Enforce field names do not contain dot #12068
Merged
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Field names containing dots can cause problems. For example, @jpountz
made this recreation which causes no error, but can result in a
serialization exception if the type already exists:
https://gist.github.com/jpountz/8c66817e00a322b81f85
But this is not just a potential conflict. It also has larger problems,
since only the leaf mapper is created. The intermediate "foo" object
field would not exist if only "foo.bar" was in the mappings.
This change forbids the use of dots in field names. It also
fixes an issue with passing through the update_all_types setting,
which was always set to true whenever a type already existed (!).
I do not think we should worry about backwards compatibility here. This
should be a hard break (and added to the migration plugin).