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  • Martin Lingstuyl 202 posts 379 karma points
    Jan 26, 2011 @ 10:39
    Martin Lingstuyl
    1

    Umbraco Examine and Wildcardsearching

    Hi,

    I'm creating a simple Lucene search module for one of my websites. I first watched the umbraco.tv episodes to get it all in my head.

    So I first copied the example from umbraco.tv to start. created a demoindex, checked it through luke. Everything worked. Created the usercontrol, did a search. It worked...but then I ran into something strange:

    when I search for 'word' (without quotes of course) it does not find 'largerword'. Using * doesn't seem to help in this, and I cannot seem to find the problem.

    Anyone have experience with Examine and know what this is about?

     

    thanks

    Martin

  • Ismail Mayat 4511 posts 10063 karma points MVP 2x admin c-trib
    Jan 26, 2011 @ 11:51
    Ismail Mayat
    4

    Martin,

    In you query code you need to ensure you do wild card query this is done by

    var criteria = searcher.CreateSearchCriteria();           
                IBooleanOperation query = criteria.Field("contents",searchQuery.MultipleCharacterWildcard());

    the MultipleCharacterWildCard() is an extension method on strings and is part of the examine library. That will when query is compile tag the * wildcard character giving you a wildcard query.

    Regards

    Ismail

  • Martin Lingstuyl 202 posts 379 karma points
    Jan 26, 2011 @ 12:37
    Martin Lingstuyl
    0

    Hi Ismail,

    thanks for replying that quickly. I'm trying it out, but maybe I'm missing something:

    SearchTerm.MultipleCharacterWildCard() doesnt work with me because SearchTerm is a protected string SearchTerm { get; private set; }

     

    Do I need to include a reference to the extensionlibrary? It should be a string right? Not a IExamineValue?

     

    martin

     

  • Ismail Mayat 4511 posts 10063 karma points MVP 2x admin c-trib
    Jan 26, 2011 @ 12:48
    Ismail Mayat
    1

    Its a member of UmbracoExamine.SearchCriteria.LuceneSearchExtensions 

    Regards

    Ismail

  • Martin Lingstuyl 202 posts 379 karma points
    Jan 26, 2011 @ 12:56
    Martin Lingstuyl
    1

    Thanks a lot!

    a last question, where do I input the IbooleanOperation query?

    somewhere in here?

    var filter = criteria 
                       .GroupedOr(new string[] { "nodeName", "naamArtikel", "omschrijving" }, SearchTerm.ToLower())
                       .Not()
                       .Field("umbracoNaviHide", "1")                  
                       .Compile();

     

  • Antoinette Silago 21 posts 92 karma points notactivated
    Jun 05, 2017 @ 20:19
    Antoinette Silago
    0

    Thank for this post... been trying to figure this out!!

  • Ismail Mayat 4511 posts 10063 karma points MVP 2x admin c-trib
    Jan 26, 2011 @ 13:20
    Ismail Mayat
    1

    where you have SearchTerm.ToLower() just add the MultipleCharacterWildCard() so you have

    SearchTerm.ToLower().MultipleCharacterWildCard()

    Regards

    Ismail

  • Martin Lingstuyl 202 posts 379 karma points
    Jan 26, 2011 @ 15:13
    Martin Lingstuyl
    0

     

    Hi Ismail,

     

    thanks for the reply. The wildcards' working now.

    But putting the * before the word doesnt work. So now I can search ' larger* ' and find 'largerword'. But I cannot search ' *word ' and find 'largerword'

    Any ideas?

     

  • Matt Taylor 870 posts 2083 karma points
    Mar 14, 2011 @ 17:52
    Matt Taylor
    0

    I'm hoping this post will help me as I have the same issue.

    To answer your last question Martin, a wild card is not permitted at the start of a search, http://lucene.apache.org/java/2_3_2/queryparsersyntax.html

  • Martin Lingstuyl 202 posts 379 karma points
    Mar 14, 2011 @ 19:55
    Martin Lingstuyl
    0

    I learned that already, but thanks anyway.

    It's just a weird not really thought out issue with lucene.

    although I heard that it is possible to enable it, but hten you have to extend the examine class.

     

  • Matt Taylor 870 posts 2083 karma points
    Mar 15, 2011 @ 13:36
    Matt Taylor
    0

    Can somebody tell me what I'm doing wrong?

    It won't recognise MultipleCharacterWildcard() as a valid string extension so I cannot compile it.

    I have references to Examine & UmbracoExamine and the folowing code:

    using Examine;
    using Examine.SearchCriteria;
    private void PerformSearch(string searchTerm)
            {
                if (string.IsNullOrEmpty(searchTerm)) return;
               
                var criteria = ExamineManager.Instance
                    .SearchProviderCollection["SiteSearchSearcher"]
                    .CreateSearchCriteria(UmbracoExamine.IndexTypes.Content);

                var filter = criteria
                    .GroupedOr(new string[] { "nodeName", "browserTitle", "metaKeywords", "metaDescription",
                        "featureTitle", "featureSummary", "title", "searchKeywords", "summary", "body", "footer" }, searchTerm.MultipleCharacterWildCard())
                    .Not()
                    .Field("umbracoNaviHide", "1")
                    .Compile();

                SearchResults = ExamineManager.Instance
                    .SearchProviderCollection["SiteSearchSearcher"]
                    .Search(filter);

                searchResultsRepeater.DataSource = SearchResults.Skip(CurrentPage * _pageSize).Take(_pageSize);
               
                searchResultsRepeater.DataBind();

            }

    Thanks, Matt

  • Martin Lingstuyl 202 posts 379 karma points
    Mar 15, 2011 @ 14:37
    Martin Lingstuyl
    0

    the MultipleSearchCriteria extension is hidden somewhere deeper within the examine namespace, because otherwise the string extension would pop up everywhere.

    I think you only have to add:

     

    using UmbracoExamine.SearchCriteria.LuceneSearchExtensions

     

    Then it will work

  • Connie DeCinko 931 posts 1159 karma points
    Sep 28, 2011 @ 23:12
    Connie DeCinko
    0

    Adding that does not work.  LuceneSearchExtensions does not exist in that namespace.

     

  • suzyb 469 posts 905 karma points
    Jul 03, 2012 @ 17:49
    suzyb
    0

    Does anyone have an answer to the MultipleCharacterWildCard extension is.  I am trying to use it but can't find where it is.

  • Matt Taylor 870 posts 2083 karma points
    Jul 03, 2012 @ 18:23
    Matt Taylor
    0

    Hmmm this may not help you but I looked back at what I did and ended up using .Fuzzy() instead.

  • suzyb 469 posts 905 karma points
    Jul 04, 2012 @ 12:18
    suzyb
    3

    I'm just searching for the first initial of a name so don't really need fuzzy.

    But for anyone finding this in the future it seems to be in Examine.LuceneEngine.SearchCriteria.

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