Litium lucene search with exact name is failing for few product name with special characters

Questions
,
1

Hi,

Litium version: 6

I was trying to implement lucene search with exact match of text with product fields and seen search with few product names with special characters returning 0 hits(example name: Polyamide Light Roller with Flange PSAS ---.6200). I have noticed issue is coming only for products with name having special characters.

Is there any issue with lucene search with products having names with special characters?

I am using below optional tag clause to filter my products back and below is the code used

var text = searchQuery.Text;
            if (string.IsNullOrEmpty(text))
            {
                return;
            }
            var cultureInfo = new Guid(request.LanguageId).GetLanguage()?.CultureInfo;
            var textClause = new OptionalTagClause();
            
            textClause.Tags.Add(new Tag("_name".GetFieldDefinitionForProducts()?.GetTagName(cultureInfo), searchQuery.Text) { AllowFuzzy = true });
            textClause.Tags.Add(new Tag("_name".GetFieldDefinitionForProducts()?.GetTagName(cultureInfo), searchQuery.Text + "*"));
            textClause.Tags.Add(new Tag("_name".GetFieldDefinitionForProducts()?.GetTagName(cultureInfo), "*" + searchQuery.Text));
            textClause.Tags.Add(new Tag("_name".GetFieldDefinitionForProducts()?.GetTagName(cultureInfo), "*" + searchQuery.Text + "*"));
            textClause.Tags.Add(new Tag("_name".GetFieldDefinitionForProducts()?.GetTagName(cultureInfo), searchQuery.Text));

            textClause.Tags.Add(new Tag("MonitorArticleNumber".GetFieldDefinitionForProducts()?.GetTagName(cultureInfo), searchQuery.Text) { AllowFuzzy = true });
            textClause.Tags.Add(new Tag("MonitorArticleNumber".GetFieldDefinitionForProducts()?.GetTagName(cultureInfo), searchQuery.Text));
            
            request.FilterTags.Add(textClause);

Am i doing anything wrong in my codes?

2

Have you tried using a different analyzer? Perhaps Whitespace?
https://docs.litium.com/documentation/previous-versions/litium-6/architecture/search/analyzers

The standard analyzer treats dashes and full stops as white space.

3

Hi Nils, Thanks for your time,
The documentation link helped me to learn more about lucene search.

I changed the Analyzer property from

> standard

to

> whitespace, but no luck, still search returned 0 hits, and thinking might be number of special character is more in my case(hyphon, fullstop and white space) and that failing the search. Is there any way i can tell the search so that it will accept more than one special character?

4

Try to use the keyword analyzer. It can be that you need to modify the analyzer also for indexing that is using the standard analyzer.

5

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