Hi
I am new to elasticsearch and am trying out the attachement plugin. I'm a
bit confused on how to handle the meta-data from the attachements.
I have created a simple mapping as example. I explicitly store the 'title'
field, other fields are by default not stored.
PUT /test/file/_mapping
{
random : {
properties: {
content : {
type : attachment,
fields : {
title : {
index: analyzed,
store : yes
},
content_type : {
store : no
}
}
}
}
}
}
This is the mapping as given by elasticsearch
{
test: {
mappings: {
file: {
properties: {
content: {
type: attachment,
path: full,
fields: {
content: {
type: string
},
author: {
type: string
},
title: {
type: string,
store: true
},
name: {
type: string
},
date: {
type: date,
format: dateOptionalTime
},
keywords: {
type: string
},
content_type: {
type: string
},
content_length: {
type: integer
}
}
}
}
}
}
}
}
Example query:
GET /test/file/_search
{
fields: [
*, content.content_type
],
query: {
match: {
content.content_type: xhtml test document
}
}
}
response:
{
took: 13,
timed_out: false,
_shards: {
total: 5,
successful: 5,
failed: 0
},
hits: {
total: 1,
max_score: 0.26574233,
hits: [
{
_index: test,
_type: file,
_id: 3SmwWJe6TtiP0nheD6pFCg,
_score: 0.26574233,
fields: {
content.content_type: [
...PCEtLQogTGljZW5zZWQgdG8gdGhlI...
],
content.title: [
XHTML test document
]
}
}
]
}
}
So I am able to query on the content_type field, but in the response I
get the base64 representation of the attachement, instead of
application/xhtml+xml.
Do I really need to store each meta-data field for my attachement? I was
under the impression that elasticsearch would extract the field from the
_source at runtime (or would this cause to much overhead?)
Thx,
Tom
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