Lucene Multi Term Query field search working example in Scala
It was unnecessarily difficult to figure out how to generate a simple query for Lucene able to search documents based on multiple fields.
The way I have personally come to do this is to generate the String query itself and then parse it into a query object.
Here we go (Scala code)
val searchInput = Map(“First Name” -> “John”, “Last Name” -> “Do”)
val parser = new MultiFieldQueryParser(searchInput.keySet.toArray, new CaseInsensitiveWhitespaceAnalyzer())
parser.setDefaultOperator(QueryParserBase.AND_OPERATOR)
val queryString = searchInput.map(i => “(“ + i._1.replaceAll(“ “, “\\\\ “) + “:” + i._2 + “*)”).mkString(“ “)
val query = parser.parse(queryString)
And that is that.
Perhaps obvious? I have wasted enough time trying to find a working example of a multi-field query that I felt it is worthy to note it down.
Let me know of a more elegant approach, I am sure it can be rewritten in a builder pattern, but for the life of me I did not find an example to quickly solve this.
