CODEWITHSUNDEEP
solr
thebernardlim
thebernardlim

Reputation: 830

Solr lowercase doesnt work

I am trying to implement case-insensitive search to my title and content fields, however to no avail. I have tried the following methods:

Adding <filter class="solr.LowerCaseFilterFactory" /> to 'text_general' field type in schema.xml / managed-schema.xml, to both 'index' and 'analyze' tokenizers.

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My title and content field each will be of 'text_general' type. enter image description here

I tried searching the following:

This clearly shows that lowercase filters are not working. Also pasted below is the debug results of the first query.

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Also below is the screenshot of the title field when analyzing a sample text. Output seems ok, but search does not work as per expected. Is this a search query issue?

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Thanks for any help in advanced!

Upvotes: 0

Views: 699

Answers (1)

MatsLindh
MatsLindh

Reputation: 52802

No, it doesn't clearly show that the lowercase filtering doesn't work - what you're experiencing is that most filters or tokenizers aren't applied when you're doing a wildcard search (since they really can't be applied cleanly for a wildcard search where they don't have the whole term to work with).

The solution is, if you want to perform a wildcarded, lowercased search, is to perform the lowercasing or processing of the field before actually indexing it, and using only a tokenizer to split the text as necessary (where LowercaseTokenizer seems to be the only one that is a MultiTermAwareComponent). Otherwise, if you don't want to perform any tokenization or splitting of the string, use a string field.

You can do this either in your own code that sends content to Solr or in an update processor.

Upvotes: 0

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