93 lines
2.7 KiB
Plaintext
93 lines
2.7 KiB
Plaintext
[[dynamic]]
|
|
=== `dynamic`
|
|
|
|
By default, fields can be added _dynamically_ to a document, or to
|
|
<<object,inner objects>> within a document, just by indexing a document
|
|
containing the new field. For instance:
|
|
|
|
[source,js]
|
|
--------------------------------------------------
|
|
DELETE my_index <1>
|
|
|
|
PUT my_index/my_type/1 <2>
|
|
{
|
|
"username": "johnsmith",
|
|
"name": {
|
|
"first": "John",
|
|
"last": "Smith"
|
|
}
|
|
}
|
|
|
|
GET my_index/_mapping <3>
|
|
|
|
PUT my_index/my_type/2 <4>
|
|
{
|
|
"username": "marywhite",
|
|
"email": "mary@white.com",
|
|
"name": {
|
|
"first": "Mary",
|
|
"middle": "Alice",
|
|
"last": "White"
|
|
}
|
|
}
|
|
|
|
GET my_index/_mapping <5>
|
|
--------------------------------------------------
|
|
// AUTOSENSE
|
|
<1> First delete the index, in case it already exists.
|
|
<2> This document introduces the string field `username`, the object field
|
|
`name`, and two string fields under the `name` object which can be
|
|
referred to as `name.first` and `name.last`.
|
|
<3> Check the mapping to verify the above.
|
|
<4> This document adds two string fields: `email` and `name.middle`.
|
|
<5> Check the mapping to verify the changes.
|
|
|
|
The details of how new fields are detected and added to the mapping is explained in <<dynamic-mapping>>.
|
|
|
|
The `dynamic` setting controls whether new fields can be added dynamically or
|
|
not. It accepts three settings:
|
|
|
|
[horizontal]
|
|
`true`:: Newly detected fields are added to the mapping. (default)
|
|
`false`:: Newly detected fields are ignored. New fields must be added explicitly.
|
|
`strict`:: If new fields are detected, an exception is thrown and the document is rejected.
|
|
|
|
The `dynamic` setting may be set at the mapping type level, and on each
|
|
<<object,inner object>>. Inner objects inherit the setting from their parent
|
|
object or from the mapping type. For instance:
|
|
|
|
[source,js]
|
|
--------------------------------------------------
|
|
PUT my_index
|
|
{
|
|
"mappings": {
|
|
"my_type": {
|
|
"dynamic": false, <1>
|
|
"properties": {
|
|
"user": { <2>
|
|
"properties": {
|
|
"name": {
|
|
"type": "text"
|
|
},
|
|
"social_networks": { <3>
|
|
"dynamic": true,
|
|
"properties": {}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
--------------------------------------------------
|
|
// AUTOSENSE
|
|
<1> Dynamic mapping is disabled at the type level, so no new top-level fields will be added dynamically.
|
|
<2> The `user` object inherits the type-level setting.
|
|
<3> The `user.social_networks` object enables dynamic mapping, so new fields may be added to this inner object.
|
|
|
|
TIP: The `dynamic` setting is allowed to have different settings for fields of
|
|
the same name in the same index. Its value can be updated on existing fields
|
|
using the <<indices-put-mapping,PUT mapping API>>.
|
|
|
|
|