Major - P3 Description
Currently we do not allow users to insert non-geo data (for example, a string) into a field that has a geo index on it. Here is an example:
> db.test.ensureIndex({a: '2dsphere'})
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{
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"createdCollectionAutomatically" : false,
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"numIndexesBefore" : 1,
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"numIndexesAfter" : 2,
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"ok" : 1
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}
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> db.test.remove({})
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WriteResult({ "nRemoved" : 0 })
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> db.test.insert({_id: 0, a: "this is not a test"})
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WriteResult({
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"nInserted" : 0,
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"writeError" : {
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"code" : 16755,
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"errmsg" : "insertDocument :: caused by :: 16755 Can't extract geo keys: { _id: 0.0, a: \"this is not a test\" } geo element must be an array or object: a: \"this is not a test\""
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}
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})
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I could not find this limitation documented anywhere. We should make this clear to the users as it is a fairly major limitations of geo indexes.