Cloudant database search index - ibm-cloud

Question

I have a Json document in cloudant as:
{
"createdAt": "2022-10-26T09:16:29.472Z",
"user_id": "4499c1c2-7507-4707-b0e4-ec83e2d2f34d",
"_id": "606a4d591031c14a8c48fcb4a9541ff0"
}
{
"createdAt": "2022-10-24T11:15:24.269Z",
"user_id": "c4bdcb54-3d0a-4b6a-a8a9-aa12e45345f3",
"_id": "fb24a15d8fb7cdf12feadac08e7c05dc"
}
{
"createdAt": "2022-10-24T11:08:24.269Z",
"user_id": "06d67681-e2c4-4ed4-b40a-5a2c5e7e6ed9",
"_id": "2d277ec3dd8c33da7642b72722aa93ed"
}
I have created a index json as:
{
"type": "json",
"partitioned": false,
"def": {
"fields": [
{
"createdAt": "asc"
},
{
"user_id": "asc"
}
]
}
}
I have created a index text as:
{
"type": "text",
"partitioned": false,
"def": {
"default_analyzer": "keyword",
"default_field": {},
"selector": {},
"fields": [
{
"_id": "string"
},
{
"createdAt": "string"
},
{
"user_id": "string"
}
],
"index_array_lengths": true
}
}
I have created a selctor cloudant query :
{
"selector": {
"$and": [
{
"createdAt": {
"$exists": true
}
},
{
"user_id": {
"$exists": true
}
}
]
},
"fields": [
"createdAt",
"user_id",
"_id"
],
"sort": [
{
"createdAt": "desc"
}
],
"limit": 10,
"skip": 0
}
This code work fine inside the cloudant ambient.
My problem is in the Search Index.
I created this function code that works,
function (doc) {
index("specialsearch", doc._id);
if(doc.createdAt){
index("createdAt", doc.createdAt, {"store":true})
}
if(doc.user_id){
index("user_id", doc.user_id, {"store":true})
}
}
result by this url:
// https://[user]-bluemix.cloudant.com/[database]/_design/attributes/_search/by_all?q=*:*&counts=["createdAt"]&limit=2
{
"total_rows": 10,
"bookmark": "xxx",
"rows": [
{
"id": "fb24a15d8fb7cdf12feadac08e7c05dc",
"order": [
1.0,
0
],
"fields": {
"createdAt": "2022-10-24T11:15:24.269Z",
"user_id": "c4bdcb54-3d0a-4b6a-a8a9-aa12e45345f3"
}
},
{
"id": "dad431735986bbf41b1fa3b1cd30cd0f",
"order": [
1.0,
0
],
"fields": {
"createdAt": "2022-10-24T11:07:02.138Z",
"user_id": "76f03307-4497-4a19-a647-8097fa288e77"
}
},
{
"id": "2d277ec3dd8c33da7642b72722aa93ed",
"order": [
1.0,
0
],
"fields": {
"createdAt": "2022-10-24T11:08:24.269Z",
"user_id": "06d67681-e2c4-4ed4-b40a-5a2c5e7e6ed9"
}
}
]
}
but it doesn't return the id sorted by date based on the createdAt and user_id keys.
What I would like is to get a list of an organized search with the index of the createdAt and user_id keys without having to indicate the value; a wildcard type search
Where am I wrong?
I have read several posts and guides but I did not understand how to do it.
Thanks for your help.

Answer 1

You say you want to return a list of id, createdAt and user_id, sorted by createdAt and user_id. And that you want all the documents returned.
If that is the case, what you need to do is simply create a MapReduce view of your data that emits the createdAt and user_id fields in that order, i.e. :
function (doc) {
emit([doc.createdAt, doc.user_id], 1);
}
You don't need to include the document id because that comes for free.
You can then query the view by visiting the URL:
https://<URL>/<database>/_design/<ddoc_name>/_view/<view_name>
You will get all the docs like this:
{"total_rows":3,"offset":0,"rows":[
{"id":"2d277ec3dd8c33da7642b72722aa93ed","key":["2022-10-24T11:08:24.269Z","06d67681-e2c4-4ed4-b40a-5a2c5e7e6ed9"],"value":1},
{"id":"fb24a15d8fb7cdf12feadac08e7c05dc","key":["2022-10-24T11:15:24.269Z","c4bdcb54-3d0a-4b6a-a8a9-aa12e45345f3"],"value":1},
{"id":"606a4d591031c14a8c48fcb4a9541ff0","key":["2022-10-26T09:16:29.472Z","4499c1c2-7507-4707-b0e4-ec83e2d2f34d"],"value":1}
]}