# Field observer parameters **URL:** \ **Category:** Rails\ **Created:** [June 2, 2008, 12:04am UTC](https://www.ruby-forum.com/t/field-observer-parameters/139215 "2008-06-02T00:04:18Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![mex23](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@mex23](https://www.ruby-forum.com/u/mex23)\ **Post date:** [June 2, 2008, 12:04am UTC](https://www.ruby-forum.com/t/field-observer-parameters/139215/1 "2008-06-02T00:04:18Z")
How do I pass more than one parameter through :with in a field observer? Here is my code: \< %= observe\_field(’article\_image\_id’, :frequency =\> 0.25, :update =\> ‘image\_preview’, :url =\> { :action =\> :image\_preview }, :with =\> “‘id=’+value”) %\> I need to pass also another value. How should I modify the code? Thanks Stefano ---
**Author:** ![mex23](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@mex23](https://www.ruby-forum.com/u/mex23)\ **Post date:** [June 2, 2008, 1:52am UTC](https://www.ruby-forum.com/t/field-observer-parameters/139215/2 "2008-06-02T01:52:44Z")
You’re just building up a string that represents the query string for the http request using javascript,so add ‘&my\_new\_param=’+my\_param\_value On Jun 1, 6:04 pm, Stefano B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![mex23](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@mex23](https://www.ruby-forum.com/u/mex23)\ **Post date:** [June 2, 2008, 6:12am UTC](https://www.ruby-forum.com/t/field-observer-parameters/139215/3 "2008-06-02T06:12:47Z")
I’d like to add that you may need to encode the parameter :with =\> “‘myparam=’+encodeURIComponent($F(‘form\_field\_id’)) +’¶m2=’+encodeURIComponent($F(‘form\_field\_id’))” ---
**Author:** ![mex23](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@mex23](https://www.ruby-forum.com/u/mex23)\ **Post date:** [June 2, 2008, 9:03am UTC](https://www.ruby-forum.com/t/field-observer-parameters/139215/4 "2008-06-02T09:03:17Z")
On Jun 2, 5:12 am, rubynuby [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I’d like to add that you may need to encode the parameter > > :with =\> “‘myparam=’+encodeURIComponent($F(‘form\_field\_id’)) > +‘¶m2=’+encodeURIComponent($F(‘form\_field\_id’))” You should indeed be doing that. There’s some other ways of doing this, I wrote about it over at > **[:with or :without you: link\_to\_remote's mysterious parameter - Space Vatican](https://www.spacevatican.org/2008/5/17/with-or-without-you-link_to_remote-s-mysterious-parameter/)** > > One of the nice things about Rails is that it makes it really easy to get off the ground with Ajax, thanks to the link\_to\_remote helper (and all the … Fred ---
**Author:** ![mex23](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@mex23](https://www.ruby-forum.com/u/mex23)\ **Post date:** [June 2, 2008, 2:03pm UTC](https://www.ruby-forum.com/t/field-observer-parameters/139215/5 "2008-06-02T14:03:01Z")
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday 02 June 2008 09:02:15 Frederick C. wrote: > I wrote about [link\_to\_remote :with] over at > **[:with or :without you: link\_to\_remote's mysterious parameter - Space Vatican](https://www.spacevatican.org/2008/5/17/with-or-without-you-link_to_remote-s-mysterious-parameter/)** > > One of the nice things about Rails is that it makes it really easy to get off the ground with Ajax, thanks to the link\_to\_remote helper (and all the … That’s the best treatment of the subject I’ve ever seen! Thanks, Sheldon. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFIQ+EepGJX8XSgas0RAg49AJ97nRSPPAHCEUD56Hya8G6EmrBoIQCgkKtT F5hIUF1RdF2Cst30jyuQ/Jo= =kmsd -----END PGP SIGNATURE----- ---
**Author:** ![mex23](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@mex23](https://www.ruby-forum.com/u/mex23)\ **Post date:** [June 3, 2008, 8:53pm UTC](https://www.ruby-forum.com/t/field-observer-parameters/139215/6 "2008-06-03T20:53:40Z")
Many thanks guys!