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_parent
edit
The parent field mapping is defined on a child mapping, and points to
the parent type this child relates to. For example, in case of a blog
type and a blog_tag
type child document, the mapping for blog_tag
should be:
{ "blog_tag" : { "_parent" : { "type" : "blog" } } }
The mapping is automatically stored and indexed (meaning it can be
searched on using the _parent
field notation).
Field data loadingedit
Contrary to other fields the fielddata loading is not lazy
, but eager
. The reason for this is that when this
field has been enabled it is going to be used in parent/child queries, which heavily relies on field data to perform
efficiently. This can already be observed during indexing after refresh either automatically or manually has been executed.