Question: Quick way to check if key exists?

[MikhailKlemin]

Hello! Great wrapper, I accidenlty found it, I think "toolkit" a little bit misleading on go-awesome, but may be it's just me...

If there a short cut to check if a key exists? Without creating a struct and pointer there? I understand it may be not a big deal, but still?

[asdine]

Hello !

Great wrapper, I accidenlty found it, I think "toolkit" a little bit misleading on go-awesome, but may be it's just me...

Yes, thanks for your feedback, it's kinda hard to find an accurate definition

If there a short cut to check if a key exists? Without creating a struct and pointer there?

There is no builtin way to check if a key exists in Bolt or in Storm but there are a few tricks:

Using GetBytes:

_, err := db.GetBytes("YourStruct", "TheKey")
if err == storm.ErrNotFound {
  // doesn't exists
}
...

GetBytes copies the data returned by Bolt so it can be accessible even after the transaction is closed. When testing if a key exists, this copy is unnecessary. Using Bucket, you can directly access the Bolt API:

v := db.Bucket("YourStruct").Get([]byte("YourKey"))
if v == nil {
  // doesn't exists
}
...
...

[MikhailKlemin]

Hello, Thanks a lot, cool trick I will proceed with this :-)