Golang Cannot Convert (type *string) to type string

Question

When I tried to compile the following code I get following errors:

users.go:31: cannot convert pass (type *string) to type string

users.go:78: cannot convert &user.Password (type *string) to type []byte

How do I dereference or convert the pointer to the string literal?

Thanks in advance.

code which I am trying to compile: https://play.golang.org/p/gtMKLNAyNk

Can you also post the exact lines that are giving you issues in addition to your snippet. The lines don't match up so it's hard to know where the issue is. — shieldstroy
– shieldstroy, Commented Jan 13, 2017 at 17:54
Also add the models.User struct definition to your snippet, might be helpful — shieldstroy
– shieldstroy, Commented Jan 13, 2017 at 17:55
@shieldstroy here you go gist.github.com/itsbalamurali/e46d10acdceda906925d0e4836e9023f — itsbalamurali
– itsbalamurali, Commented Jan 13, 2017 at 17:57
You keep unnecessarily taking the address of things in that code. Hint, &user.Username will never be nil. — Mr_Pink
– Mr_Pink, Commented Jan 13, 2017 at 17:59

shieldstroy · Accepted Answer · 2017-01-13 18:01:32Z

6

The if on line 9 needs to change I think. user.Username and user.Password are strings so they will never be nil. What you need to check instead is for empty string like this: if user.Username != "" && user.Password != "" {

pass := &user.Password password := []byte(*pass)

Don't take the address of user.Password. Just use password := []byte(user.Password)

Basically all of your issues are variations on that theme.

Start fixing this issue by removing all & and * from your code and it will probably work (except for this one: ctx.Get("database").(*gorm.DB))

answered Jan 13, 2017 at 18:01

shieldstroy

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shieldstroy Over a year ago

No problem. Good luck! In general you can not worry too much about pointers until the compiler tells you that you need to. That's not entirely true but you'll get the hang of it.

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