Activerecord result set count

Rails
1

Hello all,

Can anyone clear this up for me?..

Example: 1 table, 1 record in table

result = Stuff.find(:all)

result.size

=> 1

result = Stuff.find(1)

result.size

NoMethodError: undefined method `size’…blah blah

result = Stuff.find(:all, :conditions => ‘id =1’)

result.size

=> 1

…I’m having troubles understanding this relationship (unless it’s a
bug?) and it’s making it very frustrating if I want to use the same
view to show a single or many records. I can get around it by using
the :conditions as stated above but should I have to? Using…

result.count

NoMethodError: undefined method `count’…blah blah

…seems to have the same issues.

Can anyone shed some light on this? Sorry if it’s already been
covered somewhere else I didn’t know how to exactly phrase my question
without having to read through a hundred posts.

Thanks!

2

Hi,

Model.find(:all) will return an array of results, even if there is only
one matching record.

So, in your example:

result = Stuff.find(:all, :conditions => ‘id =1’)

Here, result is actually an array of 1 item.

The ‘size’ method is a method of the Array class in ruby, and will only
work when the Model.find call returns an array.

So, as in your example again:

result = Stuff.find(1)

Here, result is simply an instance of the ‘Stuff’ class (i.e. the record
with id=1). Therefore the ‘size’ method will not work because it is not
a method of the ‘Stuff’ class.

Hope that helps.

~ Mark

3

Yes!

…it does seem awkward to have to account for this in a separate way
especially when rails is so great in other ways. :slight_smile:

Thank you,

Chris

On Sep 7, 7:10 pm, Mark D. [email protected]