Issue Decoding Blank Values

[deankarn]

Situation

Have a user struct, populated via a database query that includes a LastName field already populated
We have a user update HTML form which posts the updates.

Issue

When LastName, or other fields, are set to blank in the HTML input the form posts the following:

map[IsActive:[true] FirstName:[Joey] LastName:[] PreferredFirstName:[Joey] Username:[joeybloggs]]

this is correct as you can see LastName has no value; however after running schema decoder like so:

// user originally grabbed from DB in middleware and set on context ( using gorilla contaxt )
user := context.Get(r, "user").(*User)

if err = schemaDecoder.Decode(user, r.MultipartForm.Value); err != nil {
  log.Println(err.Error())
  http.Error(w, "Invalid Request", http.StatusBadRequest)
  return
}

fmt.Println(user.LastName) // outputs Bloggs, the fields original value

LastName was not set to blank and still retains it's original value.

My specific problem

the user struct is validated after schema decoder runs and in this situation validation should report an error, however it all passes, user gets saved to the database and user is notified that the user saved successfully.

Notes

This is not the same issue as #17 as I don't want to zero out fields not posted.

[kisielk]

I think the option in #17 should do what you need. It doesn't deal with fields not posted, but fields which were posted but had an empty value.

[deankarn]

OK sorry I must have misread, will set the flag and confirm in the morning

Thanks!

[deankarn]

Confirmed this solves the problem, Thanks!