> db.user.getIndexes()
[
        {
                "v" : 1,
                "key" : {
                        "_id" : 1
                },
                "name" : "_id_",
                "ns" : "project1.user"
        },
        {
                "v" : 1,
                "unique" : true,
                "key" : {
                        "sipline_ref" : 1,
                        "company_ref" : 1
                },
                "name" : "sipline_ref_1_company_ref_1",
                "ns" : "project1.user",
                "sparse" : false,
                "background" : false
        }
]