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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>*DB-AUTO-SYNC*</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="CLSQL Users' Guide" /><link rel="up" href="ref-oodml.html" title="Object Oriented Data Manipulation Language (OODML)" /><link rel="prev" href="ref-oodml.html" title="Object Oriented Data Manipulation Language (OODML)" /><link rel="next" href="default-caching.html" title="*DEFAULT-CACHING*" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">*DB-AUTO-SYNC*</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ref-oodml.html">Prev</a> </td><th width="60%" align="center">Object Oriented Data Manipulation Language (OODML)</th><td width="20%" align="right"> <a accesskey="n" href="default-caching.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="db-auto-sync"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>*DB-AUTO-SYNC* — Enables SQL storage during Lisp object creation.<strong>Variable</strong></p></div><div class="refsect1"><a id="idp60491344"></a><h2>Value Type</h2><p>
Boolean
</p></div><div class="refsect1"><a id="idp60492688"></a><h2>Initial Value</h2><p><code class="constant">NIL</code></p></div><div class="refsect1"><a id="idp60494160"></a><h2>Description</h2><p>
When this variable is <code class="constant">T</code> an instance is stored in the SQL
database when the instance is created by
<code class="function">make-instance</code>. Furthermore, the
appropriate database records are updated whenever the slots of
a <a class="glossterm" href="glossary.html#gloss-view-class"><em class="glossterm">View Class</em></a>
instance are modified.
</p><p>
When this variable is <code class="constant">NIL</code>, which is the default value,
<span class="application"><span class="emphasis"><em>CLSQL</em></span></span> behaves like <span class="application">CommonSQL</span>: instances of view classes
are stored or updated in the SQL database only when <a class="link" href="update-records-from-instance.html" title="UPDATE-RECORDS-FROM-INSTANCE"><code class="function">update-record-from-instance</code></a>,
<a class="link" href="update-record-from-slot.html" title="UPDATE-RECORD-FROM-SLOT"><code class="function">update-record-from-slot</code></a>
or <a class="link" href="update-record-from-slots.html" title="UPDATE-RECORD-FROM-SLOTS"><code class="function">update-record-from-slots</code></a>
are called.
</p></div><div class="refsect1"><a id="idp61303104"></a><h2>Examples</h2><pre class="screen">
(let ((instance (make-instance 'foo)))
(update-records-from-instance instance))
;; is equivalent to
(let ((*db-auto-sync* t))
(make-instance 'foo))
;; and
(progn
(setf (slot-value instance 'bar) "baz")
(update-record-from-slot instance 'bar))
;; is equivalent to
(let ((*db-auto-sync* t))
(setf (slot-value instance 'bar) "baz"))
</pre></div><div class="refsect1"><a id="idp61305136"></a><h2>Affected By</h2><p>None.</p></div><div class="refsect1"><a id="idp55864272"></a><h2>See Also</h2><table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="update-records-from-instance.html" title="UPDATE-RECORDS-FROM-INSTANCE"><code class="function">update-records-from-instance</code></a></td></tr><tr><td><a class="link" href="update-record-from-slot.html" title="UPDATE-RECORD-FROM-SLOT"><code class="function">update-record-from-slot</code></a></td></tr><tr><td><a class="link" href="update-record-from-slots.html" title="UPDATE-RECORD-FROM-SLOTS"><code class="function">update-record-from-slots</code></a></td></tr></table></div><div class="refsect1"><a id="idp55869696"></a><h2>Notes</h2><p>This is a CLSQL extension to the CommonSQL API.</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ref-oodml.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ref-oodml.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="default-caching.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Object Oriented Data Manipulation Language (OODML) </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> *DEFAULT-CACHING*</td></tr></table></div></body></html>
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