umbraco web api with examine lucene question

Enrico 47 posts 252 karma points

Dec 18, 2015 @ 16:26

Hello everyone, I am a newbie with Examine and Lucene. I wanted to use them to query the cache instead of hitting the database. It works! The search are performing well and quickly. The only problem that I have is to build queries.

I want to focus my search on a specific 'nodeTypealias' and get all the 'nodeNames' connected. That was not particularly difficult. The problem started when I wanted to apply another filter to this selection and get only 'nodeName' starting with letter 'a' or 'b'.

This is my Web APi code:

public class PeopleApiController : UmbracoApiController
    {



        public IEnumerable<SearchResult> GetPeople(string letter = "") {



            var Searcher = ExamineManager.Instance.SearchProviderCollection["ExternalSearcher"];
            var searchCriteria = Searcher.CreateSearchCriteria(BooleanOperation.Or);
            var q = "nodeTypeAlias:PeopleDetails";
            var query = searchCriteria.RawQuery(q);


            IEnumerable<SearchResult> results = Searcher.Search(query);

            return results;
        }

    }

How could I combine the part with wildcards like :

"nodeName:" + letter + "?";

I tried also to do something like:

public IEnumerable<SearchResult> GetPeople(string letter = "") {

            var Searcher = ExamineManager.Instance.SearchProviderCollection["ExternalSearcher"];
            var searchCriteria = Searcher.CreateSearchCriteria("content");
            var query = searchCriteria.NodeTypeAlias("PeopleDetails").And().NodeName(letter + "?").Compile();

            IEnumerable<SearchResult> results = Searcher.Search(query);

            return results;
        }

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Marc Goodson 2157 posts 14431 karma points MVP 9x c-trib

Dec 18, 2015 @ 19:52

Hi Enrico

I think you are looking for the

MultipleCharacterWildcard()

extension method

in

using Examine.LuceneEngine.SearchCriteria; (add this as a using statement to get access to the extension method)

eg

    var criteria = searcher.CreateSearchCriteria();
var query = searchCriteria.NodeTypeAlias("PeopleDetails").And().NodeName(letter.MultipleCharacterWildcard()).Compile();

More documentation here on the Fluent Search API here

https://github.com/Shazwazza/Examine/wiki/FluentSearchApi

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Enrico 47 posts 252 karma points

Dec 19, 2015 @ 11:14

Great Mark

it worked like a charm

Thanks again

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Enrico 47 posts 252 karma points

Jan 04, 2016 @ 11:08

Hi Mark,

thanks to your help I built a function that works great with letters.

This is the code, I hope it could be helpful to anyone that is dealing with the same feature

HTML CODE :

<div id="letter-container">
            <div>&nbsp;</div>
            <div><a href="#" >ALL</a></div>
            <div><a href="#a" >A</a></div>
            <div><a href="#b">B</a></div>
            <div><a href="#c">C</a></div>
            <div><a href="#d">D</a></div>
            <div><a href="#e">E</a></div>
            <div><a href="#f">F</a></div>
            <div><a href="#g">G</a></div>
            <div><a href="#h">H</a></div>
            <div><a href="#i">I</a></div>
            <div><a href="#h">J</a></div>
            <div><a href="#k">K</a></div>
            <div><a href="#l">L</a></div>
            <div><a href="#m">M</a></div>
            <div><a href="#n">N</a></div>
            <div><a href="#o">O</a></div>
            <div><a href="#p">P</a></div>
            <div><a href="#q">Q</a></div>
            <div><a href="#r">R</a></div>
            <div><a href="#s">S</a></div>
            <div><a href="#t">T</a></div>
            <div><a href="#u">U</a></div>
            <div><a href="#w">W</a></div>
            <div><a href="#x">X</a></div>
            <div><a href="#y">Y</a></div>
            <div><a href="#z">Z</a></div>
            <div></div>
   </div>

JQuery code :

  $(function () {

        $("#letter-container a").on('click', function (e) {
                e.stopImmediatePropagation();
                e.preventDefault();
                var element = $(this);
                var letter = element.attr('href').replace('#','');
                // console.log(letter);


                $.ajax({
                    url: '/umbraco/api/peopleapi/GetPeople',
                    data:{letter : letter},
                    dataType:'json',
                    success: displayExamineResult,
                    error: displayError

                });
            });



        var displayExamineResult = function (response) {
                if (typeof response != 'undefined') {
                    if (response != null) {
                        $.each(response, function (index, value) {

                            // console.log(index + " " + value);
                            if (value.Fields != null) {
                                $.each(value.Fields, function (i, v) {
                                   // your code to display results
                                    console.log( i + " : " + v);
                                });
                            }

                        });

                    }
                    else {
                        console.log("No result found for the specified search criteria .");
                    }

                }
            };

            var displayError = function (jqXHR, textStatus, errorThrown) {
                console.log(errorThrown);
            };


 });

The Api Controller Code :

[HttpGet]
    public IEnumerable<SearchResult> GetPeople(string letter = "") {
        IEnumerable<SearchResult> results;

        var Searcher = ExamineManager.Instance.SearchProviderCollection["ExternalSearcher"];

        if (string.IsNullOrEmpty(letter))
        {
            var criteria = Searcher.CreateSearchCriteria();
            var query = criteria.NodeTypeAlias("PeopleDetails").Compile();
            results = Searcher.Search(query);
            return results;
        }
        else {
            var criteria = Searcher.CreateSearchCriteria();
            var query = criteria.NodeTypeAlias("PeopleDetails").And().NodeName(letter.MultipleCharacterWildcard()).Compile();
            results = Searcher.Search(query);
            return results;
        }


    }

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Umbraco Web Api with Examine Lucene question