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|
/**
* Base DataMapper Model
*
* @package phpDataMapper
* @link http://phpdatamapper.com
* @link http://github.com/vlucas/phpDataMapper
*/
class phpDataMapper_Base
{
// Class Names for required classes - Here so they can be easily overridden
protected $_entityClass = 'phpDataMapper_Entity';
protected $_queryClass = 'phpDataMapper_Query';
protected $_collectionClass = 'phpDataMapper_Collection';
protected $_exceptionClass = 'phpDataMapper_Exception';
// Stored adapter connections
protected $_adapter;
protected $_adapterRead;
// Array of error messages and types
protected $_errors = array();
// Query log
protected static $_queryLog = array();
// Store cached field info
protected $_fields = array();
protected $_relations = array();
protected $_primaryKey;
// Data source setup info
protected $_datasource;
/**
=== EXAMPLE fields ===
public $id = array('type' => 'int', 'primary' => true);
public $name = array('type' => 'string', 'required' => true);
public $date_created = array('type' => 'datetime');
=== EXAMPLE Relationship associations ===
public $comments = array(
'type' => 'relation',
'relation' => 'HasMany',
'mapper' => 'CommentsModel',
'where' => array('comment_id' => 'entity.id'),
);
======================
*/
/**
* Constructor Method
*/
public function __construct(phpDataMapper_Adapter_Interface $adapter, $adapterRead = null)
{
$this->_adapter = $adapter;
// Ensure required classes for minimum activity are loaded
$this->loadClass($this->_entityClass);
$this->loadClass($this->_queryClass);
$this->loadClass($this->_collectionClass);
$this->loadClass($this->_exceptionClass);
// Slave adapter if given (usually for reads)
if(null !== $adapterRead) {
if($adapterRead instanceof phpDataMapper_Adapter_Interface) {
$this->_adapterRead = $adapterRead;
} else {
throw new InvalidArgumentException("Secondary/Slave adapter must implement 'phpDataMapper_Adapter_Interface'");
}
}
// Ensure table has been defined
if(!$this->_datasource) {
throw new $this->_exceptionClass("Error: Datasource name must be defined - please define the \$_datasource variable. This can be a database table name, collection or bucket name, a file name, or a URL, depending on your adapter.");
}
// Ensure fields have been defined for current table
if(!$this->fields()) {
throw new $this->_exceptionClass("Error: Fields must be defined");
}
// Call init for extension without overriding constructor
$this->init();
}
/**
* Initialization function, run immediately after __construct() so that the constructor is never overridden
*/
public function init()
{
}
/**
* Get current adapter object
*/
public function adapter()
{
return $this->_adapter;
}
/**
* Get adapter object that will serve as the 'slave' for reads
*/
public function adapterRead()
{
if($this->_adapterRead) {
return $this->_adapterRead;
} else {
return $this->_adapter;
}
}
/**
* Get entity class name to use
*
* @return string
*/
public function entityClass()
{
return $this->_entityClass;
}
/**
* Get query class name to use
*
* @return string
*/
public function queryClass()
{
return $this->_queryClass;
}
/**
* Get collection class name to use
*
* @return string
*/
public function collectionClass()
{
return $this->_collectionClass;
}
/**
* Get name of the data source
*/
public function datasource()
{
return $this->_datasource;
}
/**
* Get formatted fields with all neccesary array keys and values.
* Merges defaults with defined field values to ensure all options exist for each field.
*
* @return array Defined fields plus all defaults for full array of all possible options
*/
public function fields()
{
if($this->_fields) {
$returnFields = $this->_fields;
} else {
$getFields = create_function('$obj', 'return get_object_vars($obj);');
$fields = $getFields($this);
// Default settings for all fields
$fieldDefaults = array(
'type' => 'string',
'default' => null,
'length' => null,
'required' => false,
'null' => true,
'unsigned' => false,
'primary' => false,
'index' => false,
'unique' => false,
'serial' => false,
'relation' => false
);
// Type default overrides for specific field types
$fieldTypeDefaults = array(
'string' => array(
'length' => 255
),
'float' => array(
'length' => array(10,2)
),
'int' => array(
'length' => 10,
'unsigned' => true
)
);
$returnFields = array();
foreach($fields as $fieldName => $fieldOpts) {
// Format field will full set of default options
if(isset($fieldInfo['type']) && isset($fieldTypeDefaults[$fieldOpts['type']])) {
// Include type defaults
$fieldOpts = array_merge($fieldDefaults, $fieldTypeDefaults[$fieldOpts['type']], $fieldOpts);
} else {
// Merge with defaults
$fieldOpts = array_merge($fieldDefaults, $fieldOpts);
}
// Store primary key
if($fieldOpts['primary'] === true) {
$this->_primaryKey = $fieldName;
}
// Store relations (and remove them from the mix of regular fields)
if($fieldOpts['type'] == 'relation') {
$this->_relations[$fieldName] = $fieldOpts;
continue; // skip, not a field
}
$returnFields[$fieldName] = $fieldOpts;
}
$this->_fields = $returnFields;
}
return $returnFields;
}
/**
* Get defined relations
*/
public function relations()
{
if(!$this->_relations) {
$this->fields();
}
return $this->_relations;
}
/**
* Get value of primary key for given row result
*/
public function primaryKey(phpDataMapper_Entity $entity)
{
$pkField = $this->primaryKeyField();
return $entity->$pkField;
}
/**
* Get value of primary key for given row result
*/
public function primaryKeyField()
{
return $this->_primaryKey;
}
/**
* Check if field exists in defined fields
*/
public function fieldExists($field)
{
return array_key_exists($field, $this->fields());
}
/**
* Load record from primary key
*/
public function get($primaryKeyValue = 0)
{
// Create new row object
if(!$primaryKeyValue) {
$entity = new $this->_entityClass();
// Find record by primary key
} else {
$entity = $this->first(array($this->primaryKeyField() => $primaryKeyValue));
}
return $entity;
}
/**
* Load defined relations
*/
public function getRelationsFor(phpDataMapper_Entity $entity)
{
$relatedColumns = array();
$rels = $this->getEntityRelationWithValues($entity);
if(count($rels) > 0) {
foreach($rels as $column => $relation) {
$mapperName = isset($relation['mapper']) ? $relation['mapper'] : false;
if(!$mapperName) {
throw new $this->_exceptionClass("Relationship mapper for '" . $column . "' has not been defined.");
}
// Set conditions for relation query
$relConditions = array();
if(isset($relation['where'])) {
$relConditions = $relation['where'];
}
// Create new instance of mapper
$mapper = new $mapperName($this->adapter());
// Load relation class
$relationClass = 'phpDataMapper_Relation_' . $relation['relation'];
if($loadedRel = $this->loadClass($relationClass)) {
// Set column equal to relation class instance
$relationObj = new $relationClass($mapper, $relConditions, $relation);
$relatedColumns[$column] = $relationObj;
}
}
}
return (count($relatedColumns) > 0) ? $relatedColumns : false;
}
/**
* Replace entity value placeholders on relation definitions
* Currently replaces 'entity.[col]' with the column value from the passed entity object
*/
public function getEntityRelationWithValues(phpDataMapper_Entity $entity)
{
$rels = $this->relations();
if(count($rels) > 0) {
foreach($rels as $column => $relation) {
// Load foreign keys with data from current row
// Replace 'entity.[col]' with the column value from the passed entity object
if(isset($relation['where'])) {
foreach($relation['where'] as $relationCol => $col) {
if(is_string($col) && strpos($col, 'entity.') !== false) {
$col = str_replace('entity.', '', $col);
$rels[$column]['where'][$relationCol] = $entity->$col;
}
}
}
}
}
return $rels;
}
/**
* Get result set for given PDO Statement
*/
public function getResultSet($stmt)
{
if($stmt instanceof PDOStatement) {
$results = array();
$resultsIdentities = array();
// Set object to fetch results into
$stmt->setFetchMode(PDO::FETCH_CLASS, $this->_entityClass);
// Fetch all results into new DataMapper_Result class
while($entity = $stmt->fetch(PDO::FETCH_CLASS)) {
// Load relations for this row
$relations = $this->getRelationsFor($entity);
if($relations && is_array($relations) && count($relations) > 0) {
foreach($relations as $relationCol => $relationObj) {
$entity->$relationCol = $relationObj;
}
}
// Store in array for ResultSet
$results[] = $entity;
// Store primary key of each unique record in set
$pk = $this->primaryKey($entity);
if(!in_array($pk, $resultsIdentities) && !empty($pk)) {
$resultsIdentities[] = $pk;
}
// Mark row as loaded
$entity->loaded(true);
}
// Ensure set is closed
$stmt->closeCursor();
return new $this->_collectionClass($results, $resultsIdentities);
} else {
return array();
//throw new $this->_exceptionClass(__METHOD__ . " expected PDOStatement object");
}
}
/**
* Find records with given conditions
* If all parameters are empty, find all records
*
* @param array $conditions Array of conditions in column => value pairs
*/
public function all(array $conditions = array())
{
return $this->select()->where($conditions);
}
/**
* Find first record matching given conditions
*
* @param array $conditions Array of conditions in column => value pairs
*/
public function first(array $conditions = array())
{
$query = $this->select()->where($conditions)->limit(1);
$entitys = $this->adapterRead()->read($query);
if($entitys) {
return $entitys->first();
} else {
return false;
}
}
/**
* Find records with custom SQL query
*
* @param string $sql SQL query to execute
* @param array $binds Array of bound parameters to use as values for query
* @throws phpDataMapper_Exception
*/
public function query($sql, array $binds = array())
{
// Add query to log
self::logQuery($sql, $binds);
// Prepare and execute query
if($stmt = $this->adapter()->prepare($sql)) {
$results = $stmt->execute($binds);
if($results) {
$r = $this->getResultSet($stmt);
} else {
$r = false;
}
return $r;
} else {
throw new $this->_exceptionClass(__METHOD__ . " Error: Unable to execute SQL query - failed to create prepared statement from given SQL");
}
}
/** dieng test query **/
public function querytwo($sql, array $binds = array())
{
// Add query to log
self::logQuery($sql, $binds);
// Prepare and execute query
if($stmt = $this->adapter()->prepare($sql)) {
$results = $stmt->execute($binds);
return $results;
} else {
throw new $this->_exceptionClass(__METHOD__ . " Error: Unable to execute SQL query - failed to create prepared statement from given SQL");
}
}
/** end test query **/
/**
* Begin a new database query - get query builder
* Acts as a kind of factory to get the current adapter's query builder object
*
* @param mixed $fields String for single field or array of fields
*/
public function select($fields = "*")
{
$query = new $this->_queryClass($this);
$query->select($fields, $this->datasource());
return $query;
}
/**
* Save related rows of data
*/
protected function saveRelatedRowsFor($entity, array $fillData = array())
{
$relationColumns = $this->getRelationsFor($entity);
foreach($entity->toArray() as $field => $value) {
if($relationColumns && array_key_exists($field, $relationColumns) && (is_array($value) || is_object($value))) {
foreach($value as $relatedRow) {
// Determine relation object
if($value instanceof phpDataMapper_Relation) {
$relatedObj = $value;
} else {
$relatedObj = $relationColumns[$field];
}
$relatedMapper = $relatedObj->mapper();
// Row object
if($relatedRow instanceof phpDataMapper_Entity) {
$relatedRowObj = $relatedRow;
// Associative array
} elseif(is_array($relatedRow)) {
$relatedRowObj = new $this->_entityClass($relatedRow);
}
// Set column values on row only if other data has been updated (prevents queries for unchanged existing rows)
if(count($relatedRowObj->dataModified()) > 0) {
$fillData = array_merge($relatedObj->foreignKeys(), $fillData);
$relatedRowObj->data($fillData);
}
// Save related row
$relatedMapper->save($relatedRowObj);
}
}
}
}
/**
* Save record
* Will update if primary key found, insert if not
* Performs validation automatically before saving record
*
* @param mixed $entity Entity object or array of field => value pairs
*/
public function save($entity)
{
if(is_array($entity)) {
$entity = $this->get()->data($entity);
}
if(!($entity instanceof phpDataMapper_Entity)) {
throw new $this->_exceptionClass(__METHOD__ . " first argument must be entity object or array");
}
// Run validation
if($this->validate($entity)) {
$pk = $this->primaryKey($entity);
// No primary key, insert
if(empty($pk)) {
$result = $this->insert($entity);
// Has primary key, update
} else {
$result = $this->update($entity);
}
} else {
$result = false;
}
return $result;
}
/**
* Insert record
*
* @param mixed $entity Entity object or array of field => value pairs
*/
public function insert($entity)
{
if(is_array($entity)) {
$entity = $this->get()->data($entity);
}
if(!($entity instanceof phpDataMapper_Entity)) {
throw new $this->_exceptionClass(__METHOD__ . " first argument must be entity object or array");
}
$data = array();
$entityData = $entity->toArray();
foreach($entityData as $field => $value) {
if($this->fieldExists($field)) {
// Empty values will be NULL (easier to be handled by databases)
$data[$field] = $this->isEmpty($value) ? null : $value;
}
}
// Ensure there is actually data to update
if(count($data) > 0) {
$result = $this->adapter()->create($this->datasource(), $data);
// Update primary key on row
$pkField = $this->primaryKeyField();
$entity->$pkField = $result;
// Load relations for this row so they can be used immediately
$relations = $this->getRelationsFor($entity);
if($relations && is_array($relations) && count($relations) > 0) {
foreach($relations as $relationCol => $relationObj) {
$entity->$relationCol = $relationObj;
}
}
} else {
$result = false;
}
// Save related rows
if($result) {
$this->saveRelatedRowsFor($entity);
}
return $result;
}
/**
* Update given row object
*/
public function update(phpDataMapper_Entity $entity)
{
// Ensure fields exist to prevent errors
$binds = array();
foreach($entity->dataModified() as $field => $value) {
if($this->fieldExists($field)) {
// Empty values will be NULL (easier to be handled by databases)
$binds[$field] = $this->isEmpty($value) ? null : $value;
}
}
// Handle with adapter
if(count($binds) > 0) {
$result = $this->adapter()->update($this->datasource(), $binds, array($this->primaryKeyField() => $this->primaryKey($entity)));
} else {
$result = true;
}
// Save related rows
if($result) {
$this->saveRelatedRowsFor($entity);
}
return $result;
}
/**
* Delete items matching given conditions
*
* @param mixed $conditions Array of conditions in column => value pairs or Entity object
*/
public function delete($conditions)
{
if($conditions instanceof phpDataMapper_Entity) {
$conditions = array(
0 => array('conditions' => array($this->primaryKeyField() => $this->primaryKey($conditions)))
);
}
if(is_array($conditions)) {
return $this->adapter()->delete($this->datasource(), $conditions);
} else {
throw new $this->_exceptionClass(__METHOD__ . " conditions must be entity object or array, given " . gettype($conditions) . "");
}
}
/**
* Truncate data source
* Should delete all rows and reset serial/auto_increment keys to 0
*/
public function truncateDatasource() {
return $this->adapter()->truncateDatasource($this->datasource());
}
/**
* Drop/delete data source
* Destructive and dangerous - drops entire data source and all data
*/
public function dropDatasource() {
return $this->adapter()->dropDatasource($this->datasource());
}
/**
* Run set validation rules on fields
*
* @todo A LOT more to do here... More validation, break up into classes with rules, etc.
*/
public function validate(phpDataMapper_Entity $entity)
{
// Check validation rules on each feild
foreach($this->fields() as $field => $fieldAttrs) {
if(isset($fieldAttrs['required']) && true === $fieldAttrs['required']) {
// Required field
if(empty($entity->$field)) {
$this->error($field, "Required field '" . $field . "' was left blank");
}
}
}
// Check for errors
if($this->hasErrors()) {
return false;
} else {
return true;
}
}
/**
* Migrate table structure changes from model to database
*/
public function migrate()
{
return $this->adapter()->migrate($this->datasource(), $this->fields());
}
/**
* Check if a value is empty, excluding 0 (annoying PHP issue)
*
* @param mixed $value
* @return boolean
*/
public function isEmpty($value)
{
return (empty($value) && 0 !== $value && '0' !== $value);
}
/**
* Check if any errors exist
*
* @param string $field OPTIONAL field name
* @return boolean
*/
public function hasErrors($field = null)
{
if(null !== $field) {
return isset($this->_errors[$field]) ? count($this->_errors[$field]) : false;
}
return count($this->_errors);
}
/**
* Get array of error messages
*
* @return array
*/
public function errors($msgs = null)
{
// Return errors for given field
if(is_string($msgs)) {
return isset($this->_errors[$field]) ? $this->_errors[$field] : array();
// Set error messages from given array
} elseif(is_array($msgs)) {
foreach($msgs as $field => $msg) {
$this->error($field, $msg);
}
}
return $this->_errors;
}
/**
* Add an error to error messages array
*
* @param string $field Field name that error message relates to
* @param mixed $msg Error message text - String or array of messages
*/
public function error($field, $msg)
{
if(is_array($msg)) {
// Add array of error messages about field
foreach($msg as $msgx) {
$this->_errors[$field][] = $msgx;
}
} else {
// Add to error array
$this->_errors[$field][] = $msg;
}
}
/**
* Attempt to load class file based on phpDataMapper naming conventions
*/
public static function loadClass($className)
{
$loaded = false;
// If class has already been defined, skip loading
if(class_exists($className, false)) {
$loaded = true;
} else {
// Require phpDataMapper_* files by assumed folder structure (naming convention)
if(strpos($className, "phpDataMapper") !== false) {
$classFile = str_replace("_", "/", $className);
$loaded = require_once(dirname(dirname(__FILE__)) . "/" . $classFile . ".php");
}
}
// Ensure required class was loaded
/*
if(!$loaded) {
throw new Exception(__METHOD__ . " Failed: Unable to load class '" . $className . "'!");
}
*/
return $loaded;
}
/**
* Prints all executed SQL queries - useful for debugging
*/
public function debug($entity = null)
{
echo "<p>Executed " . $this->queryCount() . " queries:</p>";
echo "<pre>\n";
print_r(self::$_queryLog);
echo "</pre>\n";
}
/**
* Get count of all queries that have been executed
*
* @return int
*/
public function queryCount()
{
return count(self::$_queryLog);
}
/**
* Log query
*
* @param string $sql
* @param array $data
*/
public static function logQuery($sql, $data = null)
{
self::$_queryLog[] = array(
'query' => $sql,
'data' => $data
);
}
} |
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