| Sometimes it's not practical to explicitly list all the fields one wants to target when searching. Maybe there are lots of them, maybe you just want to target all fields that can be targeted, ... Some related discussions on the forums:
Elasticsearch offers several solutions to that problem; we should investigate and pick the most appropriate.
In particular:
- Some queries implicitly target all relevant fields when we don't pass a field name (simple query string in particular)
- The copy_to attribute in the mapping allows copying the content of a field to another at indexing time : https://www.elastic.co/guide/en/elasticsearch/reference/current/copy-to.html
- I remember seeing something about an _all field whose content is the content of all other fields? Though I believe it was disabled by default.
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