1HTML::FormHandler::FielUds:e:rReCpoenattraibbluet(e3d)PHeTrMlL:D:oFcourmmeHnatnadtlieorn::Field::Repeatable(3)
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NAME

6       HTML::FormHandler::Field::Repeatable - repeatable (array) field
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VERSION

9       version 0.40068
10

SYNOPSIS

12       In a form, for an array of hashrefs, equivalent to a 'has_many'
13       database relationship.
14
15         has_field 'addresses' => ( type => 'Repeatable' );
16         has_field 'addresses.address_id' => ( type => 'PrimaryKey' );
17         has_field 'addresses.street';
18         has_field 'addresses.city';
19         has_field 'addresses.state';
20
21       In a form, for an array of single fields (not directly equivalent to a
22       database relationship) use the 'contains' pseudo field name:
23
24         has_field 'tags' => ( type => 'Repeatable' );
25         has_field 'tags.contains' => ( type => 'Text',
26              apply => [ { check => ['perl', 'programming', 'linux', 'internet'],
27                           message => 'Not a valid tag' } ]
28         );
29
30       or use 'contains' with single fields which are compound fields:
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32         has_field 'addresses' => ( type => 'Repeatable' );
33         has_field 'addresses.contains' => ( type => '+MyAddress' );
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35       If the MyAddress field contains fields 'address_id', 'street', 'city',
36       and 'state', then this syntax is functionally equivalent to the first
37       method where the fields are declared with dots ('addresses.city');
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39       You can pass attributes to the 'contains' field by supplying an
40       'init_contains' hashref.
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42           has_field 'addresses' => ( type => 'Repeatable,
43              init_contains => { wrapper_attr => { class => ['hfh', 'repinst'] } },
44           );
45

DESCRIPTION

47       This class represents an array. It can either be an array of hashrefs
48       (compound fields) or an array of single fields.
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50       The 'contains' keyword is used for elements that do not have names
51       because they are not hash elements.
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53       This field node will build arrays of fields from the parameters or an
54       initial object, or empty fields for an empty form.
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56       The name of the element fields will be an array index, starting with 0.
57       Therefore the first array element can be accessed with:
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59          $form->field('tags')->field('0')
60          $form->field('addresses')->field('0')->field('city')
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62       or using the shortcut form:
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64          $form->field('tags.0')
65          $form->field('addresses.0.city')
66
67       The array of elements will be in "$form->field('addresses')->fields".
68       The subfields of the elements will be in a fields array in each
69       element.
70
71          foreach my $element ( $form->field('addresses')->fields )
72          {
73             foreach my $field ( $element->fields )
74             {
75                # do something
76             }
77          }
78
79       Every field that has a 'fields' array will also have an 'error_fields'
80       array containing references to the fields that contain errors.
81
82   Complications
83       When new elements are created by a Repeatable field in a database form
84       an attempt is made to re-load the Repeatable field from the database,
85       because otherwise the repeatable elements will not have primary keys.
86       Although this works, if you have included other fields in your
87       repeatable elements that do *not* come from the database, the
88       defaults/values must be able to be loaded in a way that works when the
89       form is initialized from the database item. This is only an issue if
90       you re-present the form after the database update succeeds.
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ATTRIBUTES

93       index
94           This attribute contains the next index number available to create
95           an additional array element.
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97       init_contains
98           When the Repeatable is repeated, this hashref will be used to
99           initialise each instance. It can contain any of the same attributes
100           you would normally give to "has_field" in HTML::FormHandler, except
101           "type", for obvious reasons.
102
103               has_field 'addresses' => (
104                   type => 'Repeatable',
105                   init_contains => {
106                       wrapper_attr => {
107                           rel => 'address'
108                       },
109                       wrapper_class => [ 'row' ]
110                   }
111               );
112
113           Note that providing a "wrapper_class" to this hashref will override
114           the default "hfh-repinst" class on these instances.
115
116       num_when_empty
117           This attribute (default 1) indicates how many empty fields to
118           present in an empty form which hasn't been filled from parameters
119           or database rows.
120
121       num_extra
122           When the field results are built from an existing object (item or
123           init_object) an additional number of repeatable elements will be
124           created equal to this number. Default is 0.
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126       add_extra
127           When a form is submitted and the field results are built from the
128           input parameters, it's not clear when or if an additional
129           repeatable element might be wanted. The method 'add_extra' will add
130           an empty repeatable element.
131
132               $form->process( params => {....} );
133               $form->field('my_repeatable')->add_extra(1);
134
135           This might be useful if the form is being re-presented to the user.
136
137       setup_for_js
138               setup_for_js => 1
139
140           Saves information in the form for javascript to use when adding
141           repeatable elements.  If using the example javascript, you also
142           must set 'do_wrapper' in the Repeatable field and use the Bootstrap
143           widget wrapper (or wrap the repeatable elements in a 'controls' div
144           by setting tags => { controls_div => 1 }.  See t/repeatable/js.t
145           for an example. See also HTML::FormHandler::Render::RepeatableJs
146           and HTML::FormHandler::Field::AddElement.
147

AUTHOR

149       FormHandler Contributors - see HTML::FormHandler
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152       This software is copyright (c) 2017 by Gerda Shank.
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154       This is free software; you can redistribute it and/or modify it under
155       the same terms as the Perl 5 programming language system itself.
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159perl v5.34.0                      2022-0H1T-M2L1::FormHandler::Field::Repeatable(3)
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