adding second example to demonstrate edge ngram mapping

mapping.go

@@ -8,6 +8,7 @@
 //  and limitations under the License.
 
 // +build !example1
+// +build !example2
 
 package main
 

mapping_example1.go

@@ -20,9 +20,8 @@ const textFieldAnalyzer = "en"
 func buildIndexMapping() (*bleve.IndexMapping, error) {
 
 	// a custom field definition that uses our custom analyzer
-	notTooLongFieldMapping := bleve.NewFieldMapping(
-		"", "text", "enNotTooLong",
-		true, true, true, true)
+	notTooLongFieldMapping := bleve.NewTextFieldMapping()
+	notTooLongFieldMapping.Analyzer = "enNotTooLong"
 
 	// a generic reusable mapping for english text
 	englishTextFieldMapping := bleve.NewTextFieldMapping()

mapping_example2.go

@@ -0,0 +1,94 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+//  except in compliance with the License. You may obtain a copy of the License at
+//    http://www.apache.org/licenses/LICENSE-2.0
+//  Unless required by applicable law or agreed to in writing, software distributed under the
+//  License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+//  either express or implied. See the License for the specific language governing permissions
+//  and limitations under the License.
+
+// +build example2
+
+package main
+
+import (
+	"github.com/blevesearch/bleve"
+)
+
+const textFieldAnalyzer = "en"
+
+func buildIndexMapping() (*bleve.IndexMapping, error) {
+
+	// a custom field definition that uses our custom analyzer
+	edgeNgram325FieldMapping := bleve.NewTextFieldMapping()
+	edgeNgram325FieldMapping.Analyzer = "enWithEdgeNgram325"
+
+	// a generic reusable mapping for english text
+	englishTextFieldMapping := bleve.NewTextFieldMapping()
+	englishTextFieldMapping.Analyzer = "en"
+
+	// a generic reusable mapping for keyword text
+	keywordFieldMapping := bleve.NewTextFieldMapping()
+	keywordFieldMapping.Analyzer = "keyword"
+
+	// a specific mapping to index the description fields
+	// detected language
+	descriptionLangFieldMapping := bleve.NewTextFieldMapping()
+	descriptionLangFieldMapping.Name = "descriptionLang"
+	descriptionLangFieldMapping.Analyzer = "detect_lang"
+	descriptionLangFieldMapping.Store = false
+	descriptionLangFieldMapping.IncludeTermVectors = false
+	descriptionLangFieldMapping.IncludeInAll = false
+
+	beerMapping := bleve.NewDocumentMapping()
+
+	// name
+	beerMapping.AddFieldMappingsAt("name", englishTextFieldMapping)
+
+	// description
+	beerMapping.AddFieldMappingsAt("description",
+		edgeNgram325FieldMapping,
+		descriptionLangFieldMapping)
+
+	beerMapping.AddFieldMappingsAt("type", keywordFieldMapping)
+	beerMapping.AddFieldMappingsAt("style", keywordFieldMapping)
+	beerMapping.AddFieldMappingsAt("category", keywordFieldMapping)
+
+	breweryMapping := bleve.NewDocumentMapping()
+	breweryMapping.AddFieldMappingsAt("name", englishTextFieldMapping)
+	breweryMapping.AddFieldMappingsAt("description", englishTextFieldMapping)
+
+	indexMapping := bleve.NewIndexMapping()
+	indexMapping.AddDocumentMapping("beer", beerMapping)
+	indexMapping.AddDocumentMapping("brewery", breweryMapping)
+
+	indexMapping.TypeField = "type"
+	indexMapping.DefaultAnalyzer = textFieldAnalyzer
+
+	err := indexMapping.AddCustomTokenFilter("edgeNgram325",
+		map[string]interface{}{
+			"type": "edge_ngram",
+			"min":  3.0,
+			"max":  25.0,
+		})
+	if err != nil {
+		return nil, err
+	}
+
+	err = indexMapping.AddCustomAnalyzer("enWithEdgeNgram325",
+		map[string]interface{}{
+			"type":      "custom",
+			"tokenizer": "unicode",
+			"token_filters": []string{
+				"possessive_en",
+				"to_lower",
+				"stop_en",
+				"edgeNgram325",
+			},
+		})
+	if err != nil {
+		return nil, err
+	}
+
+	return indexMapping, nil
+}