Ok then, as an example what does the code mean below def encrypt_password self.encrypted_password = encrypt(self.password) end
Best Regards Rushen On Jan 18, 1:07 pm, Frederick Cheung <[email protected]> wrote: > On Jan 18, 9:34 am, Rushen Aly <[email protected]> wrote: > > > Thank you for your reply, > > As i understand i always need to use self in spite of @ in a model > > Not always, but sometimes you need to in order to resolve an ambiguity > eg, if you have a local variable called foo and an accessor method > called foo and you write > > foo > > then ruby needs to decide whether you wanted to call the method foo or > just get the local variable. self.foo or foo() tells ruby you wanted > to call the acessor method > > if you write foo=123, ruby will always assume you wanted to set the > local variable foo, so you need to write self.foo = 123 > > Fred > > > > > > > > > file. I have no information about mass assignment so i am searching > > for it... > > Best Regards... > > Rushen > > > On Jan 18, 9:19 am, Frederick Cheung <[email protected]> > > wrote: > > > > On Jan 18, 6:50 am, Rushen Aly <[email protected]> wrote: > > > > > Hi everybody, > > > > > I am studying Ruby on Rails Tutorial: Learn Rails by Example at > > > > railstutorial.org and currently i am studying chapter 7. There are > > > > some issues make me confused. It will be great if you help me on these > > > > issues. > > > > > 1). We are creating virtual attributes via attr_accessor and making it > > > > accessible via attr_accessible. Is this statement correct? I mean if > > > > we create a virtual attribute via attr_accessor cant we use it > > > > without declaring it with attr_accessible? > > > > virtual attributes don't differ from normal attributes when it comes > > > to attr_accessible: if you've gone the whitelist approach (ie you've > > > used attr_accessible elsewhere), then attributes (virtual or not) are > > > protected from mass assignment unless you call attr_accessible on > > > them. > > > > > 2). What is the difference between self.variable and @variable? Is it > > > > something like that we are using self.variable for variables not > > > > mentioned in attr_accesible and @variable for variables mentioned in > > > > attr_accesible. Is that true? > > > > self.variable calls the method called variable (which may or may not > > > be backed by an instance variable), whereas @variable access the > > > instance variable of that named directly. @variable won't work for an > > > active record attribute, since those aren't stored in individual > > > instance variables (AR stores a hash of all the database attributes in > > > one place( > > > > Fred > > > > > Best regards... > > > > Rushen -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
