updateAll is the way to go...
eg. $this->Post->updateAll(array('options'=>value2),array('id <>
'=>'$var));
reducing the number of transactions in this case from n(Posts) to just
2 - one for the matching record and one for all the rest.

On Aug 21, 8:45 pm, brian <[email protected]> wrote:
> Almost, but $value_2 will never be assigned. Perhaps the OP could shed
> some light on the bigger picture as there may be a better way to
> approach this.
>
> On Fri, Aug 21, 2009 at 5:07 AM, rich...@home<[email protected]> wrote:
>
> > You don't need the else branch in the 2nd example, its taken care of
> > in the read:
>
> > // fetch back the record with an id of $var
> > $post = $this->Post->read(null, $var);
>
> > // update the record
> > $post['Post']['options'] = value1;
>
> > // save the record
> > $this->Post->save($post);
>
> > In the first example, you fetch back a number of records and loop
> > through them looking for one with an id of $var. It's quite likely
> > that id will be unique (its should be a primary key) so there's no
> > need for the loop.
>
> > On Aug 20, 5:21 pm, albe <[email protected]> wrote:
> >> foreach($posts as $p) {
>
> >>         if ($p['Post']['id'] == $var) {
> >>           $p['Post']['options'] = value1;
> >>         } else {
> >>           $p['Post']['options'] = value 2;
> >>         }
> >>         $this->Post->save($p);
>
> >> }
>
> >> This works! I just can't say how much I am grateful for your help!
> >> However I still don't understand why my code was wrong...
>
> >> About your second way:
>
> >> $post = $this->Post->read(null, $var);
> >> $post['Post']['options'] = value1;
> >> $this->Post->save($post);
>
> >> If I use this, where shall i put the ELSE branch?
>
> >> On 20 Ago, 18:00, "rich...@home" <[email protected]> wrote:
>
> >> > Shouldn't that be:
>
> >> > foreach($posts as $p) {
>
> >> >         if ($p['Post']['id'] == $var) {
> >> >           $p['Post']['options'] = value1;
> >> >         } else {
> >> >           $p['Post']['options'] = value 2;
> >> >         }
> >> >         $this->Post->save($p);
>
> >> > }
>
> >> > also, if you are just matching against the id, you could just write it
> >> > as:
>
> >> > $post = $this->Post->read(null, $var);
> >> > $post['Post']['options'] = value1;
> >> > $this->Post->save($post);
>
> >> > and forget about the loop
>
> >> > On Aug 20, 3:26 pm, AD7six <[email protected]> wrote:
>
> >> > > On 20 ago, 15:39, albe <[email protected]> wrote:
>
> >> > > > I have to make a foreach cycle to check every item of a certain 
> >> > > > group.
> >> > > > For each and every item I've got to check a condition and make a data
> >> > > > modification depending on this condition.
> >> > > > My code is the following:
>
> >> > > > foreach($posts as $p) {
>
> >> > > >         $this->Post->id = $p['Post']['id']; //consider the posts one
> >> > > > by one
>
> >> > > >         if ($this->Post->id == $var) {
> >> > > >           $this->data['Post']['options'] = value1;
> >> > > >         } else {
> >> > > >           $this->data['Post']['options'] = value 2;
> >> > > >         }
>
> >> > > >         $this->Post->save($this->data);
>
> >> > > > }
>
> >> > > > Here is my problem: the modifications are performed correctly for the
> >> > > > IF branch, but NEVER for the else branch.
> >> > > > Do you know why this occurs?
>
> >> > > aliens?
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