shard-crystal-db/api/0.4.2/DB/BeginTransaction.html

352 lines
11 KiB
HTML
Raw Normal View History

2017-04-21 20:28:25 +00:00
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta id="repository-name" content="github.com/crystal-lang/crystal-db">
<link href="../css/style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="../js/doc.js"></script>
<title>DB::BeginTransaction - github.com/crystal-lang/crystal-db</title>
</head>
<body>
<div id="types-list">
<div id="search-box">
<input type="search" id="search-input" placeholder="Search...">
</div>
<ul>
<li><a href="../index.html">README</a></li>
</ul>
<ul>
<li class="parent open current" data-id="github.com/crystal-lang/crystal-db/DB" data-name="db">
<a href="../DB.html">DB</a>
<ul>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Any" data-name="db::any">
<a href="../DB/Any.html">Any</a>
</li>
<li class=" current" data-id="github.com/crystal-lang/crystal-db/DB/BeginTransaction" data-name="db::begintransaction">
<a href="../DB/BeginTransaction.html">BeginTransaction</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Connection" data-name="db::connection">
<a href="../DB/Connection.html">Connection</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/ConnectionContext" data-name="db::connectioncontext">
<a href="../DB/ConnectionContext.html">ConnectionContext</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/ConnectionLost" data-name="db::connectionlost">
<a href="../DB/ConnectionLost.html">ConnectionLost</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/ConnectionRefused" data-name="db::connectionrefused">
<a href="../DB/ConnectionRefused.html">ConnectionRefused</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Database" data-name="db::database">
<a href="../DB/Database.html">Database</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Disposable" data-name="db::disposable">
<a href="../DB/Disposable.html">Disposable</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Driver" data-name="db::driver">
<a href="../DB/Driver.html">Driver</a>
</li>
<li class="parent " data-id="github.com/crystal-lang/crystal-db/DB/DriverSpecs" data-name="db::driverspecs(dbanytype)">
<a href="../DB/DriverSpecs.html">DriverSpecs</a>
<ul>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/DriverSpecs/ColumnDef" data-name="db::driverspecs::columndef">
<a href="../DB/DriverSpecs/ColumnDef.html">ColumnDef</a>
</li>
</ul>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Error" data-name="db::error">
<a href="../DB/Error.html">Error</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/ExecResult" data-name="db::execresult">
<a href="../DB/ExecResult.html">ExecResult</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Mappable" data-name="db::mappable">
<a href="../DB/Mappable.html">Mappable</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/MappingException" data-name="db::mappingexception">
<a href="../DB/MappingException.html">MappingException</a>
</li>
<li class="parent " data-id="github.com/crystal-lang/crystal-db/DB/Pool" data-name="db::pool(t)">
<a href="../DB/Pool.html">Pool</a>
<ul>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Pool/TimeoutHelper" data-name="db::pool::timeouthelper">
<a href="../DB/Pool/TimeoutHelper.html">TimeoutHelper</a>
</li>
</ul>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolPreparedStatement" data-name="db::poolpreparedstatement">
<a href="../DB/PoolPreparedStatement.html">PoolPreparedStatement</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolRetryAttemptsExceeded" data-name="db::poolretryattemptsexceeded">
<a href="../DB/PoolRetryAttemptsExceeded.html">PoolRetryAttemptsExceeded</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolStatement" data-name="db::poolstatement">
<a href="../DB/PoolStatement.html">PoolStatement</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolTimeout" data-name="db::pooltimeout">
<a href="../DB/PoolTimeout.html">PoolTimeout</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/PoolUnpreparedStatement" data-name="db::poolunpreparedstatement">
<a href="../DB/PoolUnpreparedStatement.html">PoolUnpreparedStatement</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/QueryMethods" data-name="db::querymethods">
<a href="../DB/QueryMethods.html">QueryMethods</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/ResultSet" data-name="db::resultset">
<a href="../DB/ResultSet.html">ResultSet</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Rollback" data-name="db::rollback">
<a href="../DB/Rollback.html">Rollback</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/SavePointTransaction" data-name="db::savepointtransaction">
<a href="../DB/SavePointTransaction.html">SavePointTransaction</a>
</li>
<li class="parent " data-id="github.com/crystal-lang/crystal-db/DB/SessionMethods" data-name="db::sessionmethods(session, stmt)">
<a href="../DB/SessionMethods.html">SessionMethods</a>
<ul>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/SessionMethods/PreparedQuery" data-name="db::sessionmethods::preparedquery(session, stmt)">
<a href="../DB/SessionMethods/PreparedQuery.html">PreparedQuery</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/SessionMethods/UnpreparedQuery" data-name="db::sessionmethods::unpreparedquery(session, stmt)">
<a href="../DB/SessionMethods/UnpreparedQuery.html">UnpreparedQuery</a>
</li>
</ul>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Statement" data-name="db::statement">
<a href="../DB/Statement.html">Statement</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/StatementMethods" data-name="db::statementmethods">
<a href="../DB/StatementMethods.html">StatementMethods</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/StringKeyCache" data-name="db::stringkeycache(t)">
<a href="../DB/StringKeyCache.html">StringKeyCache</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/TopLevelTransaction" data-name="db::topleveltransaction">
<a href="../DB/TopLevelTransaction.html">TopLevelTransaction</a>
</li>
<li class=" " data-id="github.com/crystal-lang/crystal-db/DB/Transaction" data-name="db::transaction">
<a href="../DB/Transaction.html">Transaction</a>
</li>
</ul>
</li>
</ul>
</div>
<div id="main-content">
<h1 class="type-name">
<span class="kind">module</span> DB::BeginTransaction
</h1>
<h2>Direct including types</h2>
<ul class="other-types-list">
<li class="other-type"><a href="../DB/Connection.html">DB::Connection</a></li>
<li class="other-type"><a href="../DB/Transaction.html">DB::Transaction</a></li>
</ul>
<h2>Defined in:</h2>
<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/begin_transaction.cr#L2" target="_blank">db/begin_transaction.cr</a>
<br/>
<h2>Instance Method Summary</h2>
<ul class="list-summary">
<li class="entry-summary">
<a href="#begin_transaction%3ATransaction-instance-method" class="signature"><strong>#begin_transaction</strong> : Transaction</a>
<div class="summary"><p>Creates a transaction from the current context.</p></div>
</li>
<li class="entry-summary">
<a href="#transaction%28%26block%29-instance-method" class="signature"><strong>#transaction</strong>(&block)</a>
<div class="summary"><p>yields a transaction from the current context.</p></div>
</li>
</ul>
<div class="methods-inherited">
</div>
<h2>Instance Method Detail</h2>
<div class="entry-detail" id="begin_transaction:Transaction-instance-method">
<div class="signature">
abstract
def <strong>begin_transaction</strong> : <a href="../DB/Transaction.html">Transaction</a>
<a class="method-permalink" href="#begin_transaction%3ATransaction-instance-method">#</a>
</div>
<div class="doc"><p>Creates a transaction from the current context.
If is expected that either <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>
are called explictly to release the context.</p></div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/begin_transaction.cr#L6" target="_blank">View source</a>]
</div>
</div>
<div class="entry-detail" id="transaction&#40;&amp;block&#41;-instance-method">
<div class="signature">
def <strong>transaction</strong>(&block)
<a class="method-permalink" href="#transaction%28%26block%29-instance-method">#</a>
</div>
<div class="doc"><p>yields a transaction from the current context.
Query the database through <code><a href="../DB/Transaction.html#connection%3AConnection-instance-method">Transaction#connection</a></code> object.
If an exception is thrown within the block a rollback is performed.
The exception thrown is blubbled unless it is a <code><a href="../DB/Rollback.html">DB::Rollback</a></code>.
From the yielded object <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>
can be called explicitly.</p></div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/begin_transaction.cr#L14" target="_blank">View source</a>]
</div>
</div>
</div>
</body>
</html>