Hi all,
I am trying out the _id mapping path feature, described here:
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/mapping-id-field.html
It works well, though I think I've noticed a limitation (or bug). In my
project, we allow mappings to be changed over time. The problem I'm seeing
is that the _id path doesn't seem to change once it is created. I cannot
change or remove it. Further, elasticsearch does not return an error when
I attempt this. A couple of thoughts: (1) if this is a legitimate
limitation, then please note this on the reference page I mentioned above,
and (2) when a user attempts this, elastic should return an error (with
readable description) rather than returning a success code & message. Even
better would be to enable this feature, and allow the path to be updated.
Perhaps that's a feature request, not a bug?
I searched the issues on github and in this group, and didn't see this
limitation mentioned. If anyone could shed some light, please let me
know. Perhaps I'm not using it correctly.
Here are the steps to demonstrate. I've tried this on 1.3.1 and 1.3.4.
curl -XDELETE localhost:9200/index1
curl -XPUT localhost:9200/index1
curl -XPOST localhost:9200/index1/tweet/_mapping -d '
{
"tweet" : {
"dynamic": "strict",
"properties" : {
"message" : {"type" : "string" }
},
"_id": {
"path": "post_id"
}
}
}'
curl -XGET localhost:9200/index1/tweet/_mapping?pretty
curl -XPOST localhost:9200/index1/tweet/_mapping -d '
{
"tweet" : {
"dynamic": "strict",
"properties" : {
"message" : {"type" : "string" }
},
"_id": {
"path": "changed"
}
}
}'
curl -XGET localhost:9200/index1/tweet/_mapping?pretty
The 2nd POST returns *"acknowledged": true* even though the change of the
_id path was not actually effective. You can verify this by observing the
2nd GET, i.e., it will still return *"path": "post_id"* .
Note that the use of "dynamic":"strict" does not seem to change the outcome.
Thanks for your help!
-Ryan
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