1 package Maypole::Model::CDBI::AsForm;
6 # has_many select -- $obj->to_field($has_many_col); # select one form many
7 # -- $class->to_field($has_many_col); # foreign inputs
8 # $class->search_inputs; /
16 use Class::DBI::Plugin::Type ();
21 # pjs -- Added new methods to @EXPORT
24 to_cgi to_field foreign_input_delimiter search_inputs unselect_element
25 _field_from_how _field_from_relationship _field_from_column
26 _to_textarea _to_textfield _to_select _select_guts
27 _to_foreign_inputs _to_enum_select _to_bool_select
28 _to_hidden _to_link_hidden _rename_foreign_input _to_readonly
29 _options_from_objects _options_from_arrays _options_from_hashes
30 _options_from_array _options_from_hash
37 Maypole::Model:CDBI::AsForm - Produce HTML form elements for database columns
42 use Maypole::Model::CDBI::AsForm;
43 use base 'Class::DBI';
49 my %cgi_field = $self->to_cgi;
51 (map { "<b>$_</b>: ". $cgi_field{$_}->as_HTML." <br>" }
59 # Somewhere else in a Maypole application about beer...
64 $beer->to_field('brewery', 'textfield', {
65 name => 'brewery_id', value => $beer->brewery,
66 # however, no need to set value since $beer is object
70 $beer->to_field(rating => select => {
71 items => [1 , 2, 3, 4, 5],
74 # Select a Brewery to visit in the UK
75 Brewery->to_field(brewery_id => {
76 items => [ Brewery->search_like(location => 'UK') ],
79 # Make a select for a boolean field
80 $Pub->to_field('open' , { items => [ {'Open' => 1, 'Closed' => 0 } ] });
82 $beer->to_field('brewery', {
83 selected => $beer->brewery, # again not necessary since caller is obj.
87 $beer->to_field('brewery', 'link_hidden', {r => $r, uri => 'www.maypole.perl.org/brewery/view/'.$beer->brewery});
88 # an html link that is also a hidden input to the object. R is required to
89 # make the uri unless you pass a uri
93 #####################################################
102 <span class="field"> [% classmetadata.colnames.$col %] : </span>
104 [% object.to_field(col).as_XML %]
112 <span class="field"> Brewery : </span>
114 [% object.to_field('brewery', { selected => 23} ).as_XML %]
123 #####################################################
128 __PACKAGE__->has_a('job_employer' => 'Employer');
129 __PACKAGE__->has_a('contact' => 'Contact')
132 __PACKAGE__->has_a('cont_employer' => 'Employer');
133 __PACKAGE__->has_many('jobs' => 'Job',
134 { join => { job_employer => 'cont_employer' },
135 constraint => { 'finshed' => 0 },
136 order_by => "created ASC",
141 __PACKAGE__->has_many('jobs' => 'Job',);
142 __PACKAGE__->has_many('contacts' => 'Contact',
143 order_by => 'name DESC',
147 # Choose some jobs to add to a contact (has multiple attribute).
148 my $job_sel = Contact->to_field('jobs'); # Uses constraint and order by
151 # Choose a job from $contact->jobs
152 my $job_sel = $contact->to_field('jobs');
161 This module helps to generate HTML forms for creating new database rows
162 or editing existing rows. It maps column names in a database table to
163 HTML form elements which fit the schema. Large text fields are turned
164 into textareas, and fields with a has-a relationship to other
165 C<Class::DBI> tables are turned into select drop-downs populated with
166 objects from the joined class.
169 =head1 ARGUMENTS HASH
171 This provides a convenient way to tweak AsForm's behavior in exceptional or
172 not so exceptional instances. Below describes the arguments hash and
176 $beer->to_field($col, $how, $args);
177 $beer->to_field($col, $args);
179 Not all _to_* methods pay attention to all arguments. For example, '_to_textfield' does not look in $args->{'items'} at all.
183 =item name -- the name the element will have , this trumps the derived name.
185 $beer->to_field('brewery', 'readonly', {
189 =item value -- the initial value the element will have, trumps derived value
191 $beer->to_field('brewery', 'textfield', {
192 name => 'brewery_id', value => $beer->brewery,
193 # however, no need to set value since $beer is object
196 =item items -- array of items generally used to make select box options
198 Can be array of objects, hashes, arrays, or strings, or just a hash.
201 $beer->to_field(rating => select => {
202 items => [1 , 2, 3, 4, 5],
205 # Select a Brewery to visit in the UK
206 Brewery->to_field(brewery_id => {
207 items => [ Brewery->search_like(location => 'UK') ],
210 # Make a select for a boolean field
211 $Pub->to_field('open' , { items => [ {'Open' => 1, 'Closed' => 0 } ] });
213 =item selected -- something representing which item is selected in a select box
215 $beer->to_field('brewery', {
216 selected => $beer->brewery, # again not necessary since caller is obj.
219 Can be an simple scalar id, an object, or an array of either
221 =item class -- the class for which the input being made for field pertains to.
223 This in almost always derived in cases where it may be difficult to derive, --
224 # Select beers to serve on handpump
225 Pub->to_field(handpumps => select => {
226 class => 'Beer', order_by => 'name ASC', multiple => 1,
229 =item column_type -- a string representing column type
231 $pub->to_field('open', 'bool_select', {
232 column_type => "bool('Closed', 'Open'),
235 =item column_nullable -- flag saying if column is nullable or not
237 Generally this can be set to get or not get a null/empty option added to
238 a select box. AsForm attempts to call "$class->column_nullable" to set this
239 and it defaults to true if there is no shuch method.
241 $beer->to_field('brewery', { column_nullable => 1 });
243 =item r or request -- the Mapyole request object
245 =item uri -- uri for a link , used in methods such as _to_link_hidden
247 $beer->to_field('brewery', 'link_hidden',
248 {r => $r, uri => 'www.maypole.perl.org/brewery/view/'.$beer->brewery});
249 # an html link that is also a hidden input to the object. R is required to
250 # make the uri unless you pass a uri
252 =item order_by, constraint, join
254 These are used in making select boxes. order_by is a simple order by clause
255 and constraint and join are hashes used to limit the rows selected. The
256 difference is that join uses methods of the object and constraint uses
257 static values. You can also specify these in the relationship definitions.
258 See the relationships documentation of how to set arbitrayr meta info.
260 BeerDB::LondonBeer->has_a('brewery', 'BeerDB::Brewery',
261 order_by => 'brewery_name ASC',
262 constraint => {location => 'London'},
263 'join' => {'brewery_tablecolumn => 'beer_obj_column'},
266 =item no_hidden_constraints --
268 Tell AsForm not to make hidden inputs for relationship constraints. It does
269 this sometimes when making foreign inputs. However, i think it should not
270 do this and that the FromCGI 's _create_related method should do it.
276 $self->to_cgi([@columns, $args]);
278 This returns a hash mapping all the column names to HTML::Element objects
279 representing form widgets. It takes two opitonal arguments -- a list of
280 columns and a hashref of hashes of arguments for each column. If called with an object like for editing, the inputs will have the object's values.
282 $self->to_cgi(); # uses $self->columns; # most used
283 $self->to_cgi(qw/brewery style rating/); # sometimes
284 # and on rare occassions this is desireable if you have a lot of fields
285 # and dont want to call to_field a bunch of times just to tweak one or
287 $self->to_cgi(@cols, {brewery => {
288 how => 'textfield' # too big for select
291 column_nullable => 0,
293 items => ['Ale', 'Lager']
300 my ($class, @columns) = @_; # pjs -- added columns arg
303 @columns = $class->columns;
304 # Eventually after stabalization, we could add display_columns
305 #keys map { $_ => 1 } ($class->display_columns, $class->columns);
308 if ( ref $columns[-1] eq 'HASH' ) { $args = pop @columns; }
310 map { $_ => $class->to_field($_, $args->{$_}) } @columns;
313 =head2 to_field($field [, $how][, $args])
315 This maps an individual column to a form element. The C<how> argument
316 can be used to force the field type into any you want. All that you need
317 is a method named "_to_$how" in your class. Your class inherits many from
318 AsForm already. Override them at will.
320 If C<how> is specified but the class cannot call the method it maps to,
321 then AsForm will issue a warning and the default input will be made.
322 You can write your own "_to_$how" methods and AsForm comes with many.
323 See C<HOW Methods>. You can also pass this argument in $args->{how}.
329 my ($self, $field, $how, $args) = @_;
330 if (ref $how) { $args = $how; $how = ''; }
331 unless ($how) { $how = $args->{how} || ''; }
332 #warn "In to_field field is $field how is $how. args ar e" . Dumper($args) . " \n";
333 # Set sensible default value
334 unless ($args->{default}) {
335 my $def = $self->column_default($field);
336 # exclude defaults we don't want actually put as value for input
338 $def = $def =~ /(^0000-00-00.*$|^0[0]*$|^0\.00$|CURRENT_TIMESTAMP|NULL)/i ? '' : $def ;
339 $args->{default} = $def;
345 return $self->_field_from_how($field, $how, $args) ||
346 $self->_field_from_relationship($field, $args) ||
347 $self->_field_from_column($field, $args) ||
348 $self->_to_textfield($field, $args);
354 my $cgi = $class->search_inputs ([$args]); # optional $args
356 Returns hash or hashref of search inputs elements for a class making sure the
357 inputs are empty of any initial values.
358 You can specify what columns you want inputs for in
360 by the method "search_columns". The default is "display_columns".
361 If you want to te search on columns in related classes you can do that by
362 specifying a one element hashref in place of the column name where
363 the key is the related "column" (has_a or has_many method for example) and
364 the value is a list ref of columns to search on in the related class.
367 sub BeerDB::Beer::search_columns {
368 return ( 'name' , 'rating', { brewery => [ 'name', 'location'] } );
371 # Now foreign inputs are made for Brewery name and location and the
372 # there will be no name clashing and processing can be automated.
378 my ($class, $args) = @_;
379 $class = ref $class || $class;
380 #my $accssr_class = { $class->accessor_classes };
383 $args->{columns} ||= $class->can('search_columns') ?[$class->search_columns] : [$class->display_columns];
385 foreach my $field ( @{ $args->{columns} } ) {
387 no_hidden_constraints => 1,
388 column_nullable => 1, # empty option on select boxes
391 if ( ref $field eq "HASH" ) { # foreign search fields
392 my ($accssr, $cols) = each %$field;
393 $base_args->{columns} = $cols;
395 # default to search fields for related
396 #$cols = $accssr_class->{$accssr}->search_columns;
397 die ("$class search_fields error: Must specify at least one column to search in the foreign object named '$accssr'");
399 my $fcgi = $class->to_field($accssr, 'foreign_inputs', $base_args);
401 # unset the default values for a select box
402 foreach (keys %$fcgi) {
403 my $el = $fcgi->{$_};
404 if ($el->tag eq 'select') {
406 $class->unselect_element($el);
407 my ($first, @content) = $el->content_list;
408 my @fc = $first->content_list;
409 my $val = $first ? $first->attr('value') : undef;
410 if ($first and (@fc > 0 or (defined $val and $val ne '')) ) { # something ( $first->attr('value') ne '' or
412 #(defined $first->attr('value') or $first->attr('value') ne ''))
413 # push an empty option on stactk
414 $el->unshift_content(HTML::Element->new('option'));
419 $cgi{$accssr} = $fcgi;
420 delete $base_args->{columns};
423 $cgi{$field} = $class->to_field($field, $base_args); #{no_select => $args->{no_select}{$field} });
424 my $el = $cgi{$field};
425 if ($el->tag eq 'select') {
426 $class->unselect_element($el);
427 my ($first, @content) = $el->content_list;
428 if ($first and $first->content_list) { # something
429 #(defined $first->attr('value') or $first->attr('value') ne ''))
430 # push an empty option on stactk
431 $el->unshift_content(HTML::Element->new('option'));
442 =head2 unselect_element
444 unselect any selected elements in a HTML::Element select list widget
447 sub unselect_element {
448 my ($self, $el) = @_;
449 #unless (ref $el eq 'HTML::Element') {
450 #$self->_croak ('Need an HTML::Element to unselect. You gave a ' . Dumper($el)); }
451 if ($el->tag eq 'select') {
452 foreach my $opt ($el->content_list) {
453 $opt->attr('selected', undef) if $opt->attr('selected');
458 =head2 _field_from_how($field, $how,$args)
460 Returns an input element based the "how" parameter or nothing at all.
465 sub _field_from_how {
466 my ($self, $field, $how, $args) = @_;
470 my $meth = "_to_$how";
471 if (not $self->can($meth)) {
472 warn "Class can not $meth";
475 return $self->$meth($field, $args);
479 =head2 _field_from_relationship($field, $args)
481 Returns an input based on the relationship associated with the field or nothing.
484 For has_a it will give select box
488 sub _field_from_relationship {
489 my ($self, $field, $args) = @_;
490 return unless $field;
491 my $rel_meta = $self->related_meta('r',$field) || return;
492 my $rel_name = $rel_meta->{name};
493 #my $meta = $self->meta_info;
494 #grep{ defined $meta->{$_}{$field} } keys %$meta;
495 my $fclass = $rel_meta->foreign_class;
496 my $fclass_is_cdbi = $fclass ? $fclass->isa('Class::DBI') : 0;
499 if ($rel_meta->{name} eq 'has_a' and $fclass_is_cdbi) {
500 # This condictions allows for trumping of the has_a args
501 if (not $rel_meta->{args}{no_select} and not $args->{no_select})
503 $args->{class} = $fclass;
504 return $self->_to_select($field, $args);
508 # maybe has many select
509 if ($rel_meta->{name} eq 'has_many' and $fclass_is_cdbi and ref $self) {
510 # This condictions allows for trumping of the has_a args
511 if (not $rel_meta->{args}{no_select} and not $args->{no_select})
513 $args->{class} = $fclass;
514 my @itms = $self->$field; # need list not iterator
515 $args->{items} = \@itms;
516 return $self->_to_select($field, $args);
523 #NOOO! maybe select from has_many
524 # if ($rel_type eq 'has_many' and ref $self) {
525 # $args->{items} ||= [$self->$field];
526 # # arg name || fclass pk name || field
527 # if (not $args->{name}) {
528 # $args->{name} = eval{$fclass->primary_column->name} || $field;
530 # return $self->_to_select($field, $args);
533 # maybe foreign inputs
534 my %local_cols = map { $_ => 1 } $self->columns; # includes is_a cols
535 if ($fclass_is_cdbi and (not $local_cols{$field} or $rel_name eq 'has_own'))
537 $args->{related_meta} = $rel_meta; # suspect faster to set these args
538 return $self->_to_foreign_inputs($field, $args);
543 =head2 _field_from_column($field, $args)
545 Returns an input based on the column's characteristics, namely type, or nothing.
550 sub _field_from_column {
551 my ($self, $field, $args) = @_;
552 return unless $field;
553 my $class = ref $self || $self;
555 unless ($args->{column_type}) {
556 if ($class->can('column_type')) {
557 $args->{column_type} = $class->column_type($field);
560 # Right, have some of this
561 eval "package $class; Class::DBI::Plugin::Type->import()";
562 $args->{column_type} = $class->column_type($field);
565 my $type = $args->{column_type};
567 return $self->_to_textfield($field, $args)
568 if $type and $type =~ /^(VAR)?CHAR/i; #common type
569 return $self->_to_textarea($field, $args)
570 if $type and $type =~ /^(TEXT|BLOB)$/i;
571 return $self->_to_enum_select($field, $args)
572 if $type and $type =~ /^ENUM\((.*?)\)$/i;
573 return $self->_to_bool_select($field, $args)
574 if $type and $type =~ /^BOOL/i;
575 return $self->_to_readonly($field, $args)
576 if $type and $type =~ /^readonly$/i;
582 my ($self, $col, $args) = @_;
585 my $val = $args->{value};
587 unless (defined $val) {
592 $val = $args->{default};
593 $val = '' unless defined $val;
596 my ($rows, $cols) = _box($val);
597 $rows = $args->{rows} if $args->{rows};
598 $cols = $args->{cols} if $args->{cols};;
599 my $name = $args->{name} || $col;
601 HTML::Element->new("textarea", name => $name, rows => $rows, cols => $cols);
602 $a->push_content($val);
603 $OLD_STYLE && return $a->as_HTML;
608 my ($self, $col, $args ) = @_;
609 use Carp qw/confess/;
610 confess "No col passed to _to_textfield" unless $col;
612 my $val = $args->{value};
613 my $name = $args->{name} || $col;
615 unless (defined $val) {
617 # Case where column inflates.
618 # Input would get stringification which could be not good.
619 # as in the case of Time::Piece objects
620 $val = $self->can($col) ? $self->$col : ''; # in case it is a virtual column
622 if (my $meta = $self->related_meta('',$col)) {
623 if (my $code = $meta->{args}{deflate4edit} || $meta->{args}{deflate} ) {
624 $val = ref $code ? &$code($val) : $val->$code;
626 elsif ( $val->isa('Class::DBI') ) {
630 #warn "No deflate4edit code defined for $val of type " .
631 #ref $val . ". Using the stringified value in textfield..";
635 $val = $val->id if $val->isa("Class::DBI");
641 $val = $args->{default};
642 $val = '' unless defined $val;
646 # THIS If section is neccessary or you end up with "value" for a vaiue
648 $val = '' unless defined $val;
649 $a = HTML::Element->new("input", type => "text", name => $name, value =>$val);
650 $OLD_STYLE && return $a->as_HTML;
657 # my ($self, $col, $hint) = @_;
658 # my $fclass = $hint || $self->__hasa_rels->{$col}->[0];
659 # my @objs = $fclass->retrieve_all;
660 # my $a = HTML::Element->new("select", name => $col);
662 # my $sel = HTML::Element->new("option", value => $_->id);
663 # $sel->attr("selected" => "selected")
665 # and eval { $_->id eq $self->$col->id };
666 # $sel->push_content($_->stringify_self);
667 # $a->push_content($sel);
669 # $OLD_STYLE && return $a->as_HTML;
676 =head2 recognized arguments
678 selected => $object|$id,
681 where => SQL 'WHERE' clause,
682 order_by => SQL 'ORDER BY' clause,
683 constraint => hash of constraints to search
684 limit => SQL 'LIMIT' clause,
685 items => [ @items_of_same_type_to_select_from ],
686 class => $class_we_are_selecting_from
687 stringify => $stringify_coderef|$method_name
692 # select box requirements
693 # 1. a select box for objecs of a has_a related class -- DONE
694 =head2 1. a select box out of a has_a or has_many related class.
695 # For has_a the default behavior is to make a select box of every element in
696 # related class and you choose one.
697 #Or explicitly you can create one and pass options like where and order
698 BeerDB::Beer->to_field('brewery','select', {where => "location = 'Germany'");
700 # For has_many the default is to get a multiple select box with all objects.
701 # If called as an object method, the objects existing ones will be selected.
702 Brewery::BeerDB->to_field('beers','select', {where => "rating > 5"});
705 =head2 2. a select box for objects of arbitrary class -- say BeerDB::Beer for fun.
707 BeerDB::Beer->to_field('', 'select', $options)
709 BeerDB::Beer->to_field('', 'select'); # Select box of all the rows in class
710 # with PK as ID, $Class->to_field() same.
711 BeerDB::Beer->to_field('','select',{ where => "rating > 3 AND class like 'Ale'", order_by => 'rating DESC, beer_id ASC' , limit => 10});
712 # specify exact where clause
714 =head2 3. If you already have a list of objects to select from --
716 BeerDB:;Beer->to_field($col, 'select' , {items => $objects});
718 # 3. a select box for arbitrary set of objects
719 # Pass array ref of objects as first arg rather than field
720 $any_class_or_obj->to_field([BeerDB::Beer->search(favorite => 1)], 'select',);
726 my ($self, $col, $args) = @_;
728 # Do we have items already ? Go no further.
729 if ($args->{items} and ref $args->{items}) {
730 my $a = $self->_select_guts($col, $args);
731 $OLD_STYLE && return $a->as_HTML;
732 if ($args->{multiple}) { $a->attr('multiple', 'multiple');}
740 unless ($args->{class}) {
741 $args->{class} = ref $self || $self;
742 # object selected if called with one
743 $args->{selected} = { $self->id => 1}
744 if not $args->{selected} and ref $self;
746 $col = $args->{class}->primary_column;
748 # Related Class maybe ?
749 elsif ($rel_meta = $self->related_meta('r:)', $col) ) {
750 $args->{class} = $rel_meta->{foreign_class};
751 # related objects pre selected if object
753 # "Has many" -- Issues:
754 # 1) want to select one or many from list if self is an object
755 # Thats about all we can do really,
756 # 2) except for mapping which is TODO and would
757 # do something like add to and take away from list of permissions for
760 # Hasmany select one from list if ref self
761 if ($rel_meta->{name} =~ /has_many/i and ref $self) {
762 my @itms = $self->$col; # need list not iterator
763 $args->{items} = \@itms;
764 my $a = $self->_select_guts($col, $args);
765 $OLD_STYLE && return $a->as_HTML;
769 $args->{selected} ||= [ $self->$col ] if ref $self;
770 #warn "selected is " . Dumper($args->{selected});
771 my $c = $rel_meta->{args}{constraint} || {};
772 my $j = $rel_meta->{args}{join} || {};
775 @join = map { $_ ." = ". $self->_attr($_) } keys %$j;
777 my @constr= map { "$_ = '$c->{$_}'"} keys %$c;
778 $args->{where} ||= join (' AND ', (@join, @constr));
779 $args->{order_by} ||= $rel_meta->{args}{order_by};
780 $args->{limit} ||= $rel_meta->{args}{limit};
784 # We could say :Col is name and we are selecting out of class arg.
787 #$args->{name} = $col;
788 die "Usage _to_select. $col not related to any class to select from. ";
793 unless ( defined $args->{column_nullable} ) {
794 $args->{column_nullable} = $self->can('column_nullable') ?
795 $self->column_nullable($col) : 1;
798 # Get items to select from
799 my $items = _select_items($args); # array of hashrefs
801 # Turn items into objects if related
802 if ($rel_meta and not $args->{no_construct}) {
804 push @objs, $rel_meta->{foreign_class}->construct($_) foreach @$items;
805 $args->{items} = \@objs;
807 else { $args->{items} = $items; }
810 #warn "Just got items. They are " . Dumper($args->{items});
812 # Make select HTML element
813 $a = $self->_select_guts($col, $args);
815 if ($args->{multiple}) {$a->attr('multiple', 'multiple');}
818 $OLD_STYLE && return $a->as_HTML;
827 # returns the intersection of list refs a and b
828 sub _list_intersect {
830 my %isect; my %union;
831 foreach my $e (@$a, @$b) { $union{$e}++ && $isect{$e}++ }
837 # Get Items returns array of hashrefs
840 my $fclass = $args->{class};
841 my @disp_cols = @{$args->{columns} || []};
842 @disp_cols = $fclass->columns('SelectBox') unless @disp_cols;
843 @disp_cols = $fclass->columns('Stringify')unless @disp_cols;
844 @disp_cols = $fclass->_essential unless @disp_cols;
845 unshift @disp_cols, $fclass->columns('Primary');
846 #my %isect = _list_intersect(\@pks, \@disp_cols);
847 #foreach (@pks) { push @sel_cols, $_ unless $isect{$_}; }
848 #push @sel_cols, @disp_cols;
850 #warn "in select items. args are : " . Dumper($args);
852 if ($args->{'distinct'}) {
853 $distinct = 'DISTINCT ';
856 my $sql = "SELECT $distinct" . join( ', ', @disp_cols) .
857 " FROM " . $fclass->table;
859 $sql .= " WHERE " . $args->{where} if $args->{where};
860 $sql .= " ORDER BY " . $args->{order_by} if $args->{order_by};
861 $sql .= " LIMIT " . $args->{limit} if $args->{limit};
862 #warn "_select_items sql is : $sql";
864 my $sth = $fclass->db_Main->prepare($sql);
867 while ( my $d = $sth->fetchrow_hashref ) {push @data, $d};
873 # Makes a readonly input box out of column's value
874 # No args makes object to readonly
876 my ($self, $col, $args) = @_;
877 my $val = $args->{value};
878 if (not defined $val ) { # object to readonly
879 $self->_croak("AsForm: To readonly field called as class method without a value") unless ref $self;
881 $col = $self->primary_column;
883 my $a = HTML::Element->new('input', 'type' => 'text', readonly => '1',
884 'name' => $col, 'value'=>$val);
885 $OLD_STYLE && return $a->as_HTML;
890 =head2 _to_enum_select
892 Returns a select box for the an enum column type.
896 sub _to_enum_select {
897 my ($self, $col, $args) = @_;
898 my $type = $args->{column_type};
899 $type =~ /ENUM\((.*?)\)/i;
900 (my $enum = $1) =~ s/'//g;
901 my @enum_vals = split /\s*,\s*/, $enum;
903 # determine which is pre selected --
904 my $selected = eval { $self->$col };
905 $selected = $args->{default} unless defined $selected;
906 $selected = $enum_vals[0] unless defined $selected;
908 my $a = HTML::Element->new("select", name => $col);
910 my $sel = HTML::Element->new("option", value => $_);
911 $sel->attr("selected" => "selected") if $_ eq $selected ;
912 $sel->push_content($_);
913 $a->push_content($sel);
915 $OLD_STYLE && return $a->as_HTML;
920 =head2 _to_bool_select
922 Returns a "No/Yes" select box for a boolean column type.
925 # TCODO fix this mess with args
926 sub _to_bool_select {
927 my ($self, $col, $args) = @_;
928 my $type = $args->{column_type};
929 my @bool_text = ('No', 'Yes');
930 if ($type =~ /BOOL\((.+?)\)/i) {
931 (my $bool = $1) =~ s/'//g;
932 @bool_text = split /,/, $bool;
937 my $selected = $args->{value} if defined $args->{value};
938 $selected = $args->{selected} unless defined $selected;
939 $selected = ref $self ? eval {$self->$col;} : $args->{default}
940 unless (defined $selected);
942 my $a = HTML::Element->new("select", name => $col);
943 if ($args->{column_nullable} || $args->{value} eq '') {
944 my $null = HTML::Element->new("option");
945 $null->attr('selected', 'selected') if $args->{value} eq '';
946 $a->push_content( $null );
949 my ($opt0, $opt1) = ( HTML::Element->new("option", value => 0),
950 HTML::Element->new("option", value => 1) );
951 $opt0->push_content($bool_text[0]);
952 $opt1->push_content($bool_text[1]);
953 unless ($selected eq '') {
954 $opt0->attr("selected" => "selected") if not $selected;
955 $opt1->attr("selected" => "selected") if $selected;
957 $a->push_content($opt0, $opt1);
958 $OLD_STYLE && return $a->as_HTML;
963 =head2 _to_hidden($field, $args)
965 This makes a hidden html element input. It uses the "name" and "value"
966 arguments. If one or both are not there, it will look for an object in
967 "items->[0]" or the caller. Then it will use $field or the primary key for
968 name and the value of the column by the derived name.
973 my ($self, $field, $args) = @_;
975 my ($name, $value) = ($args->{'name'}, $args->{value});
976 $name = $field unless defined $name;
977 if (! defined $name and !defined $value) { # check for objects
978 my $obj = $args->{items}->[0] || $self;
979 unless (ref $obj) { die "_to_hidden cannot determine a value. It was passed a value argument or items object or called with an object."; }
980 $name = $obj->primary_column->name unless $name;
981 $value = $obj->$name unless $value;
984 return HTML::Element->new('input', 'type' => 'hidden',
985 'name' => $name, 'value'=>$value);
989 =head2 _to_link_hidden($col, $args)
991 Makes a link with a hidden input with the id of $obj as the value and name.
992 Name defaults to the objects primary key. The object defaults to self.
996 sub _to_link_hidden {
997 my ($self, $accessor, $args) = @_;
998 my $r = eval {$self->controller} || $args->{r} || '';
999 my $uri = $args->{uri} || '';
1001 $self->_croak("_to_link_hidden cant get uri. No Maypole Request class (\$r) or uri arg. Need one or other.")
1004 if (ref $self) { # hidding linking self
1006 $name = $args->{name} || $obj->primary_column->name;
1008 elsif ($obj = $args->{items}->[0]) {
1009 $name = $args->{name} || $accessor || $obj->primary_column->name;
1010 # TODO use meta data above maybe
1012 else { # hiding linking related object with id in args
1013 $obj = $self->related_class($r, $accessor)->retrieve($args->{id});
1014 $name = $args->{name} || $accessor ; #$obj->primary_column->name;
1015 # TODO use meta data above maybe
1017 $self->_croak("_to_link_hidden has no object") unless ref $obj;
1018 my $href = $uri || $r->config->{uri_base} . "/". $obj->table."/view/".$obj->id;
1019 my $a = HTML::Element->new('a', 'href' => $href);
1020 $a->push_content("$obj");
1021 $a->push_content($self->to_field('blahfooey', 'hidden', {name => $name, value => $obj->id} ));
1023 $OLD_STYLE && return $a->as_HTML;
1027 =head2 _to_foreign_inputs
1029 Creates inputs for a foreign class, usually related to the calling class or
1030 object. In names them so they do not clash with other names and so they
1031 can be processed generically. See _rename_foreign_inputs below and
1032 Maypole::Model::CDBI::FromCGI::classify_foreign_inputs.
1034 Arguments this recognizes are :
1036 related_meta -- if you have this, great, othervise it will determine or die
1037 columns -- list of columns to make inputs for
1038 request (r) -- TODO the Maypole request so we can see what action
1042 sub _to_foreign_inputs {
1043 my ($self, $accssr, $args) = @_;
1044 my $rel_meta = $args->{related_meta} || $self->related_meta('r',$accssr);
1045 my $fields = $args->{columns};
1047 $self->_croak( "No relationship for accessor $accssr");
1050 my $rel_type = $rel_meta->{name};
1051 my $classORobj = ref $self && ref $self->$accssr ? $self->$accssr : $rel_meta->{foreign_class};
1054 $fields = $classORobj->can('display_columns') ?
1055 [$classORobj->display_columns] : [$classORobj->columns];
1058 # Ignore our fkey in them to prevent infinite recursion
1059 my $me = eval {$rel_meta->{args}{foreign_key}} ||
1060 eval {$rel_meta->{args}{foreign_column}}
1061 || ''; # what uses foreign_column has_many or might_have
1062 my $constrained = $rel_meta->{args}{constraint};
1064 foreach ( @$fields ) {
1065 next if $constrained->{$_} || ($_ eq $me); # don't display constrained
1066 $inputs{$_} = $classORobj->to_field($_);
1069 # Make hidden inputs for constrained columns unless we are editing object
1070 # TODO -- is this right thing to do?
1071 unless (ref $classORobj || $args->{no_hidden_constraints}) {
1072 $inputs{$_} = $classORobj->to_field('blahfooey', 'hidden',
1073 {name => $_, value => $constrained->{$_}} )
1074 foreach ( keys %$constrained );
1076 $self->_rename_foreign_input($accssr, \%inputs);
1081 =head2 _hash_selected
1083 *Function* to make sense out of the "selected" argument which has values of the
1084 options that should be selected by default when making a select box. It
1085 can be in a number formats. This method returns a map of which options to
1086 select with the values being the keys in the map ( {val1 => 1, val2 = 1} ).
1088 Currently this method handles the following formats for the "selected" argument
1089 and in the following ways
1091 Object -- uses the id method to get the value
1092 Scalar -- assumes it *is* the value
1093 Array ref of objects -- same as Object
1094 Arrays of data -- uses the 0th element in each
1095 Hashes of data -- uses key named 'id'
1102 sub _hash_selected {
1104 my $selected = $args->{value} || $args->{selected};
1105 #warn "**** SELECTED is $selected ****";
1106 my $type = ref $selected;
1107 return $selected unless $selected and $type ne 'HASH';
1108 #warn "Selected dump : " . Dumper($selected);
1110 if ($type and $type ne 'ARRAY') {
1111 my $id = $selected->id;
1117 return { $selected => 1};
1121 # Array of objs, arrays, hashes, or just scalalrs.
1122 elsif ($type eq 'ARRAY') {
1124 my $ltype = ref $selected->[0];
1126 if ($ltype and $ltype ne 'ARRAY') {
1127 %hashed = map { $_->id => 1 } @$selected;
1129 # Arrays of data with id first
1130 elsif ($ltype and $ltype eq 'ARRAY') {
1131 %hashed = map { $_->[0] => 1 } @$selected;
1133 # Hashes using pk or id key
1134 elsif ($ltype and $ltype eq 'HASH') {
1135 my $pk = $args->{class}->primary_column || 'id';
1136 %hashed = map { $_->{$pk} => 1 } @$selected;
1140 %hashed = map { $_ => 1 } @$selected;
1144 else { warn "AsForm Could not hash the selected argument: $selected"; }
1152 Internal api method to make the actual select box form elements.
1155 Items to make options out of can be
1157 Array of CDBI objects.
1159 Array or Array refs with cols from class,
1167 my ($self, $col, $args) = @_; #$nullable, $selected_id, $values) = @_;
1169 #$args->{stringify} ||= 'stringify_selectbox';
1171 $args->{selected} = _hash_selected($args) if defined $args->{selected};
1172 my $name = $args->{name} || $col;
1173 my $a = HTML::Element->new('select', name => $name);
1174 $a->attr( %{$args->{attr}} ) if $args->{attr};
1176 if ($args->{column_nullable}) {
1177 my $null_element = HTML::Element->new('option', value => '');
1178 $null_element->attr(selected => 'selected')
1179 if ($args->{selected}{'null'});
1180 $a->push_content($null_element);
1183 my $items = $args->{items};
1184 my $type = ref $items;
1185 my $proto = eval { ref $items->[0]; } || "";
1186 my $optgroups = $args->{optgroups} || '';
1188 # Array of hashes, one for each optgroup
1191 foreach (@$optgroups) {
1192 my $ogrp= HTML::Element->new('optgroup', label => $_);
1193 $ogrp->push_content($self->_options_from_hash($items->[$i], $args));
1194 $a->push_content($ogrp);
1199 elsif ($type eq 'HASH') {
1200 $a->push_content($self->_options_from_hash($items, $args));
1203 elsif ( $type eq 'ARRAY' and not ref $items->[0] ) {
1204 $a->push_content($self->_options_from_array($items, $args));
1207 elsif( $type eq 'ARRAY' and $proto !~ /ARRAY|HASH/i ) {
1208 # make select of objects
1209 $a->push_content($self->_options_from_objects($items, $args));
1212 elsif ( $type eq 'ARRAY' and $proto eq 'ARRAY' ) {
1213 $a->push_content($self->_options_from_arrays($items, $args));
1216 elsif ( $type eq 'ARRAY' and $proto eq 'HASH' ) {
1217 $a->push_content($self->_options_from_hashes($items, $args));
1220 die "You passed a weird type of data structure to me. Here it is: " .
1229 =head2 _options_from_objects ( $objects, $args);
1231 Private method to makes a options out of objects. It attempts to call each
1232 objects stringify method specified in $args->{stringify} as the content. Otherwise the default stringification prevails.
1234 *Note only single primary keys supported
1237 sub _options_from_objects {
1238 my ($self, $items, $args) = @_;
1239 my $selected = $args->{selected} || {};
1240 my $stringify = $args->{stringify} || '';
1244 my $opt = HTML::Element->new("option", value => $id);
1245 $id =~ s/^0*//; # leading zeros no good in hash key
1246 $opt->attr(selected => "selected") if $selected->{$id};
1247 my $content = $stringify ? $_->stringify : "$_";
1248 $opt->push_content($content);
1254 sub _options_from_arrays {
1255 my ($self, $items, $args) = @_;
1256 my $selected = $args->{selected} || {};
1258 my $class = $args->{class} || '';
1259 my $stringify = $args->{stringify} || '';
1260 for my $item (@$items) {
1261 my @pks; # for future multiple key support
1262 push @pks, shift @$item foreach $class->columns('Primary');
1264 $id =~ s/^0+//; # In case zerofill is on .
1265 my $val = defined $id ? $id : '';
1266 my $opt = HTML::Element->new("option", value =>$val);
1267 $opt->attr(selected => "selected") if $selected->{$id};
1269 my $content = ($class and $stringify and $class->can($stringify)) ?
1270 $class->$stringify($_) :
1271 join( '/', map { $_ if $_; }@{$item} );
1272 $opt->push_content( $content );
1279 sub _options_from_array {
1280 my ($self, $items, $args) = @_;
1281 my $selected = $args->{selected} || {};
1284 my $val = defined $_ ? $_ : '';
1285 my $opt = HTML::Element->new("option", value => $val);
1286 #$opt->attr(selected => "selected") if $selected =~/^$id$/;
1287 $opt->attr(selected => "selected") if $selected->{$_};
1288 $opt->push_content( $_ );
1294 sub _options_from_hash {
1295 my ($self, $items, $args) = @_;
1296 my $selected = $args->{selected} || {};
1299 my @values = values %$items;
1300 # hash Key is the option content and the hash value is option value
1301 for (sort keys %$items) {
1302 my $val = defined $items->{$_} ? $items->{$_} : '';
1303 my $opt = HTML::Element->new("option", value => $val);
1304 #$opt->attr(selected => "selected") if $selected =~/^$id$/;
1305 $opt->attr(selected => "selected") if $selected->{$items->{$_}};
1306 $opt->push_content( $_ );
1313 sub _options_from_hashes {
1314 my ($self, $items, $args) = @_;
1315 my $selected = $args->{selected} || {};
1316 my $pk = eval {$args->{class}->primary_column} || 'id';
1317 my $fclass = $args->{class} || '';
1318 my $stringify = $args->{stringify} || '';
1321 my $val = defined $_->{$pk} ? $_->{$pk} : '';
1322 my $opt = HTML::Element->new("option", value => $val);
1323 $opt->attr(selected => "selected") if $selected->{$val};
1324 my $content = ($fclass and $stringify and $fclass->can($stringify)) ?
1325 $fclass->$stringify($_) :
1326 join(' ', keys %$_);
1327 $opt->push_content( $content );
1334 #sub _to_select_or_create {
1335 # my ($self, $col, $args) = @_;
1336 # $args->{name} ||= $col;
1337 # my $select = $self->to_field($col, 'select', $args);
1338 # $args->{name} = "create_" . $args->{name};
1339 # my $create = $self->to_field($col, 'foreign_inputs', $args);
1340 # $create->{'__select_or_create__'} =
1341 # $self->to_field('__select_or_create__',{ name => '__select_or_create__' , value => 1 } );
1342 # return ($select, $create);
1348 Makes a checkbox element -- TODO
1352 # checkboxes: if no data in hand (ie called as class method), replace
1353 # with a radio button, in order to allow this field to be left
1354 # unspecified in search / add forms.
1357 # TODO -- make this general checkboxse
1361 my ($self, $col, $args) = @_;
1362 my $nullable = eval {self->column_nullable($col)} || 0;
1363 return $self->_to_radio($col) if !ref($self) || $nullable;
1364 my $value = $self->$col;
1365 my $a = HTML::Element->new("input", type=> "checkbox", name => $col);
1366 $a->attr("checked" => 'true') if $value eq 'Y';
1372 Makes a radio button element -- TODO
1375 # TODO -- make this general radio butons
1378 my ($self, $col) = @_;
1379 my $value = ref $self && $self->$col || '';
1380 my $nullable = eval {self->column_nullable($col)} || 0;
1381 my $a = HTML::Element->new("span");
1382 my $ry = HTML::Element->new("input", type=> "radio", name=>$col, value=>'Y' );
1383 my $rn = HTML::Element->new("input", type=> "radio", name=>$col, value=>'N' );
1384 my $ru = HTML::Element->new("input", type=> "radio", name=>$col, value=>'' ) if $nullable;
1385 $ry->push_content('Yes'); $rn->push_content('No');
1386 $ru->push_content('n/a') if $nullable;
1387 if ($value eq 'Y') { $ry->attr("checked" => 'true') }
1388 elsif ($value eq 'N') { $rn->attr("checked" => 'true') }
1389 elsif ($nullable) { $ru->attr("checked" => 'true') }
1390 $a->push_content($ry, $rn);
1391 $a->push_content($ru) if $nullable;
1397 ############################ HELPER METHODS ######################
1398 ##################################################################
1400 =head2 _rename_foreign_input
1402 _rename_foreign_input($html_el_or_hash_of_them); # changes made by reference
1404 Recursively renames the foreign inputs made by _to_foreign_inputs so they
1405 can be processed generically. It uses foreign_input_delimiter.
1407 So if an Employee is a Person who has_many Addresses and you call and the
1408 method 'foreign_input_delimiter' returns '__AF__' then
1410 Employee->to_field("person");
1412 will get inputs for the Person as well as their Address (by default,
1413 override _field_from_relationship to change logic) named like this:
1415 person__AF__address__AF__street
1416 person__AF__address__AF__city
1417 person__AF__address__AF__state
1418 person__AF__address__AF__zip
1420 And the processor would know to create this address, put the address id in
1421 person->{address} data slot, insert the person and put the person id in the employee->{person} data slot and then insert the employee with that data.
1425 sub _rename_foreign_input {
1426 my ($self, $accssr, $element) = @_;
1427 my $del = $self->foreign_input_delimiter;
1429 if ( ref $element ne 'HASH' ) {
1430 # my $new_name = $accssr . "__AF__" . $input->attr('name');
1431 $element->attr( name => $accssr . $del . $element->attr('name'));
1434 $self->_rename_foreign_input($accssr, $element->{$_})
1435 foreach (keys %$element);
1439 =head2 foreign_input_delimiter
1441 This tells AsForm what to use to delmit forieign input names. This is important
1442 to avoid name clashes as well as automating processing of forms.
1446 sub foreign_input_delimiter { '__AF__' };
1450 This functions computes the dimensions of a textarea based on the value
1458 my ($min_rows, $max_rows, $min_cols, $max_cols) = (2 => 50, 20 => 100);
1461 my @rows = split /^/, $text;
1462 my $cols = $min_cols;
1465 my $len = length $_;
1467 $cols = $len if $len > $cols;
1468 $cols = $max_cols if $cols > $max_cols;
1471 $rows = int($chars/$cols) + 1 if $chars/$cols > $rows;
1472 $rows = $min_rows if $rows < $min_rows;
1473 $rows = $max_rows if $rows > $max_rows;
1476 else { ($min_rows, $min_cols) }
1486 15-07-2004 -- Initial version
1493 Peter Speltz, Aaron Trevena
1495 =head1 AUTHORS EMERITUS
1497 Simon Cozens, Tony Bowden
1503 chekbox generalization
1504 radio generalization
1506 Make link_hidden use standard make_url stuff when it gets in Maypole
1507 How do you tell AF --" I want a has_many select box for this every time so,
1508 when you call "to_field($this_hasmany)" you get a select box
1510 =head1 BUGS and QUERIES
1512 Please direct all correspondence regarding this module to:
1515 =head1 COPYRIGHT AND LICENSE
1517 Copyright 2003-2004 by Simon Cozens / Tony Bowden
1519 This library is free software; you can redistribute it and/or modify
1520 it under the same terms as Perl itself.
1524 L<Class::DBI>, L<Class::DBI::FromCGI>, L<HTML::Element>.