On Wednesday, January 2, 2013 4:07:42 PM UTC-8, rohit wrote:
>
> On Tuesday, January 4, 2011 6:58:31 PM UTC-6, Jeremy Evans wrote:
>
>> class Proc
>> def sql_literal(ds)
>> ds.literal(Sequel.virtual_row(&self))
>> end
>> end
>>
>> Jeremy
>
>
> Hi Jeremy,
>
> This nice solution does not work in Ruby 1.9.3
>
> ArgumentError: wrong number of arguments (1 for 0)
> from
> /home/rohit/.rvm/gems/ruby-1.9.3-p362/gems/sequel-3.42.0/lib/sequel/core.rb:395:in
>
> `instance_eval'
> from
> /home/rohit/.rvm/gems/ruby-1.9.3-p362/gems/sequel-3.42.0/lib/sequel/core.rb:395:in
>
> `virtual_row'
> from
> /home/rohit/.rvm/gems/ruby-1.9.3-p362/gems/sequel-3.42.0/lib/sequel/dataset/query.rb:1147:in
>
> `virtual_row_columns'
> from
> /home/rohit/.rvm/gems/ruby-1.9.3-p362/gems/sequel-3.42.0/lib/sequel/dataset/query.rb:779:in
>
> `select'
>
> Can be made to work by changing lambda to Proc.new. Is there a better way?
>
You can use a regular proc instead of a lambda proc, or you can use
lambda{|*a|} so that the lambda accepts an argument. You could also use a
lambda with a single argument, but then you can't use the instance_eval
virtual row form.
I think it is possible to make your code work directly in Sequel using
instance_exec instead of instance_eval. Now that we no longer support ruby
1.8.6, we can make that switch. I'll add that to my todo list.
Thanks,
Jeremy
Don't use a lambda? You could optionally use a lambda that accepts an
argument, but th
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