How Select just some columns?

Rails
1

Hi,

if I do:
user = User.find :all
render :xml => user.to_xml

I obviously get the user records whith ALL the columns (name, surname,
tel, email, …)

How I can get just the column email (for example) ?

ps.

I wan’t to use User.find_by_sql(‘Select mail from users’)

thanks

2

On Apr 7, 10:54 am, Ale Ds [email protected] wrote:

Hi,

if I do:
user = User.find :all
render :xml => user.to_xml

I obviously get the user records whith ALL the columns (name, surname,
tel, email, …)

depending on what you’re doing, either use the :select option on the
call to find or the :only/:except options on to_xml may be what you
want.

Fred

3

‘:select’ is perfect:

users = User.find(:all, :select = ‘email’)

I overlooked it in RoR api.
Thank you !

Alessandro

Frederick C. wrote:

On Apr 7, 10:54�am, Ale Ds [email protected] wrote:

Hi,

if I do:
user = User.find :all
render :xml => user.to_xml

I obviously get the user records whith ALL the columns (name, surname,
tel, email, …)

depending on what you’re doing, either use the :select option on the
call to find or the :only/:except options on to_xml may be what you
want.

Fred