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db
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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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Direct including types
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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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Defined in:
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</h2>
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<a href="https://github.com/crystal-lang/crystal-db/blob/v0.11.0/src/db/begin_transaction.cr#L2" target="_blank">
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db/begin_transaction.cr
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</a>
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<br/>
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<h2>
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Instance Method Summary
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</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%26%3ATransaction-%3ET%29%3AT%3FforallT-instance-method" class="signature"><strong>#transaction</strong>(& : Transaction -> T) : T? forall T</a>
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<div class="summary"><p>yields a transaction from the current context.</p></div>
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<h2>
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Instance Method Detail
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</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">
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<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 explicitly to release the context.</p>
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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/v0.11.0/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(&:Transaction->T):T?forallT-instance-method">
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<div class="signature">
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def <strong>transaction</strong>(& : <a href="../DB/Transaction.html">Transaction</a> -> T) : T? forall T
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<a class="method-permalink" href="#transaction%28%26%3ATransaction-%3ET%29%3AT%3FforallT-instance-method">#</a>
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</div>
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<div class="doc">
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<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 bubbled 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.
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Returns the value of the block.</p>
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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/v0.11.0/src/db/begin_transaction.cr#L15" target="_blank">View source</a>]
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