public ActionResult Search(string query, int? page, string titlesonly)
{
var pageNumber = page ?? 1;
if (pageNumber <= 0)
pageNumber = 1;
var q = new SearchQuery
{
Query = query,
CurrentPage = pageNumber,
TitlesOnly = !string.IsNullOrWhiteSpace(titlesonly),
};
var vm = new SearchResultsViewModel {Query = q, SearchResults = new List<SearchResultsViewModel.SearchResult>(), TotalResults = 0};
try
{
vm = Core.Index.SearchWithSuggestions(q);
}
catch (ParseException ex)
{
ViewBag.ErrorMessage = "Error: " + ex.Message;
}
ViewBag.Query = q;
return View(vm);
}
public static SearchResultsViewModel SearchWithSuggestions(SearchQuery searchQuery, bool suggestOnlyWhenNoResults = false)
{
var ret = new SearchResultsViewModel
{
SearchResults = new List<SearchResultsViewModel.SearchResult>(PageSize), Query = searchQuery
};
// Parse query, possibly throwing a ParseException
Query query;
if (searchQuery.TitlesOnly)
{
var qp = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "Title",
new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29)
);
query = qp.Parse(searchQuery.Query);
}
else
{
query = MultiFieldQueryParser.Parse(Lucene.Net.Util.Version.LUCENE_29, searchQuery.Query,
SearchFields, SearchFlags,
new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29)
);
}
// Perform the actual search
var tsdc = TopScoreDocCollector.create(PageSize * searchQuery.CurrentPage, true);
Searcher.Search(query, tsdc);
ret.TotalResults = tsdc.GetTotalHits();
var hits = tsdc.TopDocs().ScoreDocs;
// Do the suggestion magic
if (suggestOnlyWhenNoResults && ret.TotalResults == 0 || (!suggestOnlyWhenNoResults))
{
ret.Suggestions = new List<string>();
var spellChecker = new SpellChecker.Net.Search.Spell.SpellChecker(Searcher.GetIndexReader().Directory());
// This is kind of a hack to get things working quickly
// for real-world usage we probably want to get the analyzed terms from the Query object
var individualTerms = searchQuery.Query.Split(new[] { ' ', '\t', '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var term in individualTerms)
{
// we only specify field name if we actually got results,
// to improve suggestions relevancy
ret.Suggestions.AddRange(spellChecker.SuggestSimilar(term,
searchQuery.MaxSuggestions,
null,
ret.TotalResults == 0 ? null : "Title",
true));
}
}
// Init the highlighter instance
var fvh = new FastVectorHighlighter(FastVectorHighlighter.DEFAULT_PHRASE_HIGHLIGHT,
FastVectorHighlighter.DEFAULT_FIELD_MATCH,
new SimpleFragListBuilder(),
new ScoreOrderFragmentsBuilder(new[] { "[b]" }, new[] { "[/b]" }));
int i;
for (i = (searchQuery.CurrentPage - 1) * PageSize; i < hits.Length; ++i)
{
var d = Searcher.Doc(hits[i].doc);
var fq = fvh.GetFieldQuery(query);
var fragment = fvh.GetBestFragment(fq, Searcher.GetIndexReader(),
hits[i].doc, "Content", 400);
ret.SearchResults.Add(new SearchResultsViewModel.SearchResult
{
Id = d.Get("Id"),
Title = d.Get("Title"),
Score = hits[i].score,
LuceneDocId = hits[i].doc,
Fragment = MvcHtmlString.Create(fragment.HtmlStripFragment()),
});
}
return ret;
}
public static SearchResultsViewModel Search(SearchQuery searchQuery)
{
var ret = new SearchResultsViewModel
{
SearchResults = new List<SearchResultsViewModel.SearchResult>(PageSize), Query = searchQuery
};
// Parse query, possibly throwing a ParseException
Query query;
if (searchQuery.TitlesOnly) // we only need to query on one field
{
var qp = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "Title",
new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29));
query = qp.Parse(searchQuery.Query);
}
else // querying on both fields, Content and Title
{
query = MultiFieldQueryParser.Parse(Lucene.Net.Util.Version.LUCENE_29, searchQuery.Query,
SearchFields, SearchFlags,
new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29)
);
}
// Init the highlighter instance
var fvh = new FastVectorHighlighter(FastVectorHighlighter.DEFAULT_PHRASE_HIGHLIGHT,
FastVectorHighlighter.DEFAULT_FIELD_MATCH,
new SimpleFragListBuilder(),
new ScoreOrderFragmentsBuilder(new[] { "[b]" }, new[] { "[/b]" })
);
// Perform the actual search
var tsdc = TopScoreDocCollector.create(PageSize * searchQuery.CurrentPage, true);
Searcher.Search(query, tsdc);
ret.TotalResults = tsdc.GetTotalHits();
var hits = tsdc.TopDocs().ScoreDocs;
int i;
for (i = (searchQuery.CurrentPage - 1) * PageSize; i < hits.Length; ++i)
{
var d = Searcher.Doc(hits[i].doc);
var fq = fvh.GetFieldQuery(query);
var fragment = fvh.GetBestFragment(fq, Searcher.GetIndexReader(), hits[i].doc, "Content", 400);
ret.SearchResults.Add(new SearchResultsViewModel.SearchResult
{
Id = d.Get("Id"),
Title = d.Get("Title"),
Score = hits[i].score,
LuceneDocId = hits[i].doc,
Fragment = MvcHtmlString.Create(fragment.HtmlStripFragment()),
});
}
return ret;
}
