In Elastic Search 5.1 I am making basic request with stored_fields body argument (new name for old fields argument) for retrieving the value of a specific field.
But my request give no field value in answer except _index, _type, _id and _score
I Give you sample for context:
I create index and mapping with:
PUT /base_well
{
"mappings": {
"person": {
"properties": {
"first_name":{
"type": "string"
},
"last_name":{
"type": "string"
},
"age":{
"type": "long"
}
}
}
}
}
I populate :
POST /base_well/person
{
"first_name":"James",
"last_name" : "Mopo",
"Age" : 21
}
POST /base_well/person
{
"first_name":"Polo",
"last_name" : "Rodriguez",
"Age" : 36
}
POST /base_well/person
{
"first_name":"Marc Aurelien",
"last_name" : "Poisson",
"Age" : 26
}
POST /base_well/person
{
"first_name":"Mustapha",
"last_name" : "Bulutu M'Bo",
"Age" : 47
}
I do my request with:
POST /base_well/person/_search
{
"stored_fields": ["first_name"]
}
And it give me an answere without the requested field fiest_person:
{
"took": 4,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 8,
"max_score": 1,
"hits": [
{
"_index": "base_well",
"_type": "person",
"_id": "AVlFYzihcR_Z5VPUXUCL",
"_score": 1
},
{
"_index": "base_well",
"_type": "person",
"_id": "AVlFiv3acR_Z5VPUXUCa",
"_score": 1
},
{
"_index": "base_well",
"_type": "person",
"_id": "AVlFiwUKcR_Z5VPUXUCb",
"_score": 1
},
{
"_index": "base_well",
"_type": "person",
"_id": "AVlFYx2LcR_Z5VPUXUCI",
"_score": 1
},
{
"_index": "base_well",
"_type": "person",
"_id": "AVlFYyhScR_Z5VPUXUCJ",
"_score": 1
},
{
"_index": "base_well",
"_type": "person",
"_id": "AVlFYzIJcR_Z5VPUXUCK",
"_score": 1
},
{
"_index": "base_well",
"_type": "person",
"_id": "AVlFivgzcR_Z5VPUXUCZ",
"_score": 1
},
{
"_index": "base_well",
"_type": "person",
"_id": "AVlFiw2qcR_Z5VPUXUCc",
"_score": 1
}
]
}
}
Anybody could explain me to do it and how it works please?
By default, the document fields are not stored, i.e. in your mapping you don't specify store: true for each of them.
Hence, "stored_fields": ["first_name"] will not be able to return the first_name field since it's not stored.
You can use source filtering instead and specify "_source": ["first_name"] in your query, that will work.