illuminate/database 使用 五

发布时间:2023年12月19日

之前文章:

illuminate/database 使用 一-CSDN博客

illuminate/database 使用 二-CSDN博客

illuminate/database 使用 三-CSDN博客

illuminate/database 使用 四-CSDN博客

一、原生查询

1.1 原理

????????根据之前内容调用执行的静态类为Illuminate\Database\Capsule\Manager类。

??????? 根据其源码调用其未定义的静态类,返回的是Illuminate\Database\MySqlConnection类对应的静态类。

??????? 调用顺序Manager->DatabaseManager->ConnectionFactory->MySqlConnection。

??????? Manager通过对象的定义和调用,实现调用DatabaseManager类。

????????ConnectionFactory通过工厂模式调用MySqlConnection。

????????MySqlConnection继承Connection。

????????Connection中可用方法:

  • selectOne($query, $bindings = [], $useReadPdo = true) 查询并返回一行

  • selectFromWriteConnection($query, $bindings = []) 从读库中查询并返回

  • select($query, $bindings = [], $useReadPdo = true) 查询

  • cursor($query, $bindings = [], $useReadPdo = true)

  • insert($query, $bindings = []) 插入数据 返回布尔执行结果

  • update($query, $bindings = []) 修改数据 返回影响行数

  • delete($query, $bindings = []) 删除数据

  • statement($query, $bindings = []) 返回布尔执行结果

  • affectingStatement($query, $bindings = []) 返回结果影响行数

  • unprepared($query) 对PDO连接运行一个未准备的原始查询

1.2 实现代码

function test2()
{
    $sql = "select * from userinfo where id=:id";
    $info = Capsule::select($sql, ['id' => 1]);
    var_dump($info);
    $sql = "select * from userinfo where id in (?) order by id desc";
    $info = Capsule::selectOne($sql, [2, 3]);
    var_dump($info);
    $sql = "insert into userinfo(name,age) values(:name,:age)";
    $row = Capsule::insert($sql, ['name' => 'name', 'age' => 10]);
    var_dump($row);
    $sql = "update userinfo set name=:name where id=:id";
    $row = Capsule::update($sql, ['name' => 'name2', 'id' => 4]);
    var_dump($row);
    $sql = "select * from userinfo where id=:id";
    $info = Capsule::statement($sql, ['id' => 1]);
    var_dump($info);
    $sql = "select * from userinfo where id=:id";
    $info = Capsule::affectingStatement($sql, ['id' => 1]);
    var_dump($info);
    $sql = "insert into userinfo(name,age) values('name1','10')";
    $info = Capsule::unprepared($sql);
    var_dump($info);
    $sql = "delete from userinfo where name='name1'";
    $row = Capsule::delete($sql);
    var_dump($row);
}
test2();

?执行结果:

array(1) {
  [0] =>
  class stdClass#15 (3) {
    public $id =>
    int(1)
    public $name =>
    string(3) "123"
    public $age =>
    int(22)
  }
}
class stdClass#17 (3) {
  public $id =>
  int(2)
  public $name =>
  string(5) "name2"
  public $age =>
  int(13)
}
bool(true)
int(0)
bool(true)
int(1)
bool(true)
int(1)

1.3 源代码

namespace Illuminate\Database\Capsule;
use Illuminate\Container\Container;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Database\Connectors\ConnectionFactory;
use Illuminate\Database\DatabaseManager;
use Illuminate\Database\Eloquent\Model as Eloquent;
use Illuminate\Support\Traits\CapsuleManagerTrait;
use PDO;

class Manager
{
    /**
     * Dynamically pass methods to the default connection.
     *
     * @param  string  $method
     * @param  array  $parameters
     * @return mixed
     */
    public static function __callStatic($method, $parameters)
    {
        return static::connection()->$method(...$parameters);
    }
    /**
     * Get a connection instance from the global manager.
     *
     * @param  string|null  $connection
     * @return \Illuminate\Database\Connection
     */
    public static function connection($connection = null)
    {
        return static::$instance->getConnection($connection);
    }
     /**
     * Get a registered connection instance.
     *
     * @param  string|null  $name
     * @return \Illuminate\Database\Connection
     */
    public function getConnection($name = null)
    {
        return $this->manager->connection($name);
    }
    
    /**
     * Create a new database capsule manager.
     *
     * @param  \Illuminate\Container\Container|null  $container
     * @return void
     */
    public function __construct(Container $container = null)
    {
        $this->setupContainer($container ?: new Container);

        // Once we have the container setup, we will setup the default configuration
        // options in the container "config" binding. This will make the database
        // manager work correctly out of the box without extreme configuration.
        $this->setupDefaultConfiguration();

        $this->setupManager();
    }
    /**
     * Build the database manager instance.
     *
     * @return void
     */
    protected function setupManager()
    {
        $factory = new ConnectionFactory($this->container);

        $this->manager = new DatabaseManager($this->container, $factory);
    }
}
namespace Illuminate\Database;use Doctrine\DBAL\Types\Type;
use Illuminate\Database\Connectors\ConnectionFactory;
use Illuminate\Support\Arr;
use Illuminate\Support\ConfigurationUrlParser;
use Illuminate\Support\Str;
use InvalidArgumentException;
use PDO;
use RuntimeException;

class DatabaseManager implements ConnectionResolverInterface
{
    /**
     * Create a new database manager instance.
     *
     * @param  \Illuminate\Contracts\Foundation\Application  $app
     * @param  \Illuminate\Database\Connectors\ConnectionFactory  $factory
     * @return void
     */
    public function __construct($app, ConnectionFactory $factory)
    {
        $this->app = $app;
        $this->factory = $factory;

        $this->reconnector = function ($connection) {
            $this->reconnect($connection->getNameWithReadWriteType());
        };
    }
     /**
     * Reconnect to the given database.
     *
     * @param  string|null  $name
     * @return \Illuminate\Database\Connection
     */
    public function reconnect($name = null)
    {
        $this->disconnect($name = $name ?: $this->getDefaultConnection());

        if (!isset($this->connections[$name])) {
            return $this->connection($name);
        }

        return $this->refreshPdoConnections($name);
    }
    /**
     * Get a database connection instance.
     *
     * @param  string|null  $name
     * @return \Illuminate\Database\Connection
     */
    public function connection($name = null)
    {
        [$database, $type] = $this->parseConnectionName($name);

        $name = $name ?: $database;

        // If we haven't created this connection, we'll create it based on the config
        // provided in the application. Once we've created the connections we will
        // set the "fetch mode" for PDO which determines the query return types.
        if (!isset($this->connections[$name])) {
            $this->connections[$name] = $this->configure(
                $this->makeConnection($database), $type
            );
        }

        return $this->connections[$name];
    }
    /**
     * Make the database connection instance.
     *
     * @param  string  $name
     * @return \Illuminate\Database\Connection
     */
    protected function makeConnection($name)
    {
        $config = $this->configuration($name);

        // First we will check by the connection name to see if an extension has been
        // registered specifically for that connection. If it has we will call the
        // Closure and pass it the config allowing it to resolve the connection.
        if (isset($this->extensions[$name])) {
            return call_user_func($this->extensions[$name], $config, $name);
        }

        // Next we will check to see if an extension has been registered for a driver
        // and will call the Closure if so, which allows us to have a more generic
        // resolver for the drivers themselves which applies to all connections.
        if (isset($this->extensions[$driver = $config['driver']])) {
            return call_user_func($this->extensions[$driver], $config, $name);
        }

        return $this->factory->make($config, $name);
    }
}
namespace Illuminate\Database\Connectors;

use Illuminate\Contracts\Container\Container;
use Illuminate\Database\Connection;
use Illuminate\Database\MySqlConnection;
use Illuminate\Database\PostgresConnection;
use Illuminate\Database\SQLiteConnection;
use Illuminate\Database\SqlServerConnection;
use Illuminate\Support\Arr;
use InvalidArgumentException;
use PDOException;

class ConnectionFactory
{
    /**
     * Establish a PDO connection based on the configuration.
     *
     * @param  array  $config
     * @param  string|null  $name
     * @return \Illuminate\Database\Connection
     */
    public function make(array $config, $name = null)
    {
        $config = $this->parseConfig($config, $name);

        if (isset($config['read'])) {
            return $this->createReadWriteConnection($config);
        }

        return $this->createSingleConnection($config);
    }
    /**
     * Create a single database connection instance.
     *
     * @param  array  $config
     * @return \Illuminate\Database\Connection
     */
    protected function createSingleConnection(array $config)
    {
        $pdo = $this->createPdoResolver($config);

        return $this->createConnection(
            $config['driver'], $pdo, $config['database'], $config['prefix'], $config
        );
    }
     /**
     * Create a new connection instance.
     *
     * @param  string  $driver
     * @param  \PDO|\Closure  $connection
     * @param  string  $database
     * @param  string  $prefix
     * @param  array  $config
     * @return \Illuminate\Database\Connection
     *
     * @throws \InvalidArgumentException
     */
    protected function createConnection($driver, $connection, $database, $prefix = '', array $config = [])
    {
        if ($resolver = Connection::getResolver($driver)) {
            return $resolver($connection, $database, $prefix, $config);
        }

        switch ($driver) {
            case 'mysql':
                return new MySqlConnection($connection, $database, $prefix, $config);
            case 'pgsql':
                return new PostgresConnection($connection, $database, $prefix, $config);
            case 'sqlite':
                return new SQLiteConnection($connection, $database, $prefix, $config);
            case 'sqlsrv':
                return new SqlServerConnection($connection, $database, $prefix, $config);
        }

        throw new InvalidArgumentException("Unsupported driver [{$driver}].");
    }
}
namespace Illuminate\Database;

use Doctrine\DBAL\Driver\PDOMySql\Driver as DoctrineDriver;
use Doctrine\DBAL\Version;
use Illuminate\Database\PDO\MySqlDriver;
use Illuminate\Database\Query\Grammars\MySqlGrammar as QueryGrammar;
use Illuminate\Database\Query\Processors\MySqlProcessor;
use Illuminate\Database\Schema\Grammars\MySqlGrammar as SchemaGrammar;
use Illuminate\Database\Schema\MySqlBuilder;
use Illuminate\Database\Schema\MySqlSchemaState;
use Illuminate\Filesystem\Filesystem;
use PDO;

class MySqlConnection extends Connection
{

}

?

namespace Illuminate\Database;

use Closure;
use DateTimeInterface;
use Doctrine\DBAL\Connection as DoctrineConnection;
use Doctrine\DBAL\Types\Type;
use Exception;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Database\Events\QueryExecuted;
use Illuminate\Database\Events\StatementPrepared;
use Illuminate\Database\Events\TransactionBeginning;
use Illuminate\Database\Events\TransactionCommitted;
use Illuminate\Database\Events\TransactionRolledBack;
use Illuminate\Database\Query\Builder as QueryBuilder;
use Illuminate\Database\Query\Expression;
use Illuminate\Database\Query\Grammars\Grammar as QueryGrammar;
use Illuminate\Database\Query\Processors\Processor;
use Illuminate\Database\Schema\Builder as SchemaBuilder;
use Illuminate\Support\Arr;
use LogicException;
use PDO;
use PDOStatement;
use RuntimeException;

class Connection implements ConnectionInterface
{
     /**
     * Get a new query builder instance.
     *
     * @return \Illuminate\Database\Query\Builder
     */
    public function query()
    {
        return new QueryBuilder(
            $this, $this->getQueryGrammar(), $this->getPostProcessor()
        );
    }
    /**
     * Run a select statement against the database.
     *
     * @param  string  $query
     * @param  array  $bindings
     * @param  bool  $useReadPdo
     * @return array
     */
    public function select($query, $bindings = [], $useReadPdo = true)
    {
        return $this->run($query, $bindings, function ($query, $bindings) use ($useReadPdo) {
            if ($this->pretending()) {
                return [];
            }

            // For select statements, we'll simply execute the query and return an array
            // of the database result set. Each element in the array will be a single
            // row from the database table, and will either be an array or objects.
            $statement = $this->prepared(
                $this->getPdoForSelect($useReadPdo)->prepare($query)
            );

            $this->bindValues($statement, $this->prepareBindings($bindings));

            $statement->execute();

            return $statement->fetchAll();
        });
    }
    /**
     * Run an insert statement against the database.
     *
     * @param  string  $query
     * @param  array  $bindings
     * @return bool
     */
    public function insert($query, $bindings = [])
    {
        return $this->statement($query, $bindings);
    }
     /**
     * Run an update statement against the database.
     *
     * @param  string  $query
     * @param  array  $bindings
     * @return int
     */
    public function update($query, $bindings = [])
    {
        return $this->affectingStatement($query, $bindings);
    }
    /**
     * Run a delete statement against the database.
     *
     * @param  string  $query
     * @param  array  $bindings
     * @return int
     */
    public function delete($query, $bindings = [])
    {
        return $this->affectingStatement($query, $bindings);
    }
     /**
     * Run a raw, unprepared query against the PDO connection.
     *
     * @param  string  $query
     * @return bool
     */
    public function unprepared($query)
    {
        return $this->run($query, [], function ($query) {
            if ($this->pretending()) {
                return true;
            }

            $this->recordsHaveBeenModified(
                $change = $this->getPdo()->exec($query) !== false
            );

            return $change;
        });
    }
    /**
     * Execute the given callback in "dry run" mode.
     *
     * @param  \Closure  $callback
     * @return array
     */
    public function pretend(Closure $callback)
    {
        return $this->withFreshQueryLog(function () use ($callback) {
            $this->pretending = true;

            // Basically to make the database connection "pretend", we will just return
            // the default values for all the query methods, then we will return an
            // array of queries that were "executed" within the Closure callback.
            $callback($this);

            $this->pretending = false;

            return $this->queryLog;
        });
    }
    /**
     * Execute an SQL statement and return the boolean result.
     *
     * @param  string  $query
     * @param  array  $bindings
     * @return bool
     */
    public function statement($query, $bindings = [])
    {
        return $this->run($query, $bindings, function ($query, $bindings) {
            if ($this->pretending()) {
                return true;
            }

            $statement = $this->getPdo()->prepare($query);

            $this->bindValues($statement, $this->prepareBindings($bindings));

            $this->recordsHaveBeenModified();

            return $statement->execute();
        });
    }
}

二、 sql输出

2.1 原理

?????? Illuminate\Database\MySqlConnection类包含变量queryLog,获取对应执行语句实际上就是获取queryLog。根据源码每次执行sql语句,都使用该类run()函数执行,run()中包括logQuery()函数。而logQuery函数就是对queryLog变量进行设置。

??????? 返回的queryLog变量值,顺序和执行顺序相同,所以取左后一条就是最新执行的sql。

??????? 框架中默认记录不记录queryLog。

2.2 实现代码

function test3()
{
    Capsule::enableQueryLog();
    $sql = "select * from userinfo where id=:id";
    $info = Capsule::select($sql, ['id' => 1]);
    $sql = "select * from userinfo where id in (?) order by id desc";
    $info = Capsule::selectOne($sql, [2, 3]);
    $logs = Capsule::getQueryLog();
    var_dump($logs);
    var_dump(end($logs));
}
test3();

?执行结果

array(2) {
  [0] =>
  array(3) {
    'query' =>
    string(35) "select * from userinfo where id=:id"
    'bindings' =>
    array(1) {
      'id' =>
      int(1)
    }
    'time' =>
    double(7.35)
  }
  [1] =>
  array(3) {
    'query' =>
    string(55) "select * from userinfo where id in (?) order by id desc"
    'bindings' =>
    array(2) {
      [0] =>
      int(2)
      [1] =>
      int(3)
    }
    'time' =>
    double(0.33)
  }
}
array(3) {
  'query' =>
  string(55) "select * from userinfo where id in (?) order by id desc"
  'bindings' =>
  array(2) {
    [0] =>
    int(2)
    [1] =>
    int(3)
  }
  'time' =>
  double(0.33)
}

说实话,输出结果和想的不太一样。我还是希望传回拼接后的语句,当然传$sql的时候就可以传拼接后的sql语句。

因为需要打印sql大概有两种情况

  1. 调试sql,对于使用复杂sql时很实用。
  2. 调试数据导致的bug。实际运行,bug情况很多,有些是数据导致,查看对应业务的sql执行有时候能快速发现问题。

2.3 源码

class Connection implements ConnectionInterface
{
    /**
     * All of the queries run against the connection.
     *
     * @var array
     */
    protected $queryLog = [];
    /**
     * Indicates whether queries are being logged.
     *
     * @var bool
     */
    protected $loggingQueries = false;

    /**
     * Enable the query log on the connection.
     *
     * @return void
     */
    public function enableQueryLog()
    {
        $this->loggingQueries = true;
    }
    /**
     * Disable the query log on the connection.
     *
     * @return void
     */
    public function disableQueryLog()
    {
        $this->loggingQueries = false;
    }
    /**
     * Log a query in the connection's query log.
     *
     * @param  string  $query
     * @param  array  $bindings
     * @param  float|null  $time
     * @return void
     */
    public function logQuery($query, $bindings, $time = null)
    {
        $this->event(new QueryExecuted($query, $bindings, $time, $this));

        if ($this->loggingQueries) {
            $this->queryLog[] = compact('query', 'bindings', 'time');
        }
    }
    /**
     * Run a SQL statement and log its execution context.
     *
     * @param  string  $query
     * @param  array  $bindings
     * @param  \Closure  $callback
     * @return mixed
     *
     * @throws \Illuminate\Database\QueryException
     */
    protected function run($query, $bindings, Closure $callback)
    {
        foreach ($this->beforeExecutingCallbacks as $beforeExecutingCallback) {
            $beforeExecutingCallback($query, $bindings, $this);
        }

        $this->reconnectIfMissingConnection();

        $start = microtime(true);

        // Here we will run this query. If an exception occurs we'll determine if it was
        // caused by a connection that has been lost. If that is the cause, we'll try
        // to re-establish connection and re-run the query with a fresh connection.
        try {
            $result = $this->runQueryCallback($query, $bindings, $callback);
        } catch (QueryException $e) {
            $result = $this->handleQueryException(
                $e, $query, $bindings, $callback
            );
        }

        // Once we have run the query we will calculate the time that it took to run and
        // then log the query, bindings, and execution time so we will report them on
        // the event that the developer needs them. We'll log time in milliseconds.
        $this->logQuery(
            $query, $bindings, $this->getElapsedTime($start)
        );

        return $result;
    }
     /**
     * Run a raw, unprepared query against the PDO connection.
     *
     * @param  string  $query
     * @return bool
     */
    public function unprepared($query)
    {
        return $this->run($query, [], function ($query) {
            if ($this->pretending()) {
                return true;
            }

            $this->recordsHaveBeenModified(
                $change = $this->getPdo()->exec($query) !== false
            );

            return $change;
        });
    }
}

文章来源:https://blog.csdn.net/lsswear/article/details/135033087
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