I''m lost on regular expressions to begin with...
I''m trying to fix a value to one of 4 radio buttons as there will be
value of either 1,2,3 or 4 in @roles_users...
<TD><input type="radio" id="roles"
name="case_managers[case_manager_name]"
value="Case Manager Admin"
<% if =~ @roles_users /1/ checked = "checked" %>
/></TD>
<TD><input type="radio" id="roles"
name="case_managers[case_manager_name]"
value="Case Manager Create"
<% if =~ @roles_users /2/ checked = "checked" %>
/></TD>
<TD><input type="radio" id="roles"
name="case_managers[case_manager_name]"
value="Case Manager View"
<% if =~ @roles_users /3/ checked = "checked" %>
/></TD>
<TD><input type="radio" id="roles"
name="case_managers[case_manager_name]"
value="Case Manager None"
<% if =~ @roles_users /4/ checked = "checked" %>
/></TD>
but this code gets me a syntax error...
@roles_users is a hash created from a find.
Craig
On Saturday 15 April 2006 22:34, Craig White wrote:> I''m lost on regular expressions to begin with... > > I''m trying to fix a value to one of 4 radio buttons as there will be > value of either 1,2,3 or 4 in @roles_users...So @roles_users is an integer, or a string ? I assume an integer...> <TD><input type="radio" id="roles" > name="case_managers[case_manager_name]" > value="Case Manager Admin" > <% if =~ @roles_users /1/ checked = "checked" %> /></TD><%= "checked" if @roles_users == 1 %> Note that the ''if'' must have a corresponding ''end''. The one line form of ''if'' has a mandatory ''then'' too: if @roles_users == 1 then "checked" end ... is the verbose equivalent of the expression above. The syntax for a regular expression is @roles_users =~ /1/> <TD><input type="radio" id="roles" > name="case_managers[case_manager_name]" > value="Case Manager Create" > <% if =~ @roles_users /2/ checked = "checked" %> /></TD> > <TD><input type="radio" id="roles" > name="case_managers[case_manager_name]" > value="Case Manager View" > <% if =~ @roles_users /3/ checked = "checked" %> /></TD> > <TD><input type="radio" id="roles" > name="case_managers[case_manager_name]" > value="Case Manager None" > <% if =~ @roles_users /4/ checked = "checked" %> /></TD> > > but this code gets me a syntax error... > > @roles_users is a hash created from a find.Hmm... so it''s not an integer / string like I understood from the beginning? What''s the contents of your hash? Francois> > Craig > > _______________________________________________ > Rails mailing list > Rails@lists.rubyonrails.org > http://lists.rubyonrails.org/mailman/listinfo/rails
On Sat, 2006-04-15 at 22:47 +0700, Francois GORET wrote:> On Saturday 15 April 2006 22:34, Craig White wrote: > > I''m lost on regular expressions to begin with... > > > > I''m trying to fix a value to one of 4 radio buttons as there will be > > value of either 1,2,3 or 4 in @roles_users... > > So @roles_users is an integer, or a string ? I assume an integer... > > > <TD><input type="radio" id="roles" > > name="case_managers[case_manager_name]" > > value="Case Manager Admin" > > <% if =~ @roles_users /1/ checked = "checked" %> /></TD> > > <%= "checked" if @roles_users == 1 %> > > Note that the ''if'' must have a corresponding ''end''. The one line form of ''if'' > has a mandatory ''then'' too: > if @roles_users == 1 then "checked" end ... is the verbose equivalent of the > expression above. > > The syntax for a regular expression is @roles_users =~ /1/ > > > > <TD><input type="radio" id="roles" > > name="case_managers[case_manager_name]" > > value="Case Manager Create" > > <% if =~ @roles_users /2/ checked = "checked" %> /></TD> > > <TD><input type="radio" id="roles" > > name="case_managers[case_manager_name]" > > value="Case Manager View" > > <% if =~ @roles_users /3/ checked = "checked" %> /></TD> > > <TD><input type="radio" id="roles" > > name="case_managers[case_manager_name]" > > value="Case Manager None" > > <% if =~ @roles_users /4/ checked = "checked" %> /></TD> > > > > but this code gets me a syntax error... > > > > @roles_users is a hash created from a find. > > Hmm... so it''s not an integer / string like I understood from the beginning? > What''s the contents of your hash?---- @roles_users.inspect says... [#"3", "user_id"=>"18"}>, #"7", "user_id"=>"18"}>, #"11", "user_id"=>"18"}>, #"15", "user_id"=>"18"}>, #"19", "user_id"=>"18"}>] Craig
Francois GORET wrote:> <%= "checked" if @roles_users == 1 %> > > Note that the ''if'' must have a corresponding ''end''.Not so: alex@pandora:~$ irb irb(main):001:0> puts ''foo'' if 1 == 1 foo => nil irb(main):002:0> puts ''foo'' if 1 == 0 => nil irb(main):003:0> I don''t think I''ve ever tried that syntax in ERb, though, so I can''t vouch for it in a template... -- Alex
On Sat, 2006-04-15 at 17:21 +0100, Alex Young wrote:> Francois GORET wrote: > > <%= "checked" if @roles_users == 1 %> > > > > Note that the ''if'' must have a corresponding ''end''. > Not so: > > alex@pandora:~$ irb > irb(main):001:0> puts ''foo'' if 1 == 1 > foo > => nil > irb(main):002:0> puts ''foo'' if 1 == 0 > => nil > irb(main):003:0> > > I don''t think I''ve ever tried that syntax in ERb, though, so I can''t > vouch for it in a template...---- still I''m struggling with this...in script/console>> @roles_users=> [#<RolesUsers:0xb796f490 @attributes={"role_id"=>"3", "user_id"=>"18"}>, #<RolesUsers:0xb796f454 @attributes={"role_id"=>"7", "user_id"=>"18"}>, #<RolesUsers:0xb796f404 @attributes={"role_id"=>"11", "user_id"=>"18"}>, #<RolesUsers:0xb796f2c4 @attributes={"role_id"=>"15", "user_id"=>"18"}>, #<RolesUsers:0xb796f274 @attributes={"role_id"=>"19", "user_id"=>"18"}>] I''m trying to figure out if there''s a ''role_id'' that equals 1, 2, 3 or 4 from the above...>> 3 =~ /@roles_users/=> false>> "3" =~ /@roles_users/=> nil>> '':role_id=>"3"'' =~ /@roles_users/=> nil>> ''role_id=>"3"'' =~ /@roles_users/=> nil>> ''role_id=>3'' =~ /@roles_users/=> nil If I assume which element, I can get it but I can''t just assume that (well I can if I ''order'' the items when I retrieve them) but I sure would love to know how to use regex to parse @roles_users anyway. Craig
Hi -- On Sat, 15 Apr 2006, Craig White wrote:> On Sat, 2006-04-15 at 17:21 +0100, Alex Young wrote: >> Francois GORET wrote: >>> <%= "checked" if @roles_users == 1 %> >>> >>> Note that the ''if'' must have a corresponding ''end''. >> Not so: >> >> alex@pandora:~$ irb >> irb(main):001:0> puts ''foo'' if 1 == 1 >> foo >> => nil >> irb(main):002:0> puts ''foo'' if 1 == 0 >> => nil >> irb(main):003:0> >> >> I don''t think I''ve ever tried that syntax in ERb, though, so I can''t >> vouch for it in a template... > ---- > still I''m struggling with this...in script/console > >>> @roles_users > => [#<RolesUsers:0xb796f490 @attributes={"role_id"=>"3", > "user_id"=>"18"}>, #<RolesUsers:0xb796f454 @attributes={"role_id"=>"7", > "user_id"=>"18"}>, #<RolesUsers:0xb796f404 @attributes={"role_id"=>"11", > "user_id"=>"18"}>, #<RolesUsers:0xb796f2c4 @attributes={"role_id"=>"15", > "user_id"=>"18"}>, #<RolesUsers:0xb796f274 @attributes={"role_id"=>"19", > "user_id"=>"18"}>] > > I''m trying to figure out if there''s a ''role_id'' that equals 1, 2, 3 or 4 > from the above... > >>> 3 =~ /@roles_users/ > => false >>> "3" =~ /@roles_users/ > => nil >>> '':role_id=>"3"'' =~ /@roles_users/ > => nil >>> ''role_id=>"3"'' =~ /@roles_users/ > => nil >>> ''role_id=>3'' =~ /@roles_users/ > => nilYou''re performing various tests on the string "@roles_users", which you can tell at a glance doesn''t contain a "3" :-)> If I assume which element, I can get it but I can''t just assume that > (well I can if I ''order'' the items when I retrieve them) but I sure > would love to know how to use regex to parse @roles_users anyway.@roles_users is an array, and regexes are for strings, so it''s not the right way. Here''s a way to see whether the array contains an element whose role_id is "1" through "4": @roles_users.any? {|ru| %w{1 2 3 4}.include?(ru.role_id) } David -- David A. Black (dblack@wobblini.net) Ruby Power and Light, LLC (http://www.rubypowerandlight.com) "Ruby for Rails" PDF now on sale! http://www.manning.com/black Paper version coming in early May!
On Sat, 2006-04-15 at 18:36 -0400, dblack@wobblini.net wrote:> Hi -- > > On Sat, 15 Apr 2006, Craig White wrote: > > > On Sat, 2006-04-15 at 17:21 +0100, Alex Young wrote: > >> Francois GORET wrote: > >>> <%= "checked" if @roles_users == 1 %> > >>> > >>> Note that the ''if'' must have a corresponding ''end''. > >> Not so: > >> > >> alex@pandora:~$ irb > >> irb(main):001:0> puts ''foo'' if 1 == 1 > >> foo > >> => nil > >> irb(main):002:0> puts ''foo'' if 1 == 0 > >> => nil > >> irb(main):003:0> > >> > >> I don''t think I''ve ever tried that syntax in ERb, though, so I can''t > >> vouch for it in a template... > > ---- > > still I''m struggling with this...in script/console > > > >>> @roles_users > > => [#<RolesUsers:0xb796f490 @attributes={"role_id"=>"3", > > "user_id"=>"18"}>, #<RolesUsers:0xb796f454 @attributes={"role_id"=>"7", > > "user_id"=>"18"}>, #<RolesUsers:0xb796f404 @attributes={"role_id"=>"11", > > "user_id"=>"18"}>, #<RolesUsers:0xb796f2c4 @attributes={"role_id"=>"15", > > "user_id"=>"18"}>, #<RolesUsers:0xb796f274 @attributes={"role_id"=>"19", > > "user_id"=>"18"}>] > > > > I''m trying to figure out if there''s a ''role_id'' that equals 1, 2, 3 or 4 > > from the above... > > > >>> 3 =~ /@roles_users/ > > => false > >>> "3" =~ /@roles_users/ > > => nil > >>> '':role_id=>"3"'' =~ /@roles_users/ > > => nil > >>> ''role_id=>"3"'' =~ /@roles_users/ > > => nil > >>> ''role_id=>3'' =~ /@roles_users/ > > => nil > > You''re performing various tests on the string "@roles_users", which > you can tell at a glance doesn''t contain a "3" :-) > > > If I assume which element, I can get it but I can''t just assume that > > (well I can if I ''order'' the items when I retrieve them) but I sure > > would love to know how to use regex to parse @roles_users anyway. > > @roles_users is an array, and regexes are for strings, so it''s not the > right way. Here''s a way to see whether the array contains an element > whose role_id is "1" through "4": > > @roles_users.any? {|ru| %w{1 2 3 4}.include?(ru.role_id) }---- thanks - that was exactly what I need as I am likely to re-factor my code because I really don''t like ''assuming'' the data isn''t going to change, even though I am in control over the data in this case. I recognize my propensity for shooting myself in the foot and this section of code bothered me and what you pointed out appears to be a much better solution, but I had to move on at the time and thus, this information will wait a few days as I now have things working and will do some cleanup over time. Thanks Craig