deriv-com / perl-HTML-FormBuilder

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NAME

HTML::FormBuilder - A Multi-part HTML form

SYNOPSIS

#define a form
my $form = HTML::FormBuilder->new(
    data =>{id    => 'formid',
            class => 'formclass'},
    classes => {row => 'rowdev'})

#create fieldset
my $fieldset = $form->add_fieldset({id => 'fieldset1});

#add field
$fieldset->add_field({input => {name => 'name', type => 'text', value => 'Join'}});

#set field value
$form->set_field_value('name', 'Omid');

#output the form
print $form->build;

DESCRIPTION

Object-oriented module for displaying an HTML form.

Overview of Form's HTML structure

The root of the structure is the <form> element and follow by multiple <fieldset> elements.

In each <fieldset>, you can create rows which contain label, different input types, error message and comment <p> element.

Please refer to "A full sample result"

Attributes

data

The form attributes. It should be a hashref.

classes

The form classes. It should be a hashref. You can customize the form's layout by the classes. The class names used are:

  fieldset_group
  no_stack_field_parent
  row_padding
  fieldset_footer
  comment
  row
  extra_tooltip_container
  backbutton
  required_asterisk
  inputtrailing
  label_column
  input_column
  hide_mobile

localize

The subroutine ref which can be called when translate something like 'Confirm'. The default value is no translating.

fieldsets

The fieldsets the form have.

Methods

new

my $form = HTML::FormBuilder->new(
    data =>{id    => 'formid',
            class => 'formclass'},
    classes => {row => 'rowdev'})

The id is required for the form.

add_fieldset

my $fieldset = $form->add_fieldset({id => 'fieldset1});

the parameter is the fieldset attributes. It will return the fielset object.

add_field

  $form->add_field(0, {input => {name => 'name', type => 'text', value => 'Join'}});

The parameter is the fieldset index to which you want to add the field and the field attributes.

build

  print $form->build;

the data in the $form will be changed when build the form. So you cannot get the same result if you call build twice.

BUILDARGS

build_confirmation_button_with_all_inputs_hidden

csrftoken

get_field_error_message

get_field_value

set_field_error_message

set_field_value

Cookbook

a full sample

# Before create a form, create a classes hash for the form
my $classes = {comment => 'comment', 'input_column' => 'column'};
# And maybe you need a localize function to translate something
my $localize = sub {i18n(shift)};

# First, create the Form object. The keys in the HASH reference is the attributes of the form
$form_attributes => {'id'     => 'id_of_the_form',
                     'name'   => 'name_of_the_form',
                     'method' => 'post', # or get
                     'action' => 'page_to_submit',
                     'header' => 'My Form',
                     'localize' => $localize,
                     'classes'  => $classes,
                     };   #header of the form
my $form = HTML::FormBuilder->new(data => $form_attributes, classes => $classes, localize => $localize);

#Then create fieldset, the form is allow to have more than 1 fieldset
#The keys in the HASH reference is the attributes of the fieldset

$fieldset_attributes => {'id'      => 'id_of_the_fieldset',
                         'name'    => 'name_of_the_fieldset',
                         'class'   => 'myclass',
                         'header'  => 'User details',      #header of the fieldset
                         'comment' => 'please fill in',    #message at the top of the fieldset
                         'footer'  => '* - required',};    #message at the bottom of the fieldset
};
my $fieldset = $form->add_fieldset($fieldset_attributes);

####################################
#Create the input fields.
####################################
#When creating an input fields, there are 4 supported keys.
#The keys are label, input, error, comment
#  Label define the title of the input field
#  Input define and create the actual input type
#     In input fields, you can defined a key 'heading', which create a text before the input is displayed,
#     however, if the input type is radio the text is behind the radio box
#  Error message that go together with the input field when fail in validation
#  Comment is the message added to explain the input field.

####################################
###Creating a input text
####################################

my $input_text = {'label'   => {'text' => 'Register Name', for => 'name'},
                  'input'   => {'type' => 'text', 'value' => 'John', 'id' => 'name', 'name' => 'name', 'maxlength' => '22'},
                  'error'   => { 'id' => 'error_name' ,'text' => 'Name must be in alphanumeric', 'class' => 'errorfield hidden'},
                  'comment' => {'text' => 'Please tell us your name'}};

####################################
###Creating a select option
####################################
    my @options;
    push @options, {'value' => 'Mr', 'text' => 'Mr'};
    push @options, {'value' => 'Mrs', 'text' => 'Mrs'};

    my $input_select = {'label' => {'text' => 'Title', for => 'mrms'},
                        'input' => {'type' => 'select', 'id' => 'mrms', 'name' => 'mrms', 'options' => \@options},
                        'error' => {'text' => 'Please select a title', 'class' => 'errorfield hidden'}};

####################################
###Creating a hidden value
####################################
my $input_hidden = {'input' => {'type' => 'hidden', 'value' => 'John', 'id' => 'name', 'name' => 'name'}};

####################################
###Creating a submit button
####################################
my $input_submit_button = {'input' => {'type' => 'submit', 'value' => 'Submit Form', 'id' => 'submit', 'name' => 'submit'}};

###NOTES###
Basically, you just need to change the type to the input type that you want and generate parameters with the input type's attributes

###########################################################
###Having more than 1 input field in a single row
###########################################################
my $input_select_dobdd = {'type' => 'select', 'id' => 'dobdd', 'name' => 'dobdd', 'options' => \@ddoptions};
my $input_select_dobmm = {'type' => 'select', 'id' => 'dobmm', 'name' => 'dobmm', 'options' => \@mmoptions};
my $input_select_dobyy = {'type' => 'select', 'id' => 'dobyy', 'name' => 'dobyy', 'options' => \@yyoptions};
my $input_select = {'label' => {'text' => 'Birthday', for => 'dobdd'},
                    'input' => [$input_select_dobdd, $input_select_dobmm, $input_select_dobyy],
                    'error' => {'text' => 'Invalid date.'}};

#Then we add the input field into the Fieldset
#You can add using index of the fieldset
$fieldset->add_field($input_text);
$fieldset->add_field($input_select);
$fieldset->add_field($input_submit_button);

###########################################################
### Field value accessors
###########################################################
$form->set_field_value('name', 'Omid');
$form->get_field_value('name'); # Returns 'Omid'

###########################################################
### Error message accessors
###########################################################
$form->set_field_error_message('name',       'Your name is not good :)');
# or
$form->set_field_error_message('error_name', 'Your name is not good :)');

$form->get_field_error_message('name');       # Return 'Your name is not good :)'
# or
$form->get_field_error_message('error_name'); # Return 'Your name is not good :)'

#Finally, we output the form
print $form->build();

A full sample result

<form id="onlineIDForm" method="post" action="">
   <fieldset id="fieldset_one" name="fieldset_one" class="formclass">
       <div>
            <label for="name">Register Name</label>
            <em>:</em>
            <input type="text" value="John" id="name" name="name">
            <p id = "error_name" class="errorfield hidden">Name must be in alphanumeric</p>
            <p>Please tell us your name</p>
       </div>
       <div>
            <label for="mrms">Title</label>
            <em>:</em>
            <select id="mrms" name="mrms">
                <option value="Mr">Mr</option>
                <option value="Mrs">Mrs</option>
            </select>
            <p class="errorfield hidden">Please select a title</p>
       </div>
       <div>
            <label for="dob">Birthday</label>
            <em>:</em>
            <select id="dobdd" name="dobdd">
                <option value="1">1</option>
                <option value="2">2</option>
            </select>
            <select id="dobmm" name="dobmm">
                <option value="1">Jan</option>
                <option value="2">Feb</option>
            </select>
            <select id="dobyy" name="dobyy">
                <option value="1980">1980</option>
                <option value="1981">1981</option>
            </select>
            <p class="errorfield hidden">Invalid date</p>
       </div>
       <div>
            <input type="submit" value="Submit Form" id="submit" name="submit">
       </div>
   </fieldset>
</form>

How to create a form with validation

Please refer to

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AUTHOR

Chylli mailto:chylli@binary.com

CONTRIBUTOR

Fayland Lam mailto:fayland@binary.com

Tee Shuwn Yuan mailto:shuwnyuan@binary.com

COPYRIGHT AND LICENSE