クラス yii\widgets\ActiveField

                public function __toString()
{
    // __toString cannot throw exception
    // use trigger_error to bypass this limitation
    try {
        return $this->render();
    } catch (\Exception $e) {
        ErrorHandler::convertExceptionToError($e);
        return '';
    } catch (\Throwable $e) {
        ErrorHandler::convertExceptionToError($e);
        return '';
    }
}

            

                protected function addAriaAttributes(&$options)
{
    // Get proper attribute name when attribute name is tabular.
    $attributeName = Html::getAttributeName($this->attribute);
    if ($this->addAriaAttributes) {
        if (!isset($options['aria-required']) && $this->model->isAttributeRequired($attributeName)) {
            $options['aria-required'] = 'true';
        }
        if (!isset($options['aria-invalid']) && $this->model->hasErrors($attributeName)) {
            $options['aria-invalid'] = 'true';
        }
    }
}

            

                protected function addErrorClassIfNeeded(&$options)
{
    // Get proper attribute name when attribute name is tabular.
    $attributeName = Html::getAttributeName($this->attribute);
    if ($this->model->hasErrors($attributeName)) {
        Html::addCssClass($options, $this->form->errorCssClass);
    }
}

            

                protected function addRoleAttributes(&$options, $role)
{
    if (!isset($options['role'])) {
        $options['role'] = $role;
    }
}

            

                protected function adjustLabelFor($options)
{
    if (!isset($options['id'])) {
        return;
    }
    $this->_inputId = $options['id'];
    if (!isset($this->labelOptions['for'])) {
        $this->labelOptions['for'] = $options['id'];
    }
}

            

                public function begin()
{
    if ($this->form->enableClientScript) {
        $clientOptions = $this->getClientOptions();
        if (!empty($clientOptions)) {
            $this->form->attributes[] = $clientOptions;
        }
    }
    $inputID = $this->getInputId();
    $attribute = Html::getAttributeName($this->attribute);
    $options = $this->options;
    $class = isset($options['class']) ? (array) $options['class'] : [];
    $class[] = "field-$inputID";
    if ($this->model->isAttributeRequired($attribute)) {
        $class[] = $this->form->requiredCssClass;
    }
    $options['class'] = implode(' ', $class);
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_CONTAINER) {
        $this->addErrorClassIfNeeded($options);
    }
    $tag = ArrayHelper::remove($options, 'tag', 'div');
    return Html::beginTag($tag, $options);
}

            

                public function checkbox($options = [], $enclosedByLabel = true)
{
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    if ($enclosedByLabel) {
        $this->parts['{input}'] = Html::activeCheckbox($this->model, $this->attribute, $options);
        $this->parts['{label}'] = '';
    } else {
        if (isset($options['label']) && !isset($this->parts['{label}'])) {
            $this->parts['{label}'] = $options['label'];
            if (!empty($options['labelOptions'])) {
                $this->labelOptions = $options['labelOptions'];
            }
        }
        unset($options['labelOptions']);
        $options['label'] = null;
        $this->parts['{input}'] = Html::activeCheckbox($this->model, $this->attribute, $options);
    }
    return $this;
}

            

                public function checkboxList($items, $options = [])
{
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->_skipLabelFor = true;
    $this->parts['{input}'] = Html::activeCheckboxList($this->model, $this->attribute, $items, $options);
    return $this;
}

            

                public function dropDownList($items, $options = [])
{
    $options = array_merge($this->inputOptions, $options);
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->parts['{input}'] = Html::activeDropDownList($this->model, $this->attribute, $items, $options);
    return $this;
}

            

                public function end()
{
    return Html::endTag(ArrayHelper::keyExists('tag', $this->options) ? $this->options['tag'] : 'div');
}

            

                public function error($options = [])
{
    if ($options === false) {
        $this->parts['{error}'] = '';
        return $this;
    }
    $options = array_merge($this->errorOptions, $options);
    $this->parts['{error}'] = Html::error($this->model, $this->attribute, $options);
    return $this;
}

            

                public function fileInput($options = [])
{
    // https://github.com/yiisoft/yii2/pull/795
    if ($this->inputOptions !== ['class' => 'form-control']) {
        $options = array_merge($this->inputOptions, $options);
    }
    // https://github.com/yiisoft/yii2/issues/8779
    if (!isset($this->form->options['enctype'])) {
        $this->form->options['enctype'] = 'multipart/form-data';
    }
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->parts['{input}'] = Html::activeFileInput($this->model, $this->attribute, $options);
    return $this;
}

            

                protected function getClientOptions()
{
    $attribute = Html::getAttributeName($this->attribute);
    if (!in_array($attribute, $this->model->activeAttributes(), true)) {
        return [];
    }
    $clientValidation = $this->isClientValidationEnabled();
    $ajaxValidation = $this->isAjaxValidationEnabled();
    if ($clientValidation) {
        $validators = [];
        foreach ($this->model->getActiveValidators($attribute) as $validator) {
            /* @var $validator \yii\validators\Validator */
            $js = $validator->clientValidateAttribute($this->model, $attribute, $this->form->getView());
            if ($validator->enableClientValidation && $js != '') {
                if ($validator->whenClient !== null) {
                    $js = "if (({$validator->whenClient})(attribute, value)) { $js }";
                }
                $validators[] = $js;
            }
        }
    }
    if (!$ajaxValidation && (!$clientValidation || empty($validators))) {
        return [];
    }
    $options = [];
    $inputID = $this->getInputId();
    $options['id'] = $inputID ?: Html::getInputId($this->model, $this->attribute);
    $options['name'] = $this->attribute;
    $options['container'] = isset($this->selectors['container']) ? $this->selectors['container'] : ".field-$inputID";
    $options['input'] = isset($this->selectors['input']) ? $this->selectors['input'] : "#$inputID";
    if (isset($this->selectors['error'])) {
        $options['error'] = $this->selectors['error'];
    } elseif (isset($this->errorOptions['class'])) {
        $options['error'] = '.' . implode('.', preg_split('/\s+/', $this->errorOptions['class'], -1, PREG_SPLIT_NO_EMPTY));
    } else {
        $options['error'] = isset($this->errorOptions['tag']) ? $this->errorOptions['tag'] : 'span';
    }
    $options['encodeError'] = !isset($this->errorOptions['encode']) || $this->errorOptions['encode'];
    if ($ajaxValidation) {
        $options['enableAjaxValidation'] = true;
    }
    foreach (['validateOnChange', 'validateOnBlur', 'validateOnType', 'validationDelay'] as $name) {
        $options[$name] = $this->$name === null ? $this->form->$name : $this->$name;
    }
    if (!empty($validators)) {
        $options['validate'] = new JsExpression('function (attribute, value, messages, deferred, $form) {' . implode('', $validators) . '}');
    }
    if ($this->addAriaAttributes === false) {
        $options['updateAriaInvalid'] = false;
    }
    // only get the options that are different from the default ones (set in yii.activeForm.js)
    return array_diff_assoc($options, [
        'validateOnChange' => true,
        'validateOnBlur' => true,
        'validateOnType' => false,
        'validationDelay' => 500,
        'encodeError' => true,
        'error' => '.help-block',
        'updateAriaInvalid' => true,
    ]);
}

            

                protected function getInputId()
{
    return $this->_inputId ?: Html::getInputId($this->model, $this->attribute);
}

            

                public function hiddenInput($options = [])
{
    $options = array_merge($this->inputOptions, $options);
    $this->adjustLabelFor($options);
    $this->parts['{input}'] = Html::activeHiddenInput($this->model, $this->attribute, $options);
    return $this;
}

            

                public function hint($content, $options = [])
{
    if ($content === false) {
        $this->parts['{hint}'] = '';
        return $this;
    }
    $options = array_merge($this->hintOptions, $options);
    if ($content !== null) {
        $options['hint'] = $content;
    }
    $this->parts['{hint}'] = Html::activeHint($this->model, $this->attribute, $options);
    return $this;
}

            

                public function input($type, $options = [])
{
    $options = array_merge($this->inputOptions, $options);
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->parts['{input}'] = Html::activeInput($type, $this->model, $this->attribute, $options);
    return $this;
}

            

                protected function isAjaxValidationEnabled()
{
    return $this->enableAjaxValidation || $this->enableAjaxValidation === null && $this->form->enableAjaxValidation;
}

            

                protected function isClientValidationEnabled()
{
    return $this->enableClientValidation || $this->enableClientValidation === null && $this->form->enableClientValidation;
}

            

                public function label($label = null, $options = [])
{
    if ($label === false) {
        $this->parts['{label}'] = '';
        return $this;
    }
    $options = array_merge($this->labelOptions, $options);
    if ($label !== null) {
        $options['label'] = $label;
    }
    if ($this->_skipLabelFor) {
        $options['for'] = null;
    }
    $this->parts['{label}'] = Html::activeLabel($this->model, $this->attribute, $options);
    return $this;
}

            

                public function listBox($items, $options = [])
{
    $options = array_merge($this->inputOptions, $options);
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->parts['{input}'] = Html::activeListBox($this->model, $this->attribute, $items, $options);
    return $this;
}

            

                public function passwordInput($options = [])
{
    $options = array_merge($this->inputOptions, $options);
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->parts['{input}'] = Html::activePasswordInput($this->model, $this->attribute, $options);
    return $this;
}

            

                public function radio($options = [], $enclosedByLabel = true)
{
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    if ($enclosedByLabel) {
        $this->parts['{input}'] = Html::activeRadio($this->model, $this->attribute, $options);
        $this->parts['{label}'] = '';
    } else {
        if (isset($options['label']) && !isset($this->parts['{label}'])) {
            $this->parts['{label}'] = $options['label'];
            if (!empty($options['labelOptions'])) {
                $this->labelOptions = $options['labelOptions'];
            }
        }
        unset($options['labelOptions']);
        $options['label'] = null;
        $this->parts['{input}'] = Html::activeRadio($this->model, $this->attribute, $options);
    }
    return $this;
}

            

                public function radioList($items, $options = [])
{
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addRoleAttributes($options, 'radiogroup');
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->_skipLabelFor = true;
    $this->parts['{input}'] = Html::activeRadioList($this->model, $this->attribute, $items, $options);
    return $this;
}

            

                public function render($content = null)
{
    if ($content === null) {
        if (!isset($this->parts['{input}'])) {
            $this->textInput();
        }
        if (!isset($this->parts['{label}'])) {
            $this->label();
        }
        if (!isset($this->parts['{error}'])) {
            $this->error();
        }
        if (!isset($this->parts['{hint}'])) {
            $this->hint(null);
        }
        $content = strtr($this->template, $this->parts);
    } elseif (!is_string($content)) {
        $content = call_user_func($content, $this);
    }
    return $this->begin() . "\n" . $content . "\n" . $this->end();
}

            

                public function textInput($options = [])
{
    $options = array_merge($this->inputOptions, $options);
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->parts['{input}'] = Html::activeTextInput($this->model, $this->attribute, $options);
    return $this;
}

            

                public function textarea($options = [])
{
    $options = array_merge($this->inputOptions, $options);
    if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
        $this->addErrorClassIfNeeded($options);
    }
    $this->addAriaAttributes($options);
    $this->adjustLabelFor($options);
    $this->parts['{input}'] = Html::activeTextarea($this->model, $this->attribute, $options);
    return $this;
}

            

                public function widget($class, $config = [])
{
    /* @var $class \yii\base\Widget */
    $config['model'] = $this->model;
    $config['attribute'] = $this->attribute;
    $config['view'] = $this->form->getView();
    if (is_subclass_of($class, 'yii\widgets\InputWidget')) {
        foreach ($this->inputOptions as $key => $value) {
            if (!isset($config['options'][$key])) {
                $config['options'][$key] = $value;
            }
        }
        $config['field'] = $this;
        if (!isset($config['options'])) {
            $config['options'] = [];
        }
        if ($this->form->validationStateOn === ActiveForm::VALIDATION_STATE_ON_INPUT) {
            $this->addErrorClassIfNeeded($config['options']);
        }
        $this->addAriaAttributes($config['options']);
        $this->adjustLabelFor($config['options']);
    }
    $this->parts['{input}'] = $class::widget($config);
    return $this;
}