Rails - Jul 2006 - form and pagination question

Hello,

How do I get params from a form to use with a paginator?

debug(params) shows this
city: !map:HashWithIndifferentAccess
  id: "1"

but in my controller, when I try to use
@hotel_pages = Paginator.new self, Hotel.count(:conditions =>
"hotels.city_id = params[:city][:id]"), 3,
@params[''page'']

it doesn''t work. I suppose it''s a simple syntax error but have
no idea
to fix it.

Thanks for your help!

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> @hotel_pages = Paginator.new self, Hotel.count(:conditions =>
> "hotels.city_id = params[:city][:id]"), 3,
@params[''page'']
@hotel_pages, @hotels = paginate(:hotels, :conditions =>
["hotels.city_id = ?", params[:city][:id]], :per_page => 3, :page
=>
@params[''page''])

Try something like that.

-- 
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> but in my controller, when I try to use
> @hotel_pages = Paginator.new self, Hotel.count(:conditions =>
> "hotels.city_id = params[:city][:id]"), 3,
@params[''page'']
> 
> it doesn''t work. I suppose it''s a simple syntax error but
have no idea
> to fix it.

Nobody?

-- 
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> but in my controller, when I try to use
> @hotel_pages = Paginator.new self, Hotel.count(:conditions =>
> "hotels.city_id = params[:city][:id]"), 3,
@params[''page'']

Nobody?

-- 
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> @hotel_pages, @hotels = paginate(:hotels, :conditions =>
> ["hotels.city_id = ?", params[:city][:id]], :per_page => 3,
:page =>
> @params[''page''])
> 
> Try something like that.

Thanks Dr Nic, I replaced :page => @params[''page''] by
:parameter =>
''page'' and it works but only for the first page, then I have
an error
You might have expected an instance of Array.
The error occured while evaluating nil.[]

Any idea?

-- 
Posted via http://www.ruby-forum.com/.

> Thanks Dr Nic, I replaced :page => @params[''page''] by
:parameter =>
> ''page'' and it works but only for the first page, then I
have an error
> You might have expected an instance of Array.
> The error occured while evaluating nil.[]
Try :parameter => params[:page]

-- 
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> Try :parameter => params[:page]
In fact, I think it''s more a hash problem in the link previous / next.

I found that in the archives:

"To get a hash through in an url like that you need to serialize it
and deserialize it. Something like this:"

#in your application controller somewhere:

require ''base64''
def construct_for_link(object)
    Base64.encode64(Marshal.dump(object))
end
helper_method : construct_for_link

def deconstruct_from_link(object)
   Marshal.load(Base64.decode64(object))
end
helper_method :deconstruct_from_link


# then in your view
<%= link_to(''next'', {:params =>
params.merge(''answer'' =>
construct_for_link(@answer),
	''page'' => object_pages.current.previous,)}) + ''
'' if
object_pages.current.previous %>

# in controller
   answer = deconstruct_from_link(params[:answer])


So the question is: is it the only way to add an hash in a link?

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