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NSFetchRequest fetch properties only
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| let searchTermPropertyName = "term" | |
| let searchFetchRequest = NSFetchRequest(entityName: SearchEntity.className) | |
| searchFetchRequest.propertiesToFetch = [searchTermPropertyName] | |
| searchFetchRequest.resultType = .DictionaryResultType | |
| let allSearches = try! privateContext.executeFetchRequest(searchFetchRequest) as! [[String: String]] | |
| let allSearchTerms = allSearches.flatMap {$0[searchTermPropertyName]} |
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