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felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

2007-Dec-10 02:20 UTC

Reading Hash/Array

Hi all,

My app is generating a form with several bill_items that should be
updated (fields to be updated are description and net).

The text_field_tag names are bill_item[update][#{id}][description] and
bill_item[update][#{id}][net] (and I added bill_item[update][#{id}]
[id] just in case)

The param received is:

{"commit"=>"Save",
 "authenticity_token"=>"6184e60b9928fadecbdf3713ffcf770a2402c8c2",
 "bill_item"=>{"update"=>{"1"=>{"id"=>"1",
                                              
"description"=>"Daily
monitoring",
                                              
"net"=>"1:00"},
                                     
"2"=>{"id"=>"2",
 
"description"=>"Development",
                                              
"net"=>"3:00"}
                                     }
                    },
 "id"=>"1"}

How can I read/process this data?

I am trying to do something like

params[:bill_item][:update].each do |item|
  bill_item = BillItem.find(item[id])
  bill_item.description = item[description]
  bill_item.net = item[net]
  bill_item.save
end

but of course the access to the hash is not correct.
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Ryan Bigg

2007-Dec-10 02:55 UTC

head link

Re: Reading Hash/Array

How you''re accessing the variable keys is wrong:

> params[:bill_item][:update].each do |item|
>  bill_item = BillItem.find(item[id])
>  bill_item.description = item[description]
>  bill_item.net = item[net]
>  bill_item.save
> end
>
This should be item["id"], item["description"] and
item["net"] in that
order. If you don''t make them strings Ruby will think they are local
variables/methods and ruby will attempt to interpret them this way.

That''s probably why you''re getting an "undefined local
variable or method
''id''" error message.


-- 
Ryan Bigg
http://www.frozenplague.net

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felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

2007-Dec-10 03:01 UTC

head link

Re: Reading Hash/Array

I know that item[id] is not correct, thats why I said that the access
to the hash is incorrect (I should have been more specific), it was
just to give you and idea of what I wanted.

If I try to item["id"] rails tells me "can''t convert
String into
Integer".

On Dec 9, 6:55 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> How you''re accessing the variable keys is wrong:
>
> > params[:bill_item][:update].each do |item|
> >  bill_item = BillItem.find(item[id])
> >  bill_item.description = item[description]
> >  bill_item.net = item[net]
> >  bill_item.save
> > end
>
> This should be item["id"], item["description"] and
item["net"] in that
> order. If you don''t make them strings Ruby will think they are
local
> variables/methods and ruby will attempt to interpret them this way.
>
> That''s probably why you''re getting an "undefined
local variable or method
> ''id''" error message.
>
> --
> Ryan Bigghttp://www.frozenplague.net--~--~---------~--~----~------------~-------~--~----~
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felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

2007-Dec-10 03:06 UTC

head link

Re: Reading Hash/Array

And if I try to use item["id"].to_i, the error reported remains the
same.

On Dec 9, 7:01 pm, "felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
<felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> I know that item[id] is not correct, thats why I said that the access
> to the hash is incorrect (I should have been more specific), it was
> just to give you and idea of what I wanted.
>
> If I try to item["id"] rails tells me "can''t
convert String into
> Integer".
>
> On Dec 9, 6:55 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > How you''re accessing the variable keys is wrong:
>
> > > params[:bill_item][:update].each do |item|
> > >  bill_item = BillItem.find(item[id])
> > >  bill_item.description = item[description]
> > >  bill_item.net = item[net]
> > >  bill_item.save
> > > end
>
> > This should be item["id"], item["description"] and
item["net"] in that
> > order. If you don''t make them strings Ruby will think they
are local
> > variables/methods and ruby will attempt to interpret them this way.
>
> > That''s probably why you''re getting an
"undefined local variable or method
> > ''id''" error message.
>
> > --
> > Ryan Bigghttp://www.frozenplague.net--~--~---------~--~----~------------~-------~--~----~
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Ryan Bigg

2007-Dec-10 03:07 UTC

head link

Re: Reading Hash/Array

Try item["id"].to_i

On Dec 10, 2007 1:31 PM, felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> I know that item[id] is not correct, thats why I said that the access
> to the hash is incorrect (I should have been more specific), it was
> just to give you and idea of what I wanted.
>
> If I try to item["id"] rails tells me "can''t
convert String into
> Integer".
>
> On Dec 9, 6:55 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > How you''re accessing the variable keys is wrong:
> >
> > > params[:bill_item][:update].each do |item|
> > >  bill_item = BillItem.find(item[id])
> > >  bill_item.description = item[description]
> > >  bill_item.net = item[net]
> > >  bill_item.save
> > > end
> >
> > This should be item["id"], item["description"] and
item["net"] in that
> > order. If you don''t make them strings Ruby will think they
are local
> > variables/methods and ruby will attempt to interpret them this way.
> >
> > That''s probably why you''re getting an
"undefined local variable or
> method
> > ''id''" error message.
> >
> > --
> > Ryan Bigghttp://www.frozenplague.net
> >
>

-- 
Ryan Bigg
http://www.frozenplague.net

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Ryan Bigg

2007-Dec-10 03:08 UTC

head link

Re: Reading Hash/Array

Can you give us a backtrace of the error and the relevant code please? (the
whole action if necessary)

On Dec 10, 2007 1:36 PM, felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> And if I try to use item["id"].to_i, the error reported remains
the
> same.
>
> On Dec 9, 7:01 pm,
"felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
<felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > I know that item[id] is not correct, thats why I said that the access
> > to the hash is incorrect (I should have been more specific), it was
> > just to give you and idea of what I wanted.
> >
> > If I try to item["id"] rails tells me "can''t
convert String into
> > Integer".
> >
> > On Dec 9, 6:55 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >
> > > How you''re accessing the variable keys is wrong:
> >
> > > > params[:bill_item][:update].each do |item|
> > > >  bill_item = BillItem.find(item[id])
> > > >  bill_item.description = item[description]
> > > >  bill_item.net = item[net]
> > > >  bill_item.save
> > > > end
> >
> > > This should be item["id"],
item["description"] and item["net"] in that
> > > order. If you don''t make them strings Ruby will think
they are local
> > > variables/methods and ruby will attempt to interpret them this
way.
> >
> > > That''s probably why you''re getting an
"undefined local variable or
> method
> > > ''id''" error message.
> >
> > > --
> > > Ryan Bigghttp://www.frozenplague.net
> >
>

-- 
Ryan Bigg
http://www.frozenplague.net

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felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

2007-Dec-10 03:12 UTC

head link

Re: Reading Hash/Array

def update_data
    unless params[:bill_item].nil? || params[:bill_item][:update].nil?
      params[:bill_item][:update].each do |item|
        bill_item = BillItem.find(item["id"].to_i)
        bill_item.description = item["description"]
        bill_item.net = item["net"]
        bill_item.save
      end
      flash.now[:notice] = ''Item(s) updated''
    else
      flash.now[:warning] = ''No data received''
    end
  end

Error:
can''t convert String into Integer

Trace:
app/controllers/billing_controller.rb:101:in `[]''
app/controllers/billing_controller.rb:101:in `update_data''
app/controllers/billing_controller.rb:100:in `each''
app/controllers/billing_controller.rb:100:in `update_data''
app/controllers/billing_controller.rb:63:in `update_items''
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/
base.rb:1168:in `send''
(...)

Parameters:
{"commit"=>"Save",
 "authenticity_token"=>"6184e60b9928fadecbdf3713ffcf770a2402c8c2",
 "bill_item"=>{
   "update"=>{
     "1"=>{
       "id"=>"1",
       "description"=>"Daily monitoring",
       "net"=>"1:00"},
     "2"=>{
       "id"=>"2",
       "description"=>"Development",
       "net"=>"3:00"}
     }
 },
 "id"=>"1"}

On Dec 9, 7:08 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Can you give us a backtrace of the error and the relevant code please? (the
> whole action if necessary)
>
> On Dec 10, 2007 1:36 PM, felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
>
>
> > And if I try to use item["id"].to_i, the error reported
remains the
> > same.
>
> > On Dec 9, 7:01 pm,
"felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org"
<felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > I know that item[id] is not correct, thats why I said that the
access
> > > to the hash is incorrect (I should have been more specific), it
was
> > > just to give you and idea of what I wanted.
>
> > > If I try to item["id"] rails tells me
"can''t convert String into
> > > Integer".
>
> > > On Dec 9, 6:55 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > > How you''re accessing the variable keys is wrong:
>
> > > > > params[:bill_item][:update].each do |item|
> > > > >  bill_item = BillItem.find(item[id])
> > > > >  bill_item.description = item[description]
> > > > >  bill_item.net = item[net]
> > > > >  bill_item.save
> > > > > end
>
> > > > This should be item["id"],
item["description"] and item["net"] in that
> > > > order. If you don''t make them strings Ruby will
think they are local
> > > > variables/methods and ruby will attempt to interpret them
this way.
>
> > > > That''s probably why you''re getting an
"undefined local variable or
> > method
> > > > ''id''" error message.
>
> > > > --
> > > > Ryan Bigghttp://www.frozenplague.net
>
> --
> Ryan Bigghttp://www.frozenplague.net--~--~---------~--~----~------------~-------~--~----~
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Ryan Bigg

2007-Dec-10 03:20 UTC

head link

Re: Reading Hash/Array

Not a clue. I''m guessing 101 is the item["id"].to_i line?
That should be
working.

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felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

2007-Dec-10 03:22 UTC

head link

Re: Reading Hash/Array

Yes, 101 is the find.

If I try to use item = item.to_hash inside the do block, I get:

undefined method `to_hash'' for #<Array:0x364a0e8>

This tells me that it is an array. But why the hell I''m not being able
to access its values? not even with item[1], item[2] etc.

How can I add something like debug(item) to the log so that I can see
it''s structure?

Thanks for all the help Ryan.

On Dec 9, 7:20 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Not a clue. I''m guessing 101 is the item["id"].to_i
line? That should be
> working.--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
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Ryan Bigg

2007-Dec-10 03:38 UTC

head link

Re: Reading Hash/Array

item is an array? I thought it would be a hash.

Try doing a puts item.inspect in your code

On Dec 10, 2007 1:52 PM, felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> Yes, 101 is the find.
>
> If I try to use item = item.to_hash inside the do block, I get:
>
> undefined method `to_hash'' for #<Array:0x364a0e8>
>
> This tells me that it is an array. But why the hell I''m not being
able
> to access its values? not even with item[1], item[2] etc.
>
> How can I add something like debug(item) to the log so that I can see
> it''s structure?
>
> Thanks for all the help Ryan.
>
> On Dec 9, 7:20 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > Not a clue. I''m guessing 101 is the item["id"].to_i
line? That should be
> > working.
> >
>

-- 
Ryan Bigg
http://www.frozenplague.net

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felipekk-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

2007-Dec-10 04:04 UTC

head link

Re: Reading Hash/Array

Fixed it.

I used item[0], item[1] and item[2] to access the array. But when I
did this, I noticed that the description (= item[1]) was receiving: !
map:HashWithIndifferentAccess (...) so actualy item[1] was returning a
hash instead of the description. Then I understood how rails was
(correctly) interpreting the whole params[:bill_item].
[:update] was an array, with the key being the id of the field, and
the value being the hash with the params that I sent (id, description,
net)

So this is the correct/working code:

params[:bill_item][:update].each do |key, value|
        bill_item = BillItem.find(key.to_i)
        bill_item.description = value[:description]
        bill_item.net = value[:net]
        bill_item.save
end

Again, thanks for your help Ryan!

On Dec 9, 7:38 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> item is an array? I thought it would be a hash.
>
> Try doing a puts item.inspect in your code
>
> On Dec 10, 2007 1:52 PM, felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<felip...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
>
>
> > Yes, 101 is the find.
>
> > If I try to use item = item.to_hash inside the do block, I get:
>
> > undefined method `to_hash'' for #<Array:0x364a0e8>
>
> > This tells me that it is an array. But why the hell I''m not
being able
> > to access its values? not even with item[1], item[2] etc.
>
> > How can I add something like debug(item) to the log so that I can see
> > it''s structure?
>
> > Thanks for all the help Ryan.
>
> > On Dec 9, 7:20 pm, "Ryan Bigg"
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > > Not a clue. I''m guessing 101 is the
item["id"].to_i line? That should be
> > > working.
>
> --
> Ryan Bigghttp://www.frozenplague.net--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
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