Class SelectBoxWidget
Input widget class for generating a selectbox.
This class is usually used internally by Cake\View\Helper\FormHelper,
it but can be used to generate standalone select boxes.
Property Summary
-
$_templates protected
Cake\View\StringTemplateStringTemplate instance.
-
$defaults protected
arrayData defaults.
Method Summary
-
__construct() public
Constructor.
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_emptyValue() protected
Generate the empty value based on the input.
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_isDisabled() protected
Helper method for deciding what options are disabled.
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_isSelected() protected
Helper method for deciding what options are selected.
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_renderContent() protected
Render the contents of the select element.
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_renderOptgroup() protected
Render the contents of an optgroup element.
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_renderOptions() protected
Render a set of options.
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mergeDefaults() protected
Merge default values with supplied data.
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render() public
Render a select box form input.
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secureFields() public
Returns a list of fields that need to be secured for this widget.
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setMaxLength() protected
Set value for "maxlength" attribute if applicable.
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setRequired() protected
Set value for "required" attribute if applicable.
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setStep() protected
Set value for "step" attribute if applicable.
Method Detail
__construct() ¶ public
__construct(Cake\View\StringTemplate $templates)Constructor.
Parameters
-
Cake\View\StringTemplate$templates Templates list.
_emptyValue() ¶ protected
_emptyValue(string|bool|array $value): arrayGenerate the empty value based on the input.
Parameters
-
string|bool|array$value The provided empty value.
Returns
array_isDisabled() ¶ protected
_isDisabled(string $key, string[]|null $disabled): boolHelper method for deciding what options are disabled.
Parameters
-
string$key The key to test.
-
string[]|null$disabled The disabled values.
Returns
bool_isSelected() ¶ protected
_isSelected(string $key, string[]|string|int|false|null $selected): boolHelper method for deciding what options are selected.
Parameters
-
string$key The key to test.
-
string[]|string|int|false|null$selected The selected values.
Returns
bool_renderContent() ¶ protected
_renderContent(array $data): arrayRender the contents of the select element.
Parameters
-
array$data The context for rendering a select.
Returns
array_renderOptgroup() ¶ protected
_renderOptgroup(string $label, arrayArrayAccess $optgroup, array|null $disabled, array|string|null $selected, array $templateVars, bool $escape): stringRender the contents of an optgroup element.
Parameters
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string$label The optgroup label text
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arrayArrayAccess$optgroup The opt group data.
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array|null$disabled The options to disable.
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array|string|null$selected The options to select.
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array$templateVars Additional template variables.
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bool$escape Toggle HTML escaping
Returns
string_renderOptions() ¶ protected
_renderOptions(iterable $options, array|null $disabled, array|string|null $selected, array $templateVars, bool $escape): string[]Render a set of options.
Will recursively call itself when option groups are in use.
Parameters
-
iterable$options The options to render.
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array|null$disabled The options to disable.
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array|string|null$selected The options to select.
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array$templateVars Additional template variables.
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bool$escape Toggle HTML escaping.
Returns
string[]mergeDefaults() ¶ protected
mergeDefaults(array $data, Cake\View\Form\ContextInterface $context): arrayMerge default values with supplied data.
Parameters
-
array$data Data array
-
Cake\View\Form\ContextInterface$context Context instance.
Returns
arrayrender() ¶ public
render(array $data, Cake\View\Form\ContextInterface $context): stringRender a select box form input.
Render a select box input given a set of data. Supported keys are:
name- Set the input name.options- An array of options.disabled- Either true or an array of options to disable. When true, the select element will be disabled.val- Either a string or an array of options to mark as selected.empty- Set to true to add an empty option at the top of the option elements. Set to a string to define the display text of the empty option. If an array is used the key will set the value of the empty option while, the value will set the display text.escape- Set to false to disable HTML escaping.
Options format
The options option can take a variety of data format depending on the complexity of HTML you want generated.
You can generate simple options using a basic associative array:
'options' => ['elk' => 'Elk', 'beaver' => 'Beaver']If you need to define additional attributes on your option elements you can use the complex form for options:
'options' => [
['value' => 'elk', 'text' => 'Elk', 'data-foo' => 'bar'],
]This form requires that both the value and text keys be defined.
If either is not set options will not be generated correctly.
If you need to define option groups you can do those using nested arrays:
'options' => [
'Mammals' => [
'elk' => 'Elk',
'beaver' => 'Beaver'
]
]And finally, if you need to put attributes on your optgroup elements you can do that with a more complex nested array form:
'options' => [
[
'text' => 'Mammals',
'data-id' => 1,
'options' => [
'elk' => 'Elk',
'beaver' => 'Beaver'
]
],
]You are free to mix each of the forms in the same option set, and nest complex types as required.
Parameters
-
array$data Data to render with.
-
Cake\View\Form\ContextInterface$context The current form context.
Returns
stringThrows
RuntimeExceptionwhen the name attribute is empty.
secureFields() ¶ public
secureFields(array $data): string[]Returns a list of fields that need to be secured for this widget.
Parameters
-
array$data
Returns
string[]setMaxLength() ¶ protected
setMaxLength(array $data, Cake\View\Form\ContextInterface $context, string $fieldName): arraySet value for "maxlength" attribute if applicable.
Parameters
-
array$data Data array
-
Cake\View\Form\ContextInterface$context Context instance.
-
string$fieldName Field name.
Returns
arraysetRequired() ¶ protected
setRequired(array $data, Cake\View\Form\ContextInterface $context, string $fieldName): arraySet value for "required" attribute if applicable.
Parameters
-
array$data Data array
-
Cake\View\Form\ContextInterface$context Context instance.
-
string$fieldName Field name.
Returns
arraysetStep() ¶ protected
setStep(array $data, Cake\View\Form\ContextInterface $context, string $fieldName): arraySet value for "step" attribute if applicable.
Parameters
-
array$data Data array
-
Cake\View\Form\ContextInterface$context Context instance.
-
string$fieldName Field name.
Returns
array