NoMethodError (undefined method `[]' for nil:NilClass)

Rails
1

Hi everyone this is the error that’s been killing me, please tell
where i am missing.
I have upgraded my rails version from 1.2.3 to 2.3.2 and have
installed active_scaffold plugin, since then this error started which
was not there in older version.

This is the log output:

Processing AccountController#consumer_home (for 122.167.8.236 at
2009-07-31 09:02:22) [GET]

NoMethodError (undefined method []' for nil:NilClass): app/controllers/account_controller.rb:566:inpaginate_by_sql’
app/controllers/account_controller.rb:623:in `consumer_home’
Rendering /home/v8354a/public_html/projectbidding/public/500.html (500
Internal Server Error)

I have paginate_by_sql function in application_controller.rb file
which is shown below will call Paginator class.

def paginate_by_sql(model, sql, per_page, options={})
if options[:count]
if options[:count].is_a? Integer
total = options[:count]
else
total = model.count_by_sql(options[:count])
end
else
total = model.count_by_sql_wrapping_select_query(sql)
end
object_pages = Paginator.new self, total, per_page, @params
[‘page’]
objects = model.find_by_sql_with_limit(sql,
object_pages.current.to_sql[1], per_page)
return [object_pages, objects]
end

Please help

2

2009/7/31 seenu [email protected]:

2009-07-31 09:02:22) [GET]
def paginate_by_sql(model, sql, per_page, options={})
[‘page’]
      objects = model.find_by_sql_with_limit(sql,
object_pages.current.to_sql[1], per_page)
      return [object_pages, objects]
    end

You have not told us which is line 566 which is where the error is.
Looking at the code though I guess it is one of the lines containing
options[:count] or maybe @params[‘page’]. The error is undefined
method `[]’ for nil:NilClass which would suggest that maybe options or
params is not set. If you can’t see the problem by inspecting the
code you could try using ruby-debug to break in at the appropriate
point and have a look at what is going on. The rails guide on
testing applications is good.

Colin

3

this is the call i am making on line 566:
@auction_pages = paginate_by_sql (Auction, auctions_query, 10, ‘’)

4

2009/7/31 seenu [email protected]:

this is the call i am making on line 566:
@auction_pages = paginate_by_sql (Auction, auctions_query, 10, ‘’)

Are you sure? From the trace I would have expected line 566 of
account_controller.rb to have been in the function paginate_by_sql and
the call to paginate_by_sql to be at line 623 (in consumer_home).

Whatever the answer to that however, I suggest you have a look at the
last parameter of the call, is that an empty string? The function
appears to be expecting a hash. Though I am not sure whether that
would give the error seen.

Did you try using the debugger?

By the way I believe that top posting is rather frowned on in this list.

Colin