CODEWITHSUNDEEP
marklogicmarklogic-8
Shon
Shon

Reputation: 700

Why does multiple "collection" URL parameters in REST search request return no results?

According to the MarkLogic docs, the "collection" parameter can appear multiple times in a GET request to the REST Client API; however, the following returns 0 results:

/LATEST/search?q=&collection=GEWN&collection=TSJN

whereas an XQuery specifying both collections on the same database does return the expected results:

count(collection(("GEWN","TSJN")))

=> 90871

Using REST API to query one named collection individually returns expected results also.

Thanks.

Upvotes: 0

Views: 305

Answers (1)

ehennum
ehennum

Reputation: 7335

The collections provided by URI parameter are AND related. The equivalent provided as a query would be:

<search:query>
<search:and-query>
    <search:collection-query>
        <search:uri>GEWN</search:uri>
    </search:collection-query>
    <search:collection-query>
        <search:uri>TSJN</search:uri>
    </search:collection-query>
</search:and-query>
</search:query>

When multiple collections are passed to a single fn:collection() or cts:collection-query() call, the collections are OR related. To get the equivalent, provide the following query:

<search:query>
<search:collection-query>
    <search:uri>GEWN</search:uri>
    <search:uri>TSJN</search:uri>
</search:collection-query>
</search:query>

Here's the reference for the collection query in JSON:

http://docs.marklogic.com/guide/search-dev/structured-query#id_76890

Hoping that helps,

Upvotes: 2

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