以下查询可以解决问题:
db.collection.distinct("student.personalinfo.name",{"student.personalinfo.name": { $not: /^[\w]+[\w ]*$/ } })
数据集:
{
"_id" : ObjectId("5d77a5babd4e75c58d59821d"),
"student" : {
"personalinfo" : {
"infoid" : "YYY21",
"name" : "test@#!*"
}
}
}
{
"_id" : ObjectId("5d77a5babd4e75c58d59821e"),
"student" : {
"personalinfo" : {
"infoid" : "YYY21",
"name" : "Bruce##"
}
}
}
{
"_id" : ObjectId("5d77a5babd4e75c58d59821f"),
"student" : {
"personalinfo" : {
"infoid" : "YYY21",
"name" : "Tony"
}
}
}
{
"_id" : ObjectId("5d77a5babd4e75c58d598220"),
"student" : {
"personalinfo" : {
"infoid" : "YYY21",
"name" : "Natasha"
}
}
}
输出:
[ "test@#!*", "Bruce##" ]