MongoDB模糊查詢，以及MongoDB模糊查詢時帶有括號的情況

模糊查詢

記錄如下：

{
    "_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"
}

　　

查詢name以fuc開頭的：

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

　

結果如下：

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

　　

模糊查詢中帶有括號的，重點是將括號用反斜杠"\"進行轉義：

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

　　

這樣就能模糊查詢出帶有括號的記錄了：

{
    "_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"
}