MongoDB模糊查询，以及MongoDB模糊查询时带有括号的情况

模糊查询

记录如下：

{
    "_id" : ObjectId("5c3d486d24aa9a000526367b"),
    "name" : "fuc"
}
{
    "_id" : ObjectId("5c3d486d24aa9a000526367b"),
    "name" : "fuc_1"
}
{
    "_id" : ObjectId("5c3d486d24aa9a001526367b"),
    "name" : "fuc_2"
}
{
    "_id" : ObjectId("5c469cd27353b40005bcb67b"),
    "name" : "map (2)_2"
}
{
    "_id" : ObjectId("5c469cd27353b40005bcb67c"),
    "name" : "map (2)_3"
}
{
    "_id" : ObjectId("5c469cd37353b40005bcb67d"),
    "name" : "map (2)_4"
}
{
    "_id" : ObjectId("5c469cd37353b40005bcb67e"),
    "name" : "map (2)_5"
}

　　

查询name以fuc开头的：

db.getCollection('maps').find({"name" :{$regex: /fuc/}})

　

结果如下：

{
    "_id" : ObjectId("5c3d486d24aa9a000526367b"),
    "name" : "fuc"
}
{
    "_id" : ObjectId("5c3d486d24aa9a000526367b"),
    "name" : "fuc_1"
}
{
    "_id" : ObjectId("5c3d486d24aa9a001526367b"),
    "name" : "fuc_2"
}

　　

模糊查询中带有括号的，重点是将括号用反斜杠"\"进行转义：

db.getCollection('maps').find({"name" :{$regex: /map \(2\)/}})

　　

这样就能模糊查询出带有括号的记录了：

{
    "_id" : ObjectId("5c469cd27353b40005bcb67b"),
    "name" : "map (2)_2"
}
{
    "_id" : ObjectId("5c469cd27353b40005bcb67c"),
    "name" : "map (2)_3"
}
{
    "_id" : ObjectId("5c469cd37353b40005bcb67d"),
    "name" : "map (2)_4"
}
{
    "_id" : ObjectId("5c469cd37353b40005bcb67e"),
    "name" : "map (2)_5"
}