I''m having a particularly difficult time undersanding one lesson from
this book. This is in relation ot how one would grab "search"
parameters from web forms to search for records in the database. I
understand the :conditions part of find() but am confused on the code:
1- name = params[:name]
pos = Order.find(:all,
:conditions => ["name = ? and pay_type = ''po''" ,
name])
2- name = params[:name]
pay_type = params[:pay_type]
pos = Order.find(:all,
:conditions => ["name = :name and pay_type = :pay_type" ,
{:pay_type => pay_type, :name => name}])
3- pos = Order.find(:all,
:conditions => ["name = :name and pay_type = :pay_type" , params])
Also, I know what a hash is but don''t understand how it''s
being used in 2 & 3.
TIA
Stuart
Was this question not explained well ? It''s 3 ways (according to AWDWR that you can grab back search parameters from forms, but in the first one, I understand the ? but then it says the 2nd element replaces the first question mark ?, that is confusing me. Stuart On 6/19/06, Dark Ambient <sambient@gmail.com> wrote:> I''m having a particularly difficult time undersanding one lesson from > this book. This is in relation ot how one would grab "search" > parameters from web forms to search for records in the database. I > understand the :conditions part of find() but am confused on the code: > > 1- name = params[:name] > pos = Order.find(:all, > :conditions => ["name = ? and pay_type = ''po''" , name]) > > 2- name = params[:name] > pay_type = params[:pay_type] > pos = Order.find(:all, > :conditions => ["name = :name and pay_type = :pay_type" , > {:pay_type => pay_type, :name => name}]) > > 3- pos = Order.find(:all, > :conditions => ["name = :name and pay_type = :pay_type" , params]) > > Also, I know what a hash is but don''t understand how it''s being used in 2 & 3. > > TIA > Stuart >
On 6/19/06, Dark Ambient <sambient@gmail.com> wrote:> Was this question not explained well ?Try coding you up a page that contains the line: <%= debug(:params) %> And see if it makes more sense. Also skip forward to the Appendix and check out Hashes (pg 562-564 by "corner" page numbers). It''s basically a substitution system, anything in the hash gets substituted for an appropriate symbol in the string. In fact reading the whole Appendix on Ruby will probably help with the syntactic issues. :) -Curtis
I was king of thinking along the substitution angle. I''ll check the material you reference. On a related note, I''m in script / console and I can''t initiate a variable with params i type name = params[:name] and the error comes back as undefine method or variable. Stuart On 6/19/06, Curtis <cuspendlove@gmail.com> wrote:> On 6/19/06, Dark Ambient <sambient@gmail.com> wrote: > > Was this question not explained well ? > > Try coding you up a page that contains the line: > > <%= debug(:params) %> > > And see if it makes more sense. Also skip forward to the Appendix and > check out Hashes (pg 562-564 by "corner" page numbers). It''s > basically a substitution system, anything in the hash gets substituted > for an appropriate symbol in the string. > > In fact reading the whole Appendix on Ruby will probably help with the > syntactic issues. :) > > > -Curtis > _______________________________________________ > Rails mailing list > Rails@lists.rubyonrails.org > http://lists.rubyonrails.org/mailman/listinfo/rails >
You didn''t ask a question -- you said you were confused. http://api.rubyonrails.org/ Look under ActiveRecord::Base and read all about, which based on your question you clearly haven''t done. -- Posted via http://www.ruby-forum.com/.
Ouch! I havent dug into the api docs yet as I''m still winding my way through the book. Stuart On 6/19/06, Jim <fijimf@gmail.com> wrote:> You didn''t ask a question -- you said you were confused. > > http://api.rubyonrails.org/ > > Look under ActiveRecord::Base and read all about, which based on your > question you clearly haven''t done. > > -- > Posted via http://www.ruby-forum.com/. > _______________________________________________ > Rails mailing list > Rails@lists.rubyonrails.org > http://lists.rubyonrails.org/mailman/listinfo/rails >
On 6/19/06, Curtis <cuspendlove@gmail.com> wrote:> Try coding you up a page that contains the line: > > <%= debug(:params) %> >I got back --- :params. Stuart
On 6/19/06, Dark Ambient <sambient@gmail.com> wrote:> i type name = params[:name] > and the error comes back as undefine method or variable.http://api.rubyonrails.org/ ActionController::Base [RW] params Holds a hash of all the GET, POST, and Url parameters passed to the action. Accessed like params["post_id"] to get the post_id. No type casts are made, so all values are returned as strings. Only available in the context of a superclass of ActionController::Base. :) (I.E. An incoming request being processed by a Controller). Thusly if you add my original line of code into an .rhtml template (that was called as a result of a web form submission) you should see the params array. -Curtis -Curtis
On Mon, 2006-06-19 at 13:39 -0600, Dark Ambient wrote:> On 6/19/06, Curtis <cuspendlove@gmail.com> wrote: > > > Try coding you up a page that contains the line: > > > > <%= debug(:params) %>---- <%= debug params %> Craig
On 6/19/06, Craig White <craigwhite@azapple.com> wrote:> On Mon, 2006-06-19 at 13:39 -0600, Dark Ambient wrote: > > On 6/19/06, Curtis <cuspendlove@gmail.com> wrote: > > > > > Try coding you up a page that contains the line: > > > > > > <%= debug(:params) %> > ---- > <%= debug params %>Doh! Crap...sorry...heehee... Working with Java at the moment and had my syntax munged. ;)
On 6/19/06, Curtis <cuspendlove@gmail.com> wrote:> > ---- > > <%= debug params %> > > Doh! Crap...sorry...heehee... Working with Java at the moment and > had my syntax munged. ;)No problem, I haven''t created a form yet and at this point will probably hold off. There has got to be some documentation about params around somehere. Hashes and arrays I understand, it''s the syntax of the conditions string that I''m having an extremely hard time figuring out. Up to now, most of Ruby and Rails makes sense to me. Stuart
On Mon, 2006-06-19 at 14:52 -0600, Dark Ambient wrote:> On 6/19/06, Curtis <cuspendlove@gmail.com> wrote: > > > > ---- > > > <%= debug params %> > > > > Doh! Crap...sorry...heehee... Working with Java at the moment and > > had my syntax munged. ;) > > > No problem, I haven''t created a form yet and at this point will > probably hold off. There has got to be some documentation about > params around somehere. Hashes and arrays I understand, it''s the > syntax of the conditions string that I''m having an extremely hard time > figuring out. Up to now, most of Ruby and Rails makes sense to me.---- params is the hash that results from the post action. Craig
It''s clearer to me now. Thanks for the help. Stuart On 6/19/06, Craig White <craigwhite@azapple.com> wrote:> On Mon, 2006-06-19 at 14:52 -0600, Dark Ambient wrote: > > On 6/19/06, Curtis <cuspendlove@gmail.com> wrote: > > > > > > ---- > > > > <%= debug params %> > > > > > > Doh! Crap...sorry...heehee... Working with Java at the moment and > > > had my syntax munged. ;) > > > > > > No problem, I haven''t created a form yet and at this point will > > probably hold off. There has got to be some documentation about > > params around somehere. Hashes and arrays I understand, it''s the > > syntax of the conditions string that I''m having an extremely hard time > > figuring out. Up to now, most of Ruby and Rails makes sense to me. > ---- > params is the hash that results from the post action. > > Craig > > _______________________________________________ > Rails mailing list > Rails@lists.rubyonrails.org > http://lists.rubyonrails.org/mailman/listinfo/rails >