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220 lines
6.9 KiB
PHP
220 lines
6.9 KiB
PHP
<?php
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/**
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* CModel class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.yiiframework.com/
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* @copyright Copyright © 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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/**
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* CModel is the base class providing the common features needed by data model objects.
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*
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* CModel defines the basic framework for data models that need to be validated.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id$
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* @package system.base
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* @since 1.0
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*/
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abstract class CModel extends CComponent
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{
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private $_errors=array(); // attribute name => array of errors
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/**
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* Performs the validation.
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* This method executes every validation rule as declared in {@link rules}.
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* Errors found during the validation can be retrieved via {@link getErrors}.
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* @param array the list of attributes to be validated. Defaults to null,
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* meaning every attribute as listed in {@link rules} will be validated.
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* @return boolean whether the validation is successful without any error.
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*/
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public function validate($attributes=null)
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{
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$this->clearErrors();
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if($this->beforeValidate())
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{
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foreach($this->createValidators() as $validator)
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$validator->validate($this,$attributes);
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$this->afterValidate();
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return !$this->hasErrors();
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}
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else
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return false;
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}
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/**
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* This method is invoked before validation starts.
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* You may override this method to do preliminary checks before validation.
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* @return boolean whether validation should be executed. Defaults to true.
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*/
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protected function beforeValidate()
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{
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return true;
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}
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/**
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* This method is invoked after validation ends.
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* You may override this method to do postprocessing after validation.
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*/
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protected function afterValidate()
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{
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}
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/**
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* @return array validators built based on {@link rules()}.
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*/
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public function createValidators()
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{
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$validators=array();
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foreach($this->rules() as $rule)
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{
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if(isset($rule[0],$rule[1])) // attributes, validator name
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$validators[]=CValidator::createValidator($rule[1],$this,$rule[0],array_slice($rule,2));
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else
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throw new CException(Yii::t('yii','{class} has an invalid validation rule. The rule must specify attributes to be validated and the validator name.',
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array('{class}'=>get_class($this))));
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}
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return $validators;
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}
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/**
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* Returns the attribute labels.
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* Attribute labels are mainly used in error messages of validation.
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* By default an attribute label is generated using {@link generateAttributeLabel}.
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* This method allows you to explicitly specify attribute labels.
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*
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* Note, in order to inherit labels defined in the parent class, a child class needs to
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* merge the parent labels with child labels using functions like array_merge().
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*
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* @return array attribute labels (name=>label)
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* @see generateAttributeLabel
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*/
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public function attributeLabels()
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{
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return array();
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}
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/**
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* Returns the validation rules for attributes.
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*
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* This method should be overridden to declare validation rules.
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* Each rule is an array with the following structure:
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* <pre>
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* array('attribute list', 'validator name', 'on'=>'insert', ...validation parameters...)
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* </pre>
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* where
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* <ul>
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* <li>attribute list: specifies the attributes to be validated;</li>
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* <li>validator name: specifies the validator to be used. It can be a class name (or class in dot syntax),
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* or a validation method in the AR class. A validator class must extend from {@link CValidator},
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* while a validation method must have the following signature:
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* <pre>
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* function validatorName($attribute,$params)
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* </pre>
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* When using a built-in validator class, you can use an alias name instead of the full class name.
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* For example, you can use "required" instead of "system.validators.CRequiredValidator".
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* For more details, see {@link CValidator}.</li>
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* <li>on: this is used in {@link CActiveRecord}. It specifies when the validation should be performed.
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* It can be either 'insert' or 'update'. If not set, the validation will apply to both 'insert' and 'update' operations.</li>
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* <li>additional parameters are used to initialize the corresponding validator properties. See {@link CValidator}
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* for possible properties.</li>
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* </ul>
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*
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* The following are some examples:
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* <pre>
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* array(
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* array('username', 'length', 'min'=>3, 'max'=>12),
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* array('password', 'compare', 'compareAttribute'=>'password2'),
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* array('password', 'authenticate'),
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* );
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* </pre>
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*
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* Note, in order to inherit rules defined in the parent class, a child class needs to
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* merge the parent rules with child rules using functions like array_merge().
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*
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* @return array validation rules to be applied when {@link validate()} is called.
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*/
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public function rules()
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{
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return array();
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}
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/**
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* Returns the text label for the specified attribute.
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* @param string the attribute name
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* @return string the attribute label
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* @see generateAttributeLabel
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*/
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public function getAttributeLabel($attribute)
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{
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$labels=$this->attributeLabels();
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if(isset($labels[$attribute]))
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return $labels[$attribute];
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else
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return $this->generateAttributeLabel($attribute);
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}
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/**
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* Returns a value indicating whether there is any error.
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* @param string attribute name. Use null to check all attributes.
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* @return boolean whether there is any error.
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*/
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public function hasErrors($attribute=null)
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{
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if($attribute===null)
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return $this->_errors!==array();
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else
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return isset($this->_errors[$attribute]);
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}
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/**
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* Returns errors for all attribute or a single attribute.
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* @param string attribute name. Use null to retrieve errors for all attributes.
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* @return array errors for all attributes or the specified attribute. Empty array is returned if no error.
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*/
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public function getErrors($attribute=null)
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{
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if($attribute===null)
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return $this->_errors;
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else
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return isset($this->_errors[$attribute]) ? $this->_errors[$attribute] : array();
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}
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/**
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* Adds a new error to the specified attribute.
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* @param string attribute name
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* @param string new error message
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*/
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public function addError($attribute,$error)
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{
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$this->_errors[$attribute][]=$error;
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}
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/**
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* Removes errors for all attributes or a single attribute.
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* @param string attribute name. Use null to remove errors for all attribute.
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*/
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public function clearErrors($attribute=null)
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{
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if($attribute===null)
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$this->_errors=array();
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else
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unset($this->_errors[$attribute]);
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}
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/**
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* Generates a user friendly attribute label.
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* This is done by replacing underscores or dashes with blanks and
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* changing the first letter of each word to upper case.
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* For example, 'department_name' or 'DepartmentName' becomes 'Department Name'.
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* @param string the column name
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* @return string the attribute label
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*/
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public function generateAttributeLabel($name)
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{
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return ucwords(trim(strtolower(str_replace(array('-','_'),' ',preg_replace('/(?<![A-Z])[A-Z]/', ' \0', $name)))));
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}
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} |