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POMongo query inside Hashmap with unknown hash key
 

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    <p><strong>Platform:</strong> MongoDB, Spring, SpringDataMongoDB</p> <p>I have a collection called "Encounter" with below structure</p> <p>Encounter:</p> <pre><code>{ "_id" : "49a0515b-e020-4e0d-aa6c-6f96bb867288", "_class" : "com.keype.hawk.health.emr.api.transaction.model.Encounter", "encounterTypeId" : "c4f657f0-015d-4b02-a216-f3beba2c64be", "visitId" : "8b4c48c6-d969-4926-8b8f-05d2f58491ae", "status" : "ACTIVE", "form" : { "_id" : "be3cddc5-4cec-4ce5-8592-72f1d7a0f093", "formCode" : "CBC", "fields" : { "dc" : { "label" : "DC", "name" : "tc", }, "tc" : { "label" : "TC", "name" : "tc", }, "notes" : { "label" : "Notes", "name" : "notes", } }, "notes" : "Blood Test", "dateCreated" : NumberLong("1376916746564"), "dateModified" : NumberLong("1376916746564"), "staffCreated" : 10013, "staffModified" : 10013 }, } </code></pre> <p>The element "<code>fields</code>" is represented using a Java Hashmap as:</p> <pre><code>protected LinkedHashMap&lt;String, Field&gt; fields; </code></pre> <p>The Key to the hashmap () is not fixed, but generated at run time.</p> <p>How do I query to get all documents in the collection where "label" = "TC"?</p> <p>It's not possible to query like <code>db.encounter.find({'form.fields.dc.label':'TC'})</code> because the element name 'dc' is NOT known. I want to skip that postion and the execute query, something like:</p> <pre><code>db.encounter.find({'form.fields.*.label':'TC'}); </code></pre> <p>Any ideas?</p> <p>Also, how do I best use indexes in this scenario?</p>
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    1. USFirdous Amir
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      1. VTUpMod
    1. COUnfortunately your schema is at a disadvantage here since there is no easy way to do that, you would need to make `fields` an array of objects
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      1. USSammaye
    2. COThanks. I'm getting it and moving in the direction you advised.
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      1. USFirdous Amir
 

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