func main() {
str1 := "aaaaaaaaaaaaaaaaaaaaaaraaaaaaaaaaaaaa"
str2 :
= "bbbbbbbbbbbbbbbbbbbbbbbbbhbbbbbbbbbbb"
str3 :
= "xxxxxxxxxxxxxxxxxxxxx"
session, err :
= mgo.Dial("localhost:27017"
)
if
err !=
nil {
panic(err)
defer session.Close()
c :
= session.DB("lsoa").C("users"
)
c.DropCollection()
for
i := 0; i < 10; i++
{
if
i%2 == 0
{
err
= c.Insert(&User{fmt.Sprintf("cst%d"
, i), str1, time.Now()})
}
else
{
err
= c.Insert(&User{fmt.Sprintf("est%d"
, i), str2, time.Now()})
err
= c.Insert(&User{fmt.Sprintf("cest%d", 12
), str3, time.Now()})
ac, err :
=
c.Find(bson.M{}).Count()
//
第一种写法
//
query :=bson.M{"$or":[]bson.M{bson.M{"name": bson.M{"$regex": bson.RegEx{"ce", "i"}}},
//
bson.M{"key": bson.M{"$regex": bson.RegEx{"x", "i"}}}}}
//第二种写法
regex1 := bson.RegEx{"ce", "i"
}
regex2 :
= bson.RegEx{"x", "i"
}
query :
= bson.M{"$or": []bson.M{bson.M{"name": regex1}, bson.M{"key": regex2}}}
fmt.Println(query)
count, err := c.Find(query).Count()
fmt.Printf("All Count: %d ,Filter count:%d", ac, count)
}
