func CheckIndex(c *mgo.Collection, key []string, unique bool) error {
originIndexs, err := c.Indexes()
if err != nil {
return fmt.Errorf("<CheckIndex> get indexes: %v", err)
}
for _, index := range originIndexs {
if checkIndexKey(index.Key, key) && unique == index.Unique {
return nil
}
}
return fmt.Errorf("<CheckIndex> not found index: %v unique: %v", key, unique)
}
