Elasticsearch sorting on string not returning expected results
As mconlin mentioned if you want to sort on the unanalyzed doc field you need to specify "index": "not_analyzed" to sort as you described. But if you're looking to be able to keep this field tokenized to search on, this post by sloan shows a great example. Using multi-field to keep two different mappings for a field is very common in Elasticsearch.
Hope this helps, let me know if I can offer more explanation.
If you want the sorting to be case-insensitive "index": "not_analyzed" doesn't work, so I've created a custom sort analyzer.
index-settings.yml
index : analysis : analyzer : sort : type : custom tokenizer : keyword filter : [lowercase]Mapping:
..."articleName": { "type": "string", "analyzer": "standard", "fields": { "sort": { "type": "string", "analyzer": "sort" } }}...