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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\base;
use ArrayAccess;
use ArrayIterator;
use ArrayObject;
use IteratorAggregate;
use ReflectionClass;
use Yii;
use yii\helpers\Inflector;
use yii\validators\RequiredValidator;
use yii\validators\Validator;
/**
* Model is the base class for data models.
*
* Model implements the following commonly used features:
*
* - attribute declaration: by default, every public class member is considered as
* a model attribute
* - attribute labels: each attribute may be associated with a label for display purpose
* - massive attribute assignment
* - scenario-based validation
*
* Model also raises the following events when performing data validation:
*
* - [[EVENT_BEFORE_VALIDATE]]: an event raised at the beginning of [[validate()]]
* - [[EVENT_AFTER_VALIDATE]]: an event raised at the end of [[validate()]]
*
* You may directly use Model to store model data, or extend it with customization.
*
* For more details and usage information on Model, see the [guide article on models](guide:structure-models).
*
* @property \yii\validators\Validator[] $activeValidators The validators applicable to the current
* [[scenario]]. This property is read-only.
* @property array $attributes Attribute values (name => value).
* @property array $errors An array of errors for all attributes. Empty array is returned if no error. The
* result is a two-dimensional array. See [[getErrors()]] for detailed description. This property is read-only.
* @property array $firstErrors The first errors. The array keys are the attribute names, and the array values
* are the corresponding error messages. An empty array will be returned if there is no error. This property is
* read-only.
* @property ArrayIterator $iterator An iterator for traversing the items in the list. This property is
* read-only.
* @property string $scenario The scenario that this model is in. Defaults to [[SCENARIO_DEFAULT]].
* @property ArrayObject|\yii\validators\Validator[] $validators All the validators declared in the model.
* This property is read-only.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class Model extends Component implements StaticInstanceInterface, IteratorAggregate, ArrayAccess, Arrayable
{
use ArrayableTrait;
use StaticInstanceTrait;
/**
* The name of the default scenario.
*/
const SCENARIO_DEFAULT = 'default';
/**
* @event ModelEvent an event raised at the beginning of [[validate()]]. You may set
* [[ModelEvent::isValid]] to be false to stop the validation.
*/
const EVENT_BEFORE_VALIDATE = 'beforeValidate';
/**
* @event Event an event raised at the end of [[validate()]]
*/
const EVENT_AFTER_VALIDATE = 'afterValidate';
/**
* @var array validation errors (attribute name => array of errors)
*/
private $_errors;
/**
* @var ArrayObject list of validators
*/
private $_validators;
/**
* @var string current scenario
*/
private $_scenario = self::SCENARIO_DEFAULT;
/**
* Returns the validation rules for attributes.
*
* Validation rules are used by [[validate()]] to check if attribute values are valid.
* Child classes may override this method to declare different validation rules.
*
* Each rule is an array with the following structure:
*
* ```php
* [
* ['attribute1', 'attribute2'],
* 'validator type',
* 'on' => ['scenario1', 'scenario2'],
* //...other parameters...
* ]
* ```
*
* where
*
* - attribute list: required, specifies the attributes array to be validated, for single attribute you can pass a string;
* - validator type: required, specifies the validator to be used. It can be a built-in validator name,
* a method name of the model class, an anonymous function, or a validator class name.
* - on: optional, specifies the [[scenario|scenarios]] array in which the validation
* rule can be applied. If this option is not set, the rule will apply to all scenarios.
* - additional name-value pairs can be specified to initialize the corresponding validator properties.
* Please refer to individual validator class API for possible properties.
*
* A validator can be either an object of a class extending [[Validator]], or a model class method
* (called *inline validator*) that has the following signature:
*
* ```php
* // $params refers to validation parameters given in the rule
* function validatorName($attribute, $params)
* ```
*
* In the above `$attribute` refers to the attribute currently being validated while `$params` contains an array of
* validator configuration options such as `max` in case of `string` validator. The value of the attribute currently being validated
* can be accessed as `$this->$attribute`. Note the `$` before `attribute`; this is taking the value of the variable
* `$attribute` and using it as the name of the property to access.
*
* Yii also provides a set of [[Validator::builtInValidators|built-in validators]].
* Each one has an alias name which can be used when specifying a validation rule.
*
* Below are some examples:
*
* ```php
* [
* // built-in "required" validator
* [['username', 'password'], 'required'],
* // built-in "string" validator customized with "min" and "max" properties
* ['username', 'string', 'min' => 3, 'max' => 12],
* // built-in "compare" validator that is used in "register" scenario only
* ['password', 'compare', 'compareAttribute' => 'password2', 'on' => 'register'],
* // an inline validator defined via the "authenticate()" method in the model class
* ['password', 'authenticate', 'on' => 'login'],
* // a validator of class "DateRangeValidator"
* ['dateRange', 'DateRangeValidator'],
* ];
* ```
*
* Note, in order to inherit rules defined in the parent class, a child class needs to
* merge the parent rules with child rules using functions such as `array_merge()`.
*
* @return array validation rules
* @see scenarios()
*/
public function rules()
{
return [];
}
/**
* Returns a list of scenarios and the corresponding active attributes.
*
* An active attribute is one that is subject to validation in the current scenario.
* The returned array should be in the following format:
*
* ```php
* [
* 'scenario1' => ['attribute11', 'attribute12', ...],
* 'scenario2' => ['attribute21', 'attribute22', ...],
* ...
* ]
* ```
*
* By default, an active attribute is considered safe and can be massively assigned.
* If an attribute should NOT be massively assigned (thus considered unsafe),
* please prefix the attribute with an exclamation character (e.g. `'!rank'`).
*
* The default implementation of this method will return all scenarios found in the [[rules()]]
* declaration. A special scenario named [[SCENARIO_DEFAULT]] will contain all attributes
* found in the [[rules()]]. Each scenario will be associated with the attributes that
* are being validated by the validation rules that apply to the scenario.
*
* @return array a list of scenarios and the corresponding active attributes.
*/
public function scenarios()
{
$scenarios = [self::SCENARIO_DEFAULT => []];
foreach ($this->getValidators() as $validator) {
foreach ($validator->on as $scenario) {
$scenarios[$scenario] = [];
}
foreach ($validator->except as $scenario) {
$scenarios[$scenario] = [];
}
}
$names = array_keys($scenarios);
foreach ($this->getValidators() as $validator) {
if (empty($validator->on) && empty($validator->except)) {
foreach ($names as $name) {
foreach ($validator->attributes as $attribute) {
$scenarios[$name][$attribute] = true;
}
}
} elseif (empty($validator->on)) {
foreach ($names as $name) {
if (!in_array($name, $validator->except, true)) {
foreach ($validator->attributes as $attribute) {
$scenarios[$name][$attribute] = true;
}
}
}
} else {
foreach ($validator->on as $name) {
foreach ($validator->attributes as $attribute) {
$scenarios[$name][$attribute] = true;
}
}
}
}
foreach ($scenarios as $scenario => $attributes) {
if (!empty($attributes)) {
$scenarios[$scenario] = array_keys($attributes);
}
}
return $scenarios;
}
/**
* Returns the form name that this model class should use.
*
* The form name is mainly used by [[\yii\widgets\ActiveForm]] to determine how to name
* the input fields for the attributes in a model. If the form name is "A" and an attribute
* name is "b", then the corresponding input name would be "A[b]". If the form name is
* an empty string, then the input name would be "b".
*
* The purpose of the above naming schema is that for forms which contain multiple different models,
* the attributes of each model are grouped in sub-arrays of the POST-data and it is easier to
* differentiate between them.
*
* By default, this method returns the model class name (without the namespace part)
* as the form name. You may override it when the model is used in different forms.
*
* @return string the form name of this model class.
* @see load()
* @throws InvalidConfigException when form is defined with anonymous class and `formName()` method is
* not overridden.
*/
public function formName()
{
$reflector = new ReflectionClass($this);
if (PHP_VERSION_ID >= 70000 && $reflector->isAnonymous()) {
throw new InvalidConfigException('The "formName()" method should be explicitly defined for anonymous models');
}
return $reflector->getShortName();
}
/**
* Returns the list of attribute names.
* By default, this method returns all public non-static properties of the class.
* You may override this method to change the default behavior.
* @return array list of attribute names.
*/
public function attributes()
{
$class = new ReflectionClass($this);
$names = [];
foreach ($class->getProperties(\ReflectionProperty::IS_PUBLIC) as $property) {
if (!$property->isStatic()) {
$names[] = $property->getName();
}
}
return $names;
}
/**
* Returns the attribute labels.
*
* Attribute labels are mainly used for display purpose. For example, given an attribute
* `firstName`, we can declare a label `First Name` which is more user-friendly and can
* be displayed to end users.
*
* By default an attribute label is generated using [[generateAttributeLabel()]].
* This method allows you to explicitly specify attribute labels.
*
* Note, in order to inherit labels defined in the parent class, a child class needs to
* merge the parent labels with child labels using functions such as `array_merge()`.
*
* @return array attribute labels (name => label)
* @see generateAttributeLabel()
*/
public function attributeLabels()
{
return [];
}
/**
* Returns the attribute hints.
*
* Attribute hints are mainly used for display purpose. For example, given an attribute
* `isPublic`, we can declare a hint `Whether the post should be visible for not logged in users`,
* which provides user-friendly description of the attribute meaning and can be displayed to end users.
*
* Unlike label hint will not be generated, if its explicit declaration is omitted.
*
* Note, in order to inherit hints defined in the parent class, a child class needs to
* merge the parent hints with child hints using functions such as `array_merge()`.
*
* @return array attribute hints (name => hint)
* @since 2.0.4
*/
public function attributeHints()
{
return [];
}
/**
* Performs the data validation.
*
* This method executes the validation rules applicable to the current [[scenario]].
* The following criteria are used to determine whether a rule is currently applicable:
*
* - the rule must be associated with the attributes relevant to the current scenario;
* - the rules must be effective for the current scenario.
*
* This method will call [[beforeValidate()]] and [[afterValidate()]] before and
* after the actual validation, respectively. If [[beforeValidate()]] returns false,
* the validation will be cancelled and [[afterValidate()]] will not be called.
*
* Errors found during the validation can be retrieved via [[getErrors()]],
* [[getFirstErrors()]] and [[getFirstError()]].
*
* @param string[]|string $attributeNames attribute name or list of attribute names that should be validated.
* If this parameter is empty, it means any attribute listed in the applicable
* validation rules should be validated.
* @param bool $clearErrors whether to call [[clearErrors()]] before performing validation
* @return bool whether the validation is successful without any error.
* @throws InvalidArgumentException if the current scenario is unknown.
*/
public function validate($attributeNames = null, $clearErrors = true)
{
if ($clearErrors) {
$this->clearErrors();
}
if (!$this->beforeValidate()) {
return false;
}
$scenarios = $this->scenarios();
$scenario = $this->getScenario();
if (!isset($scenarios[$scenario])) {
throw new InvalidArgumentException("Unknown scenario: $scenario");
}
if ($attributeNames === null) {
$attributeNames = $this->activeAttributes();
}
$attributeNames = (array)$attributeNames;
foreach ($this->getActiveValidators() as $validator) {
$validator->validateAttributes($this, $attributeNames);
}
$this->afterValidate();
return !$this->hasErrors();
}
/**
* This method is invoked before validation starts.
* The default implementation raises a `beforeValidate` event.
* You may override this method to do preliminary checks before validation.
* Make sure the parent implementation is invoked so that the event can be raised.
* @return bool whether the validation should be executed. Defaults to true.
* If false is returned, the validation will stop and the model is considered invalid.
*/
public function beforeValidate()
{
$event = new ModelEvent();
$this->trigger(self::EVENT_BEFORE_VALIDATE, $event);
return $event->isValid;
}
/**
* This method is invoked after validation ends.
* The default implementation raises an `afterValidate` event.
* You may override this method to do postprocessing after validation.
* Make sure the parent implementation is invoked so that the event can be raised.
*/
public function afterValidate()
{
$this->trigger(self::EVENT_AFTER_VALIDATE);
}
/**
* Returns all the validators declared in [[rules()]].
*
* This method differs from [[getActiveValidators()]] in that the latter
* only returns the validators applicable to the current [[scenario]].
*
* Because this method returns an ArrayObject object, you may
* manipulate it by inserting or removing validators (useful in model behaviors).
* For example,
*
* ```php
* $model->validators[] = $newValidator;
* ```
*
* @return ArrayObject|\yii\validators\Validator[] all the validators declared in the model.
*/
public function getValidators()
{
if ($this->_validators === null) {
$this->_validators = $this->createValidators();
}
return $this->_validators;
}
/**
* Returns the validators applicable to the current [[scenario]].
* @param string $attribute the name of the attribute whose applicable validators should be returned.
* If this is null, the validators for ALL attributes in the model will be returned.
* @return \yii\validators\Validator[] the validators applicable to the current [[scenario]].
*/
public function getActiveValidators($attribute = null)
{
$activeAttributes = $this->activeAttributes();
if ($attribute !== null && !in_array($attribute, $activeAttributes, true)) {
return [];
}
$scenario = $this->getScenario();
$validators = [];
foreach ($this->getValidators() as $validator) {
if ($attribute === null) {
$validatorAttributes = $validator->getValidationAttributes($activeAttributes);
$attributeValid = !empty($validatorAttributes);
} else {
$attributeValid = in_array($attribute, $validator->getValidationAttributes($attribute), true);
}
if ($attributeValid && $validator->isActive($scenario)) {
$validators[] = $validator;
}
}
return $validators;
}
/**
* Creates validator objects based on the validation rules specified in [[rules()]].
* Unlike [[getValidators()]], each time this method is called, a new list of validators will be returned.
* @return ArrayObject validators
* @throws InvalidConfigException if any validation rule configuration is invalid
*/
public function createValidators()
{
$validators = new ArrayObject();
foreach ($this->rules() as $rule) {
if ($rule instanceof Validator) {
$validators->append($rule);
} elseif (is_array($rule) && isset($rule[0], $rule[1])) { // attributes, validator type
$validator = Validator::createValidator($rule[1], $this, (array) $rule[0], array_slice($rule, 2));
$validators->append($validator);
} else {
throw new InvalidConfigException('Invalid validation rule: a rule must specify both attribute names and validator type.');
}
}
return $validators;
}
/**
* Returns a value indicating whether the attribute is required.
* This is determined by checking if the attribute is associated with a
* [[\yii\validators\RequiredValidator|required]] validation rule in the
* current [[scenario]].
*
* Note that when the validator has a conditional validation applied using
* [[\yii\validators\RequiredValidator::$when|$when]] this method will return
* `false` regardless of the `when` condition because it may be called be
* before the model is loaded with data.
*
* @param string $attribute attribute name
* @return bool whether the attribute is required
*/
public function isAttributeRequired($attribute)
{
foreach ($this->getActiveValidators($attribute) as $validator) {
if ($validator instanceof RequiredValidator && $validator->when === null) {
return true;
}
}
return false;
}
/**
* Returns a value indicating whether the attribute is safe for massive assignments.
* @param string $attribute attribute name
* @return bool whether the attribute is safe for massive assignments
* @see safeAttributes()
*/
public function isAttributeSafe($attribute)
{
return in_array($attribute, $this->safeAttributes(), true);
}
/**
* Returns a value indicating whether the attribute is active in the current scenario.
* @param string $attribute attribute name
* @return bool whether the attribute is active in the current scenario
* @see activeAttributes()
*/
public function isAttributeActive($attribute)
{
return in_array($attribute, $this->activeAttributes(), true);
}
/**
* Returns the text label for the specified attribute.
* @param string $attribute the attribute name
* @return string the attribute label
* @see generateAttributeLabel()
* @see attributeLabels()
*/
public function getAttributeLabel($attribute)
{
$labels = $this->attributeLabels();
return isset($labels[$attribute]) ? $labels[$attribute] : $this->generateAttributeLabel($attribute);
}
/**
* Returns the text hint for the specified attribute.
* @param string $attribute the attribute name
* @return string the attribute hint
* @see attributeHints()
* @since 2.0.4
*/
public function getAttributeHint($attribute)
{
$hints = $this->attributeHints();
return isset($hints[$attribute]) ? $hints[$attribute] : '';
}
/**
* Returns a value indicating whether there is any validation error.
* @param string|null $attribute attribute name. Use null to check all attributes.
* @return bool whether there is any error.
*/
public function hasErrors($attribute = null)
{
return $attribute === null ? !empty($this->_errors) : isset($this->_errors[$attribute]);
}
/**
* Returns the errors for all attributes or a single attribute.
* @param string $attribute attribute name. Use null to retrieve errors for all attributes.
* @property array An array of errors for all attributes. Empty array is returned if no error.
* The result is a two-dimensional array. See [[getErrors()]] for detailed description.
* @return array errors for all attributes or the specified attribute. Empty array is returned if no error.
* Note that when returning errors for all attributes, the result is a two-dimensional array, like the following:
*
* ```php
* [
* 'username' => [
* 'Username is required.',
* 'Username must contain only word characters.',
* ],
* 'email' => [
* 'Email address is invalid.',
* ]
* ]
* ```
*
* @see getFirstErrors()
* @see getFirstError()
*/
public function getErrors($attribute = null)
{
if ($attribute === null) {
return $this->_errors === null ? [] : $this->_errors;
}
return isset($this->_errors[$attribute]) ? $this->_errors[$attribute] : [];
}
/**
* Returns the first error of every attribute in the model.
* @return array the first errors. The array keys are the attribute names, and the array
* values are the corresponding error messages. An empty array will be returned if there is no error.
* @see getErrors()
* @see getFirstError()
*/
public function getFirstErrors()
{
if (empty($this->_errors)) {
return [];
}
$errors = [];
foreach ($this->_errors as $name => $es) {
if (!empty($es)) {
$errors[$name] = reset($es);
}
}
return $errors;
}
/**
* Returns the first error of the specified attribute.
* @param string $attribute attribute name.
* @return string the error message. Null is returned if no error.
* @see getErrors()
* @see getFirstErrors()
*/
public function getFirstError($attribute)
{
return isset($this->_errors[$attribute]) ? reset($this->_errors[$attribute]) : null;
}
/**
* Returns the errors for all attributes as a one-dimensional array.
* @param bool $showAllErrors boolean, if set to true every error message for each attribute will be shown otherwise
* only the first error message for each attribute will be shown.
* @return array errors for all attributes as a one-dimensional array. Empty array is returned if no error.
* @see getErrors()
* @see getFirstErrors()
* @since 2.0.14
*/
public function getErrorSummary($showAllErrors)
{
$lines = [];
$errors = $showAllErrors ? $this->getErrors() : $this->getFirstErrors();
foreach ($errors as $es) {
$lines = array_merge((array)$es, $lines);
}
return $lines;
}
/**
* Adds a new error to the specified attribute.
* @param string $attribute attribute name
* @param string $error new error message
*/
public function addError($attribute, $error = '')
{
$this->_errors[$attribute][] = $error;
}
/**
* Adds a list of errors.
* @param array $items a list of errors. The array keys must be attribute names.
* The array values should be error messages. If an attribute has multiple errors,
* these errors must be given in terms of an array.
* You may use the result of [[getErrors()]] as the value for this parameter.
* @since 2.0.2
*/
public function addErrors(array $items)
{
foreach ($items as $attribute => $errors) {
if (is_array($errors)) {
foreach ($errors as $error) {
$this->addError($attribute, $error);
}
} else {
$this->addError($attribute, $errors);
}
}
}
/**
* Removes errors for all attributes or a single attribute.
* @param string $attribute attribute name. Use null to remove errors for all attributes.
*/
public function clearErrors($attribute = null)
{
if ($attribute === null) {
$this->_errors = [];
} else {
unset($this->_errors[$attribute]);
}
}
/**
* Generates a user friendly attribute label based on the give attribute name.
* This is done by replacing underscores, dashes and dots with blanks and
* changing the first letter of each word to upper case.
* For example, 'department_name' or 'DepartmentName' will generate 'Department Name'.
* @param string $name the column name
* @return string the attribute label
*/
public function generateAttributeLabel($name)
{
return Inflector::camel2words($name, true);
}
/**
* Returns attribute values.
* @param array $names list of attributes whose value needs to be returned.
* Defaults to null, meaning all attributes listed in [[attributes()]] will be returned.
* If it is an array, only the attributes in the array will be returned.
* @param array $except list of attributes whose value should NOT be returned.
* @return array attribute values (name => value).
*/
public function getAttributes($names = null, $except = [])
{
$values = [];
if ($names === null) {
$names = $this->attributes();
}
foreach ($names as $name) {
$values[$name] = $this->$name;
}
foreach ($except as $name) {
unset($values[$name]);
}
return $values;
}
/**
* Sets the attribute values in a massive way.
* @param array $values attribute values (name => value) to be assigned to the model.
* @param bool $safeOnly whether the assignments should only be done to the safe attributes.
* A safe attribute is one that is associated with a validation rule in the current [[scenario]].
* @see safeAttributes()
* @see attributes()
*/
public function setAttributes($values, $safeOnly = true)
{
if (is_array($values)) {
$attributes = array_flip($safeOnly ? $this->safeAttributes() : $this->attributes());
foreach ($values as $name => $value) {
if (isset($attributes[$name])) {
$this->$name = $value;
} elseif ($safeOnly) {
$this->onUnsafeAttribute($name, $value);
}
}
}
}
/**
* This method is invoked when an unsafe attribute is being massively assigned.
* The default implementation will log a warning message if YII_DEBUG is on.
* It does nothing otherwise.
* @param string $name the unsafe attribute name
* @param mixed $value the attribute value
*/
public function onUnsafeAttribute($name, $value)
{
if (YII_DEBUG) {
Yii::debug("Failed to set unsafe attribute '$name' in '" . get_class($this) . "'.", __METHOD__);
}
}
/**
* Returns the scenario that this model is used in.
*
* Scenario affects how validation is performed and which attributes can
* be massively assigned.
*
* @return string the scenario that this model is in. Defaults to [[SCENARIO_DEFAULT]].
*/
public function getScenario()
{
return $this->_scenario;
}
/**
* Sets the scenario for the model.
* Note that this method does not check if the scenario exists or not.
* The method [[validate()]] will perform this check.
* @param string $value the scenario that this model is in.
*/
public function setScenario($value)
{
$this->_scenario = $value;
}
/**
* Returns the attribute names that are safe to be massively assigned in the current scenario.
* @return string[] safe attribute names
*/
public function safeAttributes()
{
$scenario = $this->getScenario();
$scenarios = $this->scenarios();
if (!isset($scenarios[$scenario])) {
return [];
}
$attributes = [];
foreach ($scenarios[$scenario] as $attribute) {
if ($attribute[0] !== '!' && !in_array('!' . $attribute, $scenarios[$scenario])) {
$attributes[] = $attribute;
}
}
return $attributes;
}
/**
* Returns the attribute names that are subject to validation in the current scenario.
* @return string[] safe attribute names
*/
public function activeAttributes()
{
$scenario = $this->getScenario();
$scenarios = $this->scenarios();
if (!isset($scenarios[$scenario])) {
return [];
}
$attributes = array_keys(array_flip($scenarios[$scenario]));
foreach ($attributes as $i => $attribute) {
if ($attribute[0] === '!') {
$attributes[$i] = substr($attribute, 1);
}
}
return $attributes;
}
/**
* Populates the model with input data.
*
* This method provides a convenient shortcut for:
*
* ```php
* if (isset($_POST['FormName'])) {
* $model->attributes = $_POST['FormName'];
* if ($model->save()) {
* // handle success
* }
* }
* ```
*
* which, with `load()` can be written as:
*
* ```php
* if ($model->load($_POST) && $model->save()) {
* // handle success
* }
* ```
*
* `load()` gets the `'FormName'` from the model's [[formName()]] method (which you may override), unless the
* `$formName` parameter is given. If the form name is empty, `load()` populates the model with the whole of `$data`,
* instead of `$data['FormName']`.
*
* Note, that the data being populated is subject to the safety check by [[setAttributes()]].
*
* @param array $data the data array to load, typically `$_POST` or `$_GET`.
* @param string $formName the form name to use to load the data into the model.
* If not set, [[formName()]] is used.
* @return bool whether `load()` found the expected form in `$data`.
*/
public function load($data, $formName = null)
{
$scope = $formName === null ? $this->formName() : $formName;
if ($scope === '' && !empty($data)) {
$this->setAttributes($data);
return true;
} elseif (isset($data[$scope])) {
$this->setAttributes($data[$scope]);
return true;
}
return false;
}
/**
* Populates a set of models with the data from end user.
* This method is mainly used to collect tabular data input.
* The data to be loaded for each model is `$data[formName][index]`, where `formName`
* refers to the value of [[formName()]], and `index` the index of the model in the `$models` array.
* If [[formName()]] is empty, `$data[index]` will be used to populate each model.
* The data being populated to each model is subject to the safety check by [[setAttributes()]].
* @param array $models the models to be populated. Note that all models should have the same class.
* @param array $data the data array. This is usually `$_POST` or `$_GET`, but can also be any valid array
* supplied by end user.
* @param string $formName the form name to be used for loading the data into the models.
* If not set, it will use the [[formName()]] value of the first model in `$models`.
* This parameter is available since version 2.0.1.
* @return bool whether at least one of the models is successfully populated.
*/
public static function loadMultiple($models, $data, $formName = null)
{
if ($formName === null) {
/* @var $first Model|false */
$first = reset($models);
if ($first === false) {
return false;
}
$formName = $first->formName();
}
$success = false;
foreach ($models as $i => $model) {
/* @var $model Model */
if ($formName == '') {
if (!empty($data[$i]) && $model->load($data[$i], '')) {
$success = true;
}
} elseif (!empty($data[$formName][$i]) && $model->load($data[$formName][$i], '')) {
$success = true;
}
}
return $success;
}
/**
* Validates multiple models.
* This method will validate every model. The models being validated may
* be of the same or different types.
* @param array $models the models to be validated
* @param array $attributeNames list of attribute names that should be validated.
* If this parameter is empty, it means any attribute listed in the applicable
* validation rules should be validated.
* @return bool whether all models are valid. False will be returned if one
* or multiple models have validation error.
*/
public static function validateMultiple($models, $attributeNames = null)
{
$valid = true;
/* @var $model Model */
foreach ($models as $model) {
$valid = $model->validate($attributeNames) && $valid;
}
return $valid;
}
/**
* Returns the list of fields that should be returned by default by [[toArray()]] when no specific fields are specified.
*
* A field is a named element in the returned array by [[toArray()]].
*
* This method should return an array of field names or field definitions.
* If the former, the field name will be treated as an object property name whose value will be used
* as the field value. If the latter, the array key should be the field name while the array value should be
* the corresponding field definition which can be either an object property name or a PHP callable
* returning the corresponding field value. The signature of the callable should be:
*
* ```php
* function ($model, $field) {
* // return field value
* }
* ```
*
* For example, the following code declares four fields:
*
* - `email`: the field name is the same as the property name `email`;
* - `firstName` and `lastName`: the field names are `firstName` and `lastName`, and their
* values are obtained from the `first_name` and `last_name` properties;
* - `fullName`: the field name is `fullName`. Its value is obtained by concatenating `first_name`
* and `last_name`.
*
* ```php
* return [
* 'email',
* 'firstName' => 'first_name',
* 'lastName' => 'last_name',
* 'fullName' => function ($model) {
* return $model->first_name . ' ' . $model->last_name;
* },
* ];
* ```
*
* In this method, you may also want to return different lists of fields based on some context
* information. For example, depending on [[scenario]] or the privilege of the current application user,
* you may return different sets of visible fields or filter out some fields.
*
* The default implementation of this method returns [[attributes()]] indexed by the same attribute names.
*
* @return array the list of field names or field definitions.
* @see toArray()
*/
public function fields()
{
$fields = $this->attributes();
return array_combine($fields, $fields);
}
/**
* Returns an iterator for traversing the attributes in the model.
* This method is required by the interface [[\IteratorAggregate]].
* @return ArrayIterator an iterator for traversing the items in the list.
*/
public function getIterator()
{
$attributes = $this->getAttributes();
return new ArrayIterator($attributes);
}
/**
* Returns whether there is an element at the specified offset.
* This method is required by the SPL interface [[\ArrayAccess]].
* It is implicitly called when you use something like `isset($model[$offset])`.
* @param mixed $offset the offset to check on.
* @return bool whether or not an offset exists.
*/
public function offsetExists($offset)
{
return isset($this->$offset);
}
/**
* Returns the element at the specified offset.
* This method is required by the SPL interface [[\ArrayAccess]].
* It is implicitly called when you use something like `$value = $model[$offset];`.
* @param mixed $offset the offset to retrieve element.
* @return mixed the element at the offset, null if no element is found at the offset
*/
public function offsetGet($offset)
{
return $this->$offset;
}
/**
* Sets the element at the specified offset.
* This method is required by the SPL interface [[\ArrayAccess]].
* It is implicitly called when you use something like `$model[$offset] = $item;`.
* @param int $offset the offset to set element
* @param mixed $item the element value
*/
public function offsetSet($offset, $item)
{
$this->$offset = $item;
}
/**
* Sets the element value at the specified offset to null.
* This method is required by the SPL interface [[\ArrayAccess]].
* It is implicitly called when you use something like `unset($model[$offset])`.
* @param mixed $offset the offset to unset element
*/
public function offsetUnset($offset)
{
$this->$offset = null;
}
}