id ],
313 $copy = $self->create_copy(working_copy_id => $self->id);
314 $version = SL::DB::RequirementSpecVersion->new(%attributes, version_number => $self->next_version_number, requirement_spec_id => $copy->id, working_copy_id => $self->id)->save;
319 return $ok ? ($copy, $version) : ();
322 sub invalidate_version {
323 my ($self, %params) = @_;
325 croak "Cannot work on a versioned copy" if $self->working_copy_id;
327 return if !$self->id;
329 SL::DB::Manager::RequirementSpecVersion->update_all(
330 set => [ working_copy_id => undef ],
331 where => [ working_copy_id => $self->id ],
336 my ($self, $other) = @_;
338 return $self->id <=> $other->id;
350 SL::DB::RequirementSpec - RDBO model for requirement specs
354 The database structure behind requirement specs is a bit involved. The
355 important thing is how working copy/versions are handled.
357 The table contains three important columns: C<id> (which is also the
358 primary key) and C<working_copy_id>. C<working_copy_id> is a
359 self-referencing column: it can be C<NULL>, but if it isn't then it
360 contains another requirement spec C<id>.
362 Versions are represented similarly. The C<requirement_spec_versions>
363 table has three important columns: C<id> (the primary key),
364 C<requirement_spec_id> (references C<requirement_specs.id> and must
365 not be C<NULL>) and C<working_copy_id> (references
366 C<requirement_specs.id> as well but can be
367 C<NULL>). C<working_copy_id> points to the working copy if and only if
368 the working copy is currently equal to a versioned copy.
370 The design is as follows:
374 =item * The user is always working on a working copy. The working copy
375 is identified in the database by having C<working_copy_id> set to
378 =item * All other entries in this table are referred to as I<versioned
379 copies>. A versioned copy is a copy of a working frozen at the moment
380 in time it was created. Each versioned copy refers back to the working
381 copy it belongs to: each has its C<working_copy_id> set.
383 =item * Each versioned copy must be referenced from an entry in the
384 table C<requirement_spec_versions> via
385 C<requirement_spec_id>.
387 =item * Directly after creating a versioned copy even the working copy
388 itself is referenced from a version via that table's
389 C<working_copy_id> column. However, any modification that will be
390 visible to the customer (text, positioning etc but not internal things
391 like time/cost estimation changes) will cause the version to be
392 disassociated from the working copy. This is achieved via before save
397 =head1 DATABASE TRIGGERS AND CHECKS
399 Several database triggers and consistency checks exist that manage
400 requirement specs, their items and their dependencies. These are
401 described here instead of in the individual files for the other RDBO
406 When you delete a requirement spec all of its dependencies (items,
407 text blocks, versions etc.) are deleted by triggers.
409 When you delete an item (either a section or a (sub-)function block)
410 all of its children will be deleted as well. This will trigger the
411 same trigger resulting in a recursive deletion with the bottom-most
412 items being deleted first. Their item dependencies are deleted as
417 Whenever you update a requirement spec item a trigger will fire that
418 will update the parent's C<time_estimation> column. This also happens
419 when an item is deleted or updated.
421 =head2 CONSISTENCY CHECKS
423 Several consistency checks are applied to requirement spec items:
427 =item * Column C<requirement_spec_item.item_type> can only contain one of
428 the values C<section>, C<function-block> or C<sub-function-block>.
430 =item * Column C<requirement_spec_item.parent_id> must be C<NULL> if
431 C<requirement_spec_item.item_type> is set to C<section> and C<NOT
440 =item C<copy_from $source, %attributes>
442 Copies everything (basic attributes like type/title/customer, items,
443 text blocks, time/cost estimation) save for the versions from the
444 other requirement spec object C<$source> into C<$self> and saves
445 it. This is done within a transaction.
447 C<%attributes> are attributes that are assigned to C<$self> after all
448 the basic attributes from C<$source> have been assigned.
450 This function can be used for resetting a working copy to a specific
453 my $requirement_spec = SL::DB::RequirementSpec->new(id => $::form->{id})->load;
454 my $versioned_copy = SL::DB::RequirementSpec->new(id => $::form->{versioned_copy_id})->load;
456 $requirement_spec->copy_from($versioned_copy);
457 $versioned_copy->version->update_attributes(working_copy_id => $requirement_spec->id);
461 Creates and returns a copy of C<$self>. The copy is already
462 saved. Creating the copy happens within a transaction.
464 =item C<create_version %attributes>
466 Prerequisites: C<$self> must be a working copy (see the overview),
467 not a versioned copy.
469 This function creates a new version for C<$self>. This involves
474 =item 1. The next version number is calculated using
475 L</next_version_number>.
477 =item 2. A copy of C<$self> is created with L</create_copy>.
479 =item 3. An instance of L<SL::DB::RequirementSpecVersion> is
480 created. Its attributes are copied from C<%attributes> save for the
481 version number which is taken from step 1.
483 =item 4. The version instance created in step 3 is referenced to the
484 the copy from step 2 via C<requirement_spec_id> and to the working
485 copy for which the version was created via C<working_copy_id>.
489 All this is done within a transaction.
491 In case of success a two-element list is returned consisting of the
492 copy & version objects created in steps 3 and 2 respectively. In case
493 of a failure an empty list will be returned.
495 =item C<displayable_name>
497 Returns a human-readable name for this instance consisting of the type
500 =item C<highest_version>
502 Given a working copy C<$self> this function returns the versioned copy
503 of C<$self> with the highest version number. If such a version exist
504 its instance is returned. Otherwise C<undef> is returned.
506 This can be used for calculating the difference between the working
507 copy and the last version created for it.
509 =item C<invalidate_version>
511 Prerequisites: C<$self> must be a working copy (see the overview),
512 not a versioned copy.
514 Sets any C<working_copy_id> field in the C<requirement_spec_versions>
515 table containing C<$self-E<gt>id> to C<undef>.
517 =item C<is_working_copy>
519 Returns trueish if C<$self> is a working copy and not a versioned
520 copy. The condition for this is that C<working_copy_id> is C<undef>.
522 =item C<next_version_number>
524 Calculates and returns the next version number for this requirement
525 spec. Version numbers start at 1 and are incremented by one for each
526 version created for it, no matter whether or not it has been reverted
527 to a previous version since. It boils down to this pseudo-code:
529 if (has_never_had_a_version)
532 return max(version_number for all versions for this requirement spec) + 1
536 An alias for L</sections_sorted>.
538 =item C<sections_sorted>
540 Returns an array reference of requirement spec items that do not have
541 a parent -- meaning that are sections.
543 This is not a writer. Use the C<items> relationship for that.
545 =item C<text_blocks_sorted %params>
547 Returns an array reference of text blocks sorted by their positional
548 column in ascending order. If the C<output_position> parameter is
549 given then only the text blocks belonging to that C<output_position>
552 =item C<parts_sorted>
554 Returns an array reference of additional parts sorted by their
555 positional column in ascending order.
559 Validate values before saving. Returns list or human-readable error
562 =item C<versioned_copies_sorted %params>
564 Returns an array reference of versioned copies sorted by their version
565 number in ascending order. If the C<max_version_number> parameter is
566 given then only the versioned copies whose version number is less than
567 or equal to C<max_version_number> are returned.
577 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>