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331 lines
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HTML
331 lines
10 KiB
HTML
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<title>DB::BeginTransaction - 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/Any" data-name="db::any">
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<li class=" current" 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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<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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<a href="../DB/QueryMethods.html">QueryMethods</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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<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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<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>
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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>
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<li class=" " 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">module</span> DB::BeginTransaction
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</h1>
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<h2>Direct including types</h2>
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<ul class="other-types-list">
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<li class="other-type"><a href="../DB/Connection.html">DB::Connection</a></li>
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<li class="other-type"><a href="../DB/Transaction.html">DB::Transaction</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/7d30e9f50e478cb6404d16d2ce91e639b6f9c476/src/db/begin_transaction.cr#L2" target="_blank">db/begin_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="#begin_transaction%3ATransaction-instance-method" class="signature"><strong>#begin_transaction</strong> : Transaction</a>
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<div class="summary"><p>Creates a transaction from the current context.</p></div>
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</li>
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<li class="entry-summary">
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<a href="#transaction%28%26block%29-instance-method" class="signature"><strong>#transaction</strong>(&block)</a>
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<div class="summary"><p>yields a transaction from the current context.</p></div>
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</li>
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</ul>
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<div class="methods-inherited">
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</div>
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<h2>Instance Method Detail</h2>
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<div class="entry-detail" id="begin_transaction:Transaction-instance-method">
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<div class="signature">
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abstract
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def <strong>begin_transaction</strong> : <a href="../DB/Transaction.html">Transaction</a>
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<a class="method-permalink" href="#begin_transaction%3ATransaction-instance-method">#</a>
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</div>
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<div class="doc"><p>Creates a transaction from the current context.
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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>
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are called explictly to release the context.</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/7d30e9f50e478cb6404d16d2ce91e639b6f9c476/src/db/begin_transaction.cr#L6" target="_blank">View source</a>]
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</div>
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</div>
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<div class="entry-detail" id="transaction(&block)-instance-method">
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<div class="signature">
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def <strong>transaction</strong>(&block)
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<a class="method-permalink" href="#transaction%28%26block%29-instance-method">#</a>
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</div>
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<div class="doc"><p>yields a transaction from the current context.
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Query the database through <code><a href="../DB/Transaction.html#connection%3AConnection-instance-method">Transaction#connection</a></code> object.
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If an exception is thrown within the block a rollback is performed.
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The exception thrown is blubbled unless it is a <code><a href="../DB/Rollback.html">DB::Rollback</a></code>.
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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>
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can be called explicitly.</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/7d30e9f50e478cb6404d16d2ce91e639b6f9c476/src/db/begin_transaction.cr#L14" target="_blank">View source</a>]
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</div>
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</div>
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