How to deal with elasticsearch range Beetween 2 dates - php

Question

I have the following mapping:
'contract' => [
'type' => 'nested',
'include_in_parent' => true,
'properties' => [
'started_at' => ['type' => 'date', 'format' => 'yyyy-MM-dd'],
'ended_at' => ['type' => 'date', 'format' => 'yyyy-MM-dd'],
],
],
I'm trying to write a query that searches for all active contracts; a contract is active when now is between started_at and anded_at, or started_at < now if the contract is undetermined (ended_at is null).
my try was the following, but still doesn't handle both the cases:
'bool' => [
'must' => [
['range' => ['applications.contract.started_at' => ['lte' => 'now']]],
['range' => ['applications.contract.ended_at' => ['gte' => 'now']]],
],
],
Any hint would be awesome, thanks folks!

Answer 1

When you have "nullable" field as "ended_at" you need to combine "range" and "must_not" into "should" because elasticsearch does not index NULL value (as a result it's a missing field)
So your query will look something like this:
{
"query": {
"bool": {
"must": [
{
"range": {"applications.contract.started_at": {"lte": "now"}}
},
"should": [
{
"range": {
"applications.contract.ended_at": {"gte": "now"}
}
},
{
"bool": {
"must_not": {
"exists": "applications.contract.ended_at"
}
}
}
]
}
}
}
also, I've noticed that you are using "nested" documents so the query above must be wrapped into a nested query
{
"bool": {
"must": {
"nested": {
"path": "contract",
"query": {
"bool": {
"must": [
{
"range": {"applications.contract.started_at": {"lte": "now"}}
}
],
"should": [
{
"range": {
"applications.contract.ended_at": {"gte": "now"}
}
},
{
"bool": {
"must_not": {
"exists": {"field": "applications.contract.ended_at"}
}
}
}
]
}
}
}
}
}
}