Suggester

In the preceding section, we have seen how Solr handles incorrectly spelled terms and then returns the correct output for them. Let's move one step ahead and provide a feature wherein the user always enters correct spellings but we want to be a step ahead and provide list of suggestions using whatever the user has already typed. This can be achieved by a Solr tool called suggester. The suggester suggests terms when the user types words. During the implementation of the suggester, we need to consider these two things:

• It must be very fast as we need to display suggestions on the user's characters type
• The suggestions should be ranked and ordered by term frequency

To configure any suggester, SuggestComponent needs to be configured in solrconfig.xml. Here is a simple configuration of a suggester:

<searchComponent name="suggest" class="solr.SuggestComponent">
 <lst name="suggester">
 <str name="name">mySuggester</str>
 <str name="lookupImpl">FuzzyLookupFactory...