[MacRuby-devel] Can any kind macruby experts help me get sqlite3 gem working with macruby--please?

[Matt Aimonetti]

the sqlite3 gem uses a native C extension which needs to compiled for your
system. (usually done when installed via rubygems)
The installation will fail if you use macgem, probably due to some IO issues
and the lack of support of C extension.

Someone should look into writing a wrapper for macruby using an obj-c
driver. That can't be that hard and that would be very useful. I've been
thinking about porting the DataObject and the DO SQlite3 driver to MacRuby
but I didn't have time yet (and I didn't really need it either).  DataObject
is the uniform API used by DataMapper to talk to its drivers.
If someone is interested in working on that, I can put him/her in contact
with the DM team.

- Matt



2009/3/31 Tim Rand <timrandg at gmail.com>

> Can any kind macruby experts help me get sqlite3 gem working with macruby?
>
> sqlite3-ruby-1.2.4 ruby gem works in ruby 1.9.0. So I think it should work
> in macruby also...
> From macirb I added the path to the gem:
>
> $: << "path/to/the/sqlite3-ruby-1.2.4/lib"
>
> require 'sqlite3.rb'  # => true
>
> $db = SQLite3::Database.new("/path/to/x.db.rsd")
>
> RuntimeError: *no driver for sqlite3 found*
> the error comes from the load_driver method near line 621 of the
> sqlite3/database.rb file.
>
>    def load_driver( driver )
>       case driver
>         when Class
>           # do nothing--use what was given
>         when Symbol, String
>           require "sqlite3/driver/#{driver.to_s.downcase}/driver"
>           driver = SQLite3::Driver.const_get( driver )::Driver
>         else
>           [ "Native", "DL" ].each do |d|
>             begin
>               require "sqlite3/driver/#{d.downcase}/driver"
>               driver = SQLite3::Driver.const_get( d )::Driver
>               break
>             rescue SyntaxError
>               raise
>             rescue ScriptError, Exception, NameError
>             end
>           end
>           raise "no driver for sqlite3 found" unless driver
>       end
>
>       @driver = driver.new
>     end
>     private :load_driver
>
> Macruby enters the method with driver set to NSNull, and the driver fails
> to load. In ruby (1.9.0) the driver loads via the Native driver.
>
> irb19 session:
> >> db = SQLite3::Database.new("/Users/Tim/Desktop/newdb")
> => #<SQLite3::Database:0x5cba48
> @driver=#<SQLite3::Driver::Native::Driver:0x5c4784 @callback_data={},
> @authorizer={}, @busy_handler={}, @trace={}>,
> @statement_factory=SQLite3::Statement,
> @handle=#<SWIG::TYPE_p_sqlite3:0x5c470c>, @closed=false,
> @results_as_hash=false, @type_translation=false, @translator=nil,
> @transaction_active=false>
>
> Can anyone offer an idea about how they might try to patch this to work
> with macruby?  I know an alternative would be CoreData--but it is too
> cumbersome for me.
> Thanks,
> Tim
>
> _______________________________________________
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> MacRuby-devel at lists.macosforge.org
> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>
>
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