laravel5.1框架model类查询的实现方法

public static function __callStatic($method, $parameters){  $instance = new static; //这里的$instance就是User类的实例对象  return call_user_func_array([$instance, $method], $parameters);}

public function __call($method, $parameters){  if (in_array($method, ['increment', 'decrement'])) {    return call_user_func_array([$this, $method], $parameters);  }  $query = $this->newQuery(); //返回Illuminate/Database/Eloquent/Builder对象  return call_user_func_array([$query, $method], $parameters);}

/** * Run the query as a "select" statement against the connection. * * @return array */protected function runSelect(){  return $this->connection->select($this->toSql(), $this->getBindings(), ! $this->useWritePdo); //调用connection 对象的select方法}

/** * Get a new query builder for the model's table. * * @return /Illuminate/Database/Eloquent/Builder */public function newQuery(){  $builder = $this->newQueryWithoutScopes();  return $this->applyGlobalScopes($builder);}

/** * Get a new query builder that doesn't have any global scopes. * * @return /Illuminate/Database/Eloquent/Builder|static */public function newQueryWithoutScopes(){  $builder = $this->newEloquentBuilder(    $this->newBaseQueryBuilder() //这个方法返回  );  // Once we have the query builders, we will set the model instances so the  // builder can easily access any information it may need from the model  // while it is constructing and executing various queries against it.  return $builder->setModel($this)->with($this->with);}

/** * Get a new query builder instance for the connection. * * @return /Illuminate/Database/Query/Builder */protected function newBaseQueryBuilder(){  $conn = $this->getConnection(); //连接数据库并返回connection对象  $grammar = $conn->getQueryGrammar();  return new QueryBuilder($conn, $grammar, $conn->getPostProcessor()); //Illuminate/Database/Query/Builder}

/** * Create a single database connection instance. * * @param array $config * @return /Illuminate/Database/Connection */protected function createSingleConnection(array $config){  //创建连接器对象并连接数据库返回pdo对象  $pdo = $this->createConnector($config)->connect($config);  //传入PDO对象、并返回connection对象，connection对象负责查询数据库  return $this->createConnection($config['driver'], $pdo, $config['database'], $config['prefix'], $config); }