Stemming does not work properly for MongoDB text index

Question

I am trying to use full text search feature of MongoDB and observing some unexpected behavior. The problem is related to \"stemming\" aspect of the text indexing feature. T

Answer 1

After a fair amount of experimenting and scratching my head I discovered the reason for this behavior. It turned out that the documents in the collection in question had attribute 'language'. Apparently the presence and the value of that attribute made these documents non-searchable. (The value happened to be 'ENG'. It is possible that changing it to 'eng' would make this document searchable again. The field, however, served a completely different purpose). After I renamed the field to 'lang' I was able to find the document containing the word "dogs" by searching for "dog" or "dogs".

I wonder whether this is expected behavior of MongoDB - that the presence of language attribute in the document would affect the text search.