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https://issues.apache.org/jira/browse/SOLR-13863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16984218#comment-16984218
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Vincenzo D'Amore commented on SOLR-13863:
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Ok, now it’s clearer. But this doesn’t not scale out if you have many stores.
I’m even been discouraged to do so by many in the Solr forum. on the other
hand,
I was asked by Erick Erickson to contribute with this solution.
https://lucene.472066.n3.nabble.com/Solr-Payload-example-td4451173.html
> payload query function support for string encoded payloads
> (delimited_payloads_string)
> --------------------------------------------------------------------------------------
>
> Key: SOLR-13863
> URL: https://issues.apache.org/jira/browse/SOLR-13863
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Components: query parsers, search, SearchComponents - other
> Reporter: Vincenzo D'Amore
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> I have the per-store pricing problem but payload function handles only
> numbers.
> Stores can also be in different countries, for example would be useful having
> with the price also the currency and other attributes related to the store.
> We could have add support for string encoded payloads fixing function query
> named *payload*.
> Example document:
> {
> {{ "id":"my sample doc",}}
> {{ "currencyPayload":[}}
> {{ "store1|EUR",}}
> {{ "store1|USD",}}
> {{ "store3|GBP"}}
> {{ ]}}
> }
> Querying Solr with
> {{fl=payload(currencyPayload,store3)}}
> would generate a response like the following:
> {
> {{ "response": {}}
> {{ "docs":[}}{
> {{ "id":"my sample doc", }}
> {{ "payload(currencyPayload,store3)":"GBP"}}
> {{ }]}}
> }
> {{}}}
> And executing `payload(payloadCurrency,store2)` returns `EUR`, and so on.
> You can use `payload` even as sorting function.
> {{sort=payload(payloadField,value) asc}}
>
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