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<div class="section" id="whoosh-0-3-release-notes">
<h1>Whoosh 0.3 release notes<a class="headerlink" href="#whoosh-0-3-release-notes" title="Permalink to this headline">ΒΆ</a></h1>
<ul>
<li><p class="first">Major improvements to reading/writing of postings and query performance.</p>
</li>
<li><p class="first">Changed default post limit (run size) from 4 MB to 32 MB.</p>
</li>
<li><p class="first">Finished migrating backend-specific code into <tt class="docutils literal"><span class="pre">whoosh.filedb</span></tt> package.</p>
</li>
<li><p class="first">Moved formats from whoosh.fields module into new whoosh.formats module.</p>
</li>
<li><p class="first">DocReader and TermReader classes combined into new IndexReader interface.
You can get an IndexReader implementation by calling Index.reader().
Searcher is now a wrapper around an IndexReader.</p>
</li>
<li><p class="first">Range query object changed, with new signature and new syntax in the default
query parser. Now you can use <tt class="docutils literal"><span class="pre">[start</span> <span class="pre">TO</span> <span class="pre">end]</span></tt> in the query parser for an
inclusive range, and <tt class="docutils literal"><span class="pre">{start</span> <span class="pre">TO</span> <span class="pre">end}</span></tt> for an exclusive range. You can also
mix the delimiters, for example <tt class="docutils literal"><span class="pre">[start</span> <span class="pre">TO</span> <span class="pre">end}</span></tt> for a range with an
inclusive start but exclusive end term.</p>
</li>
<li><p class="first">Added experimental DATETIME field type lets you pass a
<tt class="docutils literal"><span class="pre">datetime.datetime</span></tt> object as a field value to <tt class="docutils literal"><span class="pre">add_document</span></tt>:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">whoosh.fields</span> <span class="kn">import</span> <span class="n">Schema</span><span class="p">,</span> <span class="n">ID</span><span class="p">,</span> <span class="n">DATETIME</span>
<span class="kn">from</span> <span class="nn">whoosh.filedb.filestore</span> <span class="kn">import</span> <span class="n">RamStorage</span>
<span class="kn">from</span> <span class="nn">datetime</span> <span class="kn">import</span> <span class="n">datetime</span>
<span class="n">schema</span> <span class="o">=</span> <span class="n">Schema</span><span class="p">(</span><span class="nb">id</span><span class="o">=</span><span class="n">ID</span><span class="p">,</span> <span class="n">date</span><span class="o">=</span><span class="n">DATETIME</span><span class="p">)</span>
<span class="n">storage</span> <span class="o">=</span> <span class="n">RamStorage</span><span class="p">()</span>
<span class="n">ix</span> <span class="o">=</span> <span class="n">storage</span><span class="o">.</span><span class="n">create_index</span><span class="p">(</span><span class="n">schema</span><span class="p">)</span>
<span class="n">w</span> <span class="o">=</span> <span class="n">ix</span><span class="o">.</span><span class="n">writer</span><span class="p">()</span>
<span class="n">w</span><span class="o">.</span><span class="n">add_document</span><span class="p">(</span><span class="nb">id</span><span class="o">=</span><span class="s">u"A"</span><span class="p">,</span> <span class="n">date</span><span class="o">=</span><span class="n">datetime</span><span class="o">.</span><span class="n">now</span><span class="p">())</span>
<span class="n">w</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
</pre></div>
</div>
<p>Internally, the DATETIME field indexes the datetime object as text using
the format (4 digit year + 2 digit month + 2 digit day + ‘T’ + 2 digit hour +
2 digit minute + 2 digit second + 6 digit microsecond), for example
<tt class="docutils literal"><span class="pre">20090817T160203109000</span></tt>.</p>
</li>
<li><p class="first">The default query parser now lets you use quoted strings in prefix and range
queries, e.g. <tt class="docutils literal"><span class="pre">["2009-05"</span> <span class="pre">TO</span> <span class="pre">"2009-12"]</span></tt>, <tt class="docutils literal"><span class="pre">"alfa/bravo"*</span></tt>, making it
easier to work with terms containing special characters.</p>
</li>
<li><p class="first"><tt class="docutils literal"><span class="pre">DocReader.vector_as(docnum,</span> <span class="pre">fieldid,</span> <span class="pre">astype)</span></tt> is now
<tt class="docutils literal"><span class="pre">IndexReader.vector_as(astype,</span> <span class="pre">docnum,</span> <span class="pre">fieldid)</span></tt> (i.e. the astype argument
has moved from the last to the first argument), e.g.
<tt class="docutils literal"><span class="pre">v</span> <span class="pre">=</span> <span class="pre">ixreader.vector_as("frequency",</span> <span class="pre">102,</span> <span class="pre">"content")</span></tt>.</p>
</li>
<li><p class="first">Added whoosh.support.charset for translating Sphinx charset table files.</p>
</li>
<li><p class="first">Added whoosh.analysis.CharsetTokenizer and CharsetFilter to enable case and
accent folding.</p>
</li>
<li><p class="first">Added experimental <tt class="docutils literal"><span class="pre">whoosh.ramdb</span></tt> in-memory backend.</p>
</li>
<li><p class="first">Added experimental <tt class="docutils literal"><span class="pre">whoosh.query.FuzzyTerm</span></tt> query type.</p>
</li>
<li><p class="first">Added <tt class="docutils literal"><span class="pre">whoosh.lang.wordnet</span></tt> module containing <tt class="docutils literal"><span class="pre">Thesaurus</span></tt> object for using
WordNet synonym database.</p>
</li>
</ul>
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