Rails - May 2009 - Canonical Way/Method to Add/Merge Query Parameters onto URL

Hi, I''ve done some searching but haven''t yet found if there is
a
"correct" way to do this.

I have an existing URL (generated, for example, by a call to one of my
named-route''s helpers: login_url). I may (or may not) have, as part of
this URL, a query string fragment ("?test=true" for example) as part
of the URL. I also have 1 (or more) name/value pairs I''d like to add,
as query parameters, to this URL, overwriting existing values if there
is a name collision.

I could write up a method to do this pretty easily. If, however, there
is already rails code and/or a "recommended," "official," or
"canonical" way to do this, I''d like to know.

Let''s say that your controller gets run with params[:test] =>
''true''...

Then in your controller or view you can do:

login_url(params.merge(:test => false, :foo => ''bar''))

and will end up with

..../login?test=false&foo=bar

Look at the merge and reverse_merge methods for more.

-philip



On May 13, 2009, at 1:11 PM, Kendall wrote:
>
> Hi, I''ve done some searching but haven''t yet found if
there is a
> "correct" way to do this.
>
> I have an existing URL (generated, for example, by a call to one of my
> named-route''s helpers: login_url). I may (or may not) have, as
part of
> this URL, a query string fragment ("?test=true" for example) as
part
> of the URL. I also have 1 (or more) name/value pairs I''d like to
add,
> as query parameters, to this URL, overwriting existing values if there
> is a name collision.
>
> I could write up a method to do this pretty easily. If, however, there
> is already rails code and/or a "recommended,"
"official," or
> "canonical" way to do this, I''d like to know.
> >

Thanks. Very helpful!

On May 13, 2:23 pm, Philip Hallstrom <phi...-LSG90OXdqQE@public.gmane.org>
wrote:
> Let''s say that your controller gets run with params[:test] =>
''true''...
>
> Then in your controller or view you can do:
>
> login_url(params.merge(:test => false, :foo =>
''bar''))
>
> and will end up with
>
> ..../login?test=false&foo=bar
>
> Look at the merge and reverse_merge methods for more.
>
> -philip
>
> On May 13, 2009, at 1:11 PM,Kendallwrote:
>
>
>
> > Hi, I''ve done some searching but haven''t yet found
if there is a
> > "correct" way to do this.
>
> > I have an existing URL (generated, for example, by a call to one of my
> > named-route''s helpers: login_url). I may (or may not) have,
as part of
> > this URL, a query string fragment ("?test=true" for example)
as part
> > of the URL. I also have 1 (or more) name/value pairs I''d like
to add,
> > as query parameters, to this URL, overwriting existing values if there
> > is a name collision.
>
> > I could write up a method to do this pretty easily. If, however, there
> > is already rails code and/or a "recommended,"
"official," or
> > "canonical" way to do this, I''d like to know.