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<title>DB::Transaction - github.com/crystal-lang/crystal-db</title>
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<a href="../DB.html">DB</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/BeginTransaction" data-name="db::begintransaction">
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<a href="../DB/BeginTransaction.html">BeginTransaction</a>
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<a href="../DB/ExecResult.html">ExecResult</a>
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<a href="../DB/Mappable.html">Mappable</a>
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<a href="../DB/MappingException.html">MappingException</a>
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<li class="parent " data-id="github.com/crystal-lang/crystal-db/DB/Pool" data-name="db::pool(t)">
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<a href="../DB/Pool.html">Pool</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolPreparedStatement" data-name="db::poolpreparedstatement">
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolStatement" data-name="db::poolstatement">
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<a href="../DB/PoolStatement.html">PoolStatement</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolTimeout" data-name="db::pooltimeout">
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<a href="../DB/PoolTimeout.html">PoolTimeout</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolUnpreparedStatement" data-name="db::poolunpreparedstatement">
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<a href="../DB/PoolUnpreparedStatement.html">PoolUnpreparedStatement</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/QueryMethods" data-name="db::querymethods">
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<a href="../DB/QueryMethods.html">QueryMethods</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/ResultSet" data-name="db::resultset">
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<a href="../DB/ResultSet.html">ResultSet</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Rollback" data-name="db::rollback">
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<a href="../DB/Rollback.html">Rollback</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/SavePointTransaction" data-name="db::savepointtransaction">
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<a href="../DB/SavePointTransaction.html">SavePointTransaction</a>
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<li class="parent " data-id="github.com/crystal-lang/crystal-db/DB/SessionMethods" data-name="db::sessionmethods(session, stmt)">
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<a href="../DB/SessionMethods.html">SessionMethods</a>
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<ul>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/SessionMethods/PreparedQuery" data-name="db::sessionmethods::preparedquery(session, stmt)">
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<a href="../DB/SessionMethods/PreparedQuery.html">PreparedQuery</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/SessionMethods/UnpreparedQuery" data-name="db::sessionmethods::unpreparedquery(session, stmt)">
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<a href="../DB/SessionMethods/UnpreparedQuery.html">UnpreparedQuery</a>
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</ul>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Statement" data-name="db::statement">
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<a href="../DB/Statement.html">Statement</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/StatementMethods" data-name="db::statementmethods">
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<a href="../DB/StatementMethods.html">StatementMethods</a>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/StringKeyCache" data-name="db::stringkeycache(t)">
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<a href="../DB/StringKeyCache.html">StringKeyCache</a>
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</li>
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<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/TopLevelTransaction" data-name="db::topleveltransaction">
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<a href="../DB/TopLevelTransaction.html">TopLevelTransaction</a>
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<li class=" current" data-id="github.com/crystal-lang/crystal-db/DB/Transaction" data-name="db::transaction">
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<a href="../DB/Transaction.html">Transaction</a>
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</li>
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</ul>
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</li>
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</ul>
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</div>
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<div id="main-content">
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<h1 class="type-name">
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<span class="kind">abstract class</span> DB::Transaction
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</h1>
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<ul class="superclass-hierarchy"><li class="superclass"><a href="../DB/Transaction.html">DB::Transaction</a></li><li class="superclass">Reference</li><li class="superclass">Object</li></ul>
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<h2>Overview</h2>
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<p>Transactions should be started from <code>DB#transaction</code>, <code>Connection#transaction</code>
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or <code><a href="../DB/Connection.html#begin_transaction-instance-method">Connection#begin_transaction</a></code>.</p>
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<p>Use <code><a href="../DB/Transaction.html#connection%3AConnection-instance-method">Transaction#connection</a></code> to submit statements to the database.</p>
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<p>Use <code><a href="../DB/Transaction.html#commit-instance-method">Transaction#commit</a></code> or <code><a href="../DB/Transaction.html#rollback-instance-method">Transaction#rollback</a></code> to close the ongoing transaction
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explicitly. Or refer to <code><a href="../DB/BeginTransaction.html#transaction%28%26block%29-instance-method">BeginTransaction#transaction</a></code> for documentation on how to
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use <code>#transaction(&block)</code> methods in <code><a href="../DB.html">DB</a></code> and <code><a href="../DB/Connection.html">Connection</a></code>.</p>
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<p>Nested transactions are supported by using sql <code>SAVEPOINT</code>. To start a nested
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transaction use <code>Transaction#transaction</code> or <code>Transaction#begin_transaction</code>.</p>
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<h2>Included Modules</h2>
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<ul class="other-types-list">
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<li class="other-type"><a href="../DB/BeginTransaction.html">DB::BeginTransaction</a></li>
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<li class="other-type"><a href="../DB/Disposable.html">DB::Disposable</a></li>
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</ul>
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<h2>Direct Known Subclasses</h2>
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<ul class="other-types-list">
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<li class="other-type"><a href="../DB/SavePointTransaction.html">DB::SavePointTransaction</a></li>
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<li class="other-type"><a href="../DB/TopLevelTransaction.html">DB::TopLevelTransaction</a></li>
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</ul>
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<h2>Defined in:</h2>
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<a href="https://github.com/crystal-lang/crystal-db/blob/912113d7fb377874704fc480d2aa2c1dc386e1fe/src/db/transaction.cr#L14" target="_blank">db/transaction.cr</a>
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<br/>
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<h2>Instance Method Summary</h2>
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<ul class="list-summary">
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<li class="entry-summary">
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<a href="#commit-instance-method" class="signature"><strong>#commit</strong></a>
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<div class="summary"><p>commits the current transaction</p></div>
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</li>
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<li class="entry-summary">
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<a href="#connection%3AConnection-instance-method" class="signature"><strong>#connection</strong> : Connection</a>
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</li>
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<li class="entry-summary">
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<a href="#release_from_nested_transaction-instance-method" class="signature"><strong>#release_from_nested_transaction</strong></a>
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</li>
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<li class="entry-summary">
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<a href="#rollback-instance-method" class="signature"><strong>#rollback</strong></a>
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<div class="summary"><p>rollbacks the current transaction</p></div>
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</li>
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</ul>
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<div class="methods-inherited">
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<h3>Instance methods inherited from module <code><a href="../DB/BeginTransaction.html">DB::BeginTransaction</a></code></h3>
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<a href="../DB/BeginTransaction.html#begin_transaction%3ATransaction-instance-method" class="tooltip">
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<span>begin_transaction : Transaction</span>
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begin_transaction</a>,
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<a href="../DB/BeginTransaction.html#transaction%28%26block%29-instance-method" class="tooltip">
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<span>transaction(&block)</span>
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transaction</a>
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<h3>Instance methods inherited from module <code><a href="../DB/Disposable.html">DB::Disposable</a></code></h3>
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<a href="../DB/Disposable.html#close-instance-method" class="tooltip">
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<span>close</span>
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close</a>,
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<a href="../DB/Disposable.html#closed%3F-instance-method" class="tooltip">
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<span>closed?</span>
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closed?</a>
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</div>
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<h2>Instance Method Detail</h2>
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<div class="entry-detail" id="commit-instance-method">
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<div class="signature">
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def <strong>commit</strong>
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<a class="method-permalink" href="#commit-instance-method">#</a>
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</div>
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<div class="doc"><p>commits the current transaction</p></div>
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<br/>
|
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<div>
|
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[<a href="https://github.com/crystal-lang/crystal-db/blob/912113d7fb377874704fc480d2aa2c1dc386e1fe/src/db/transaction.cr#L21" target="_blank">View source</a>]
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</div>
|
||
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</div>
|
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<div class="entry-detail" id="connection:Connection-instance-method">
|
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<div class="signature">
|
||
|
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abstract
|
||
|
|
def <strong>connection</strong> : <a href="../DB/Connection.html">Connection</a>
|
||
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<a class="method-permalink" href="#connection%3AConnection-instance-method">#</a>
|
||
|
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</div>
|
||
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||
|
|
<br/>
|
||
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|
<div>
|
||
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[<a href="https://github.com/crystal-lang/crystal-db/blob/912113d7fb377874704fc480d2aa2c1dc386e1fe/src/db/transaction.cr#L18" target="_blank">View source</a>]
|
||
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||
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</div>
|
||
|
|
</div>
|
||
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|
||
|
|
<div class="entry-detail" id="release_from_nested_transaction-instance-method">
|
||
|
|
<div class="signature">
|
||
|
|
abstract
|
||
|
|
def <strong>release_from_nested_transaction</strong>
|
||
|
|
|
||
|
|
<a class="method-permalink" href="#release_from_nested_transaction-instance-method">#</a>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<br/>
|
||
|
|
<div>
|
||
|
|
|
||
|
|
[<a href="https://github.com/crystal-lang/crystal-db/blob/912113d7fb377874704fc480d2aa2c1dc386e1fe/src/db/transaction.cr#L35" target="_blank">View source</a>]
|
||
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||
|
|
</div>
|
||
|
|
</div>
|
||
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|
||
|
|
<div class="entry-detail" id="rollback-instance-method">
|
||
|
|
<div class="signature">
|
||
|
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|
||
|
|
def <strong>rollback</strong>
|
||
|
|
|
||
|
|
<a class="method-permalink" href="#rollback-instance-method">#</a>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div class="doc"><p>rollbacks the current transaction</p></div>
|
||
|
|
|
||
|
|
<br/>
|
||
|
|
<div>
|
||
|
|
|
||
|
|
[<a href="https://github.com/crystal-lang/crystal-db/blob/912113d7fb377874704fc480d2aa2c1dc386e1fe/src/db/transaction.cr#L26" target="_blank">View source</a>]
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
|
||
|
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|
||
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|
||
|
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|
||
|
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|
||
|
|
</div>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|