Elasticsearch partial update script: Clear array and replace with new values

Question

I have documents like:

{
  MyProp: [\"lorem\", \"ipsum\", \"dolor\"]
  ... lots of stuff here ...
}

My documents can be quite big (but thes

Answer 1

Would a _bulk update work for you?

POST test/type1/_bulk
{"update":{"_id":1}}
{"script":{"inline":"ctx._source.MyProp += new_param","params":{"new_param":"bla"},"lang":"groovy"}}
{"update":{"_id":2}}
{"script":{"inline":"ctx._source.MyProp += new_param","params":{"new_param":"bla"},"lang":"groovy"}}
{"update":{"_id":3}}
{"script":{"inline":"ctx._source.MyProp += new_param","params":{"new_param":"bla"},"lang":"groovy"}}
....

And you would also need to enable inline scripting for groovy. What the above would do is to add a bla value to the listed documents in MyProp field. Of course, depending on your requirements many other changes can be performed in that script.