I have a series of countries listed in a table in the following form:
id, country_name
I want to pull these in and I''m trying everything under the sun from a
variety of different peoples pages. I just cannot get anything working
at all. I have tried pulling all the records in the the ctrl.rb file
with:
@country_list = Country.find_all
I get the following:
undefined method `find_all'' for #<Class:0xb657a3a8>
I have put this in the following method
def new
@usr = Usr.new
@country_list = Country.find_all
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => @usr }
end
end
I''m not fussy about the methodology, I simply want a drop down list the
easiest and simplest way...I have tried a number of other approaching,
but I wonder if there are problems with RoR versions?
Thanks in advance.
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disruptive tech wrote:> I have a series of countries listed in a table in the following form: > > id, country_name > > I want to pull these in and I''m trying everything under the sun from a > variety of different peoples pages. I just cannot get anything working > at all. I have tried pulling all the records in the the ctrl.rb file > with: > > @country_list = Country.find_all > > I get the following: > > undefined method `find_all'' for #<Class:0xb657a3a8> > > I have put this in the following method > > def new > @usr = Usr.new > @country_list = Country.find_all > respond_to do |format| > format.html # new.html.erb > format.xml { render :xml => @usr } > end > end > > > I''m not fussy about the methodology, I simply want a drop down list the > easiest and simplest way...I have tried a number of other approaching, > but I wonder if there are problems with RoR versions? > > Thanks in advance.I also tried directly in the view: collection_select ''country'', ''type'', Type.find(:all), :type_name, :id with nothing in the controller. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
I''m also trying this:
controller
----------
def new
@usr = Usr.new
@country_list = Country.find(:all, :order=>"country_name")
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => @usr }
end
end
and in view
-----------
<%= collection_select(:country, :id, @country_list, :id, :country_name,
options ={:prompt => "-Select a cnt"}, :class
=>"country") %>
I get the following on loading a new.html.erb
You have a nil object when you didn''t expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.map
Any ideas? Thanks
B
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On 4 August 2010 09:32, disruptive tech <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> I''m also trying this: > > controller > ---------- > > def new > @usr = Usr.new > @country_list = Country.find(:all, :order=>"country_name") > respond_to do |format| > format.html # new.html.erb > format.xml { render :xml => @usr } > end > end > > and in view > ----------- > > <%= collection_select(:country, :id, @country_list, :id, :country_name, > options ={:prompt => "-Select a cnt"}, :class =>"country") %> > > I get the following on loading a new.html.erb > > You have a nil object when you didn''t expect it! > You might have expected an instance of Array. > The error occurred while evaluating nil.mapWhat happens if, rather than using collection select, you just display the id and country name for each item in @country list? Doing that will prove that the data is ok. I presume that the table has a country_name column. Colin> > Any ideas? Thanks > > B > -- > Posted via http://www.ruby-forum.com/. > > -- > You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. > For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en. > >-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Colin Law wrote:> On 4 August 2010 09:32, disruptive tech <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote: >> � � �format.xml �{ render :xml => @usr } >> >> You have a nil object when you didn''t expect it! >> You might have expected an instance of Array. >> The error occurred while evaluating nil.map > > What happens if, rather than using collection select, you just display > the id and country name for each item in @country list? Doing that > will prove that the data is ok. I presume that the table has a > country_name column. > > Colinhere is a read-out - the data is there... Listing countries Country name UK Show Edit Destroy France Show Edit Destroy Germany Show Edit Destroy describe countries; +--------------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +--------------+--------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | country_name | varchar(255) | YES | | NULL | | | created_at | datetime | YES | | NULL | | | updated_at | datetime | YES | | NULL | | +--------------+--------------+------+-----+---------+----------------+ 4 rows in set (0.00 sec) select * from countries; +----+--------------+---------------------+---------------------+ | id | country_name | created_at | updated_at | +----+--------------+---------------------+---------------------+ | 4 | UK | 2010-08-02 16:37:43 | 2010-08-02 16:37:43 | | 5 | France | 2010-08-02 16:37:51 | 2010-08-02 16:37:51 | | 6 | Germany | 2010-08-04 08:20:03 | 2010-08-04 08:20:03 | +----+--------------+---------------------+---------------------+ 3 rows in set (0.00 sec) -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On 4 August 2010 10:56, disruptive tech <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> Colin Law wrote: >> On 4 August 2010 09:32, disruptive tech <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote: >>> � � �format.xml �{ render :xml => @usr } >>> >>> You have a nil object when you didn''t expect it! >>> You might have expected an instance of Array. >>> The error occurred while evaluating nil.map >> >> What happens if, rather than using collection select, you just display >> the id and country name for each item in @country list? Doing that >> will prove that the data is ok. I presume that the table has a >> country_name column. >> >> Colin > > here is a read-out - the data is there... > > Listing countries > > Country name > UK Show Edit Destroy > France Show Edit Destroy > Germany Show Edit DestroyIs that from code inserted in the view at the same point as the collection_select? Please show the complete error trace and the code around the error, and confirm which line of code the error is on. Colin> > > describe countries; > +--------------+--------------+------+-----+---------+----------------+ > | Field | Type | Null | Key | Default | Extra | > +--------------+--------------+------+-----+---------+----------------+ > | id | int(11) | NO | PRI | NULL | auto_increment | > | country_name | varchar(255) | YES | | NULL | | > | created_at | datetime | YES | | NULL | | > | updated_at | datetime | YES | | NULL | | > +--------------+--------------+------+-----+---------+----------------+ > 4 rows in set (0.00 sec) > > select * from countries; > +----+--------------+---------------------+---------------------+ > | id | country_name | created_at | updated_at | > +----+--------------+---------------------+---------------------+ > | 4 | UK | 2010-08-02 16:37:43 | 2010-08-02 16:37:43 | > | 5 | France | 2010-08-02 16:37:51 | 2010-08-02 16:37:51 | > | 6 | Germany | 2010-08-04 08:20:03 | 2010-08-04 08:20:03 | > +----+--------------+---------------------+---------------------+ > 3 rows in set (0.00 sec) > > > > -- > Posted via http://www.ruby-forum.com/. > > -- > You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. > For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en. > >-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Extracted source (around line #23):
20: <%= f.text_field :email %>
21: </p>
22: <p>
23: <%= collection_select(:country, :id, @country_list, :id,
:country_name,
24: options ={:prompt => "-Select a cnt"}, :class
=>"country") %>
25: <%= f.label :country %><br />
26: <%= f.text_field :country %>
RAILS_ROOT: /home/brett/RoR/Apps/OpenBenefit/benefit
Application Trace | Framework Trace | Full Trace
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/helpers/form_options_helper.rb:327:in
`options_from_collection_for_select''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/helpers/form_options_helper.rb:543:in
`to_collection_select_tag''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/helpers/form_options_helper.rb:162:in
`collection_select''
/home/brett/RoR/Apps/OpenBenefit/benefit/app/views/usrs/new.html.erb:23:in
`_run_erb_app47views47usrs47new46html46erb''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/helpers/form_helper.rb:499:in
`fields_for''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/helpers/form_helper.rb:282:in
`form_for''
/home/brett/RoR/Apps/OpenBenefit/benefit/app/views/usrs/new.html.erb:3:in
`_run_erb_app47views47usrs47new46html46erb''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/renderable.rb:34:in
`send''
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`render''
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`with_template''
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`render''
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`render_template''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/base.rb:265:in
`render''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_view/base.rb:348:in
`_render_with_layout''
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`render''
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`render_for_file''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/base.rb:942:in
`render_without_benchmark''
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`ms''
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`ms''
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`render''
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`send''
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/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/mime_responds.rb:179:in
`call''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/mime_responds.rb:179:in
`respond''
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`each''
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`respond''
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`respond_to''
/home/brett/RoR/Apps/OpenBenefit/benefit/app/controllers/usrs_controller.rb:38:in
`new''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/base.rb:1331:in
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/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/base.rb:1331:in
`perform_action_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/filters.rb:617:in
`call_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/filters.rb:610:in
`perform_action_without_benchmark''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/benchmarking.rb:68:in
`perform_action_without_rescue''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/core_ext/benchmark.rb:17:in
`ms''
/usr/lib/ruby/1.8/benchmark.rb:308:in `realtime''
/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/core_ext/benchmark.rb:17:in
`ms''
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`perform_action_without_rescue''
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`perform_action_without_flash''
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`perform_action''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/base.rb:532:in
`send''
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`process_without_filters''
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`process''
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`process''
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`call''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/routing/route_set.rb:438:in
`call''
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`dispatch''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:121:in
`_call''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:130
/usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/query_cache.rb:29:in
`call''
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`call''
/usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in
`cache''
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`cache''
/usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/query_cache.rb:28:in
`call''
/usr/lib/ruby/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in
`call''
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`call''
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`call''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/params_parser.rb:15:in
`call''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/session/cookie_store.rb:99:in
`call''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/failsafe.rb:26:in
`call''
/usr/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/lock.rb:11:in `call''
/usr/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/lock.rb:11:in
`synchronize''
/usr/lib/ruby/gems/1.8/gems/rack-1.1.0/lib/rack/lock.rb:11:in `call''
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`call''
/usr/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/reloader.rb:34:in
`run''
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`call''
/usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/rails/rack/static.rb:31:in
`call''
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`call''
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`call''
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`service''
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`gem_original_require''
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script/server:3
disruptive tech wrote:> Colin Law wrote:
>> On 4 August 2010 09:32, disruptive tech
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:
>>> � � �format.xml �{ render :xml => @usr }
>>>
>>> You have a nil object when you didn''t expect it!
>>> You might have expected an instance of Array.
>>> The error occurred while evaluating nil.map
>>
>> What happens if, rather than using collection select, you just display
>> the id and country name for each item in @country list? Doing that
>> will prove that the data is ok. I presume that the table has a
>> country_name column.
>>
>> Colin
>
> here is a read-out - the data is there...
>
> Listing countries
>
> Country name
> UK Show Edit Destroy
> France Show Edit Destroy
> Germany Show Edit Destroy
>
>
> describe countries;
> +--------------+--------------+------+-----+---------+----------------+
> | Field | Type | Null | Key | Default | Extra |
> +--------------+--------------+------+-----+---------+----------------+
> | id | int(11) | NO | PRI | NULL | auto_increment |
> | country_name | varchar(255) | YES | | NULL | |
> | created_at | datetime | YES | | NULL | |
> | updated_at | datetime | YES | | NULL | |
> +--------------+--------------+------+-----+---------+----------------+
> 4 rows in set (0.00 sec)
>
> select * from countries;
> +----+--------------+---------------------+---------------------+
> | id | country_name | created_at | updated_at |
> +----+--------------+---------------------+---------------------+
> | 4 | UK | 2010-08-02 16:37:43 | 2010-08-02 16:37:43 |
> | 5 | France | 2010-08-02 16:37:51 | 2010-08-02 16:37:51 |
> | 6 | Germany | 2010-08-04 08:20:03 | 2010-08-04 08:20:03 |
> +----+--------------+---------------------+---------------------+
> 3 rows in set (0.00 sec)
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I can see data in the DB, but cannot seem to get this into a drop down. The controller code does not produce an error. But the errors would seem to imply that there is no data being pulled in. -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On 4 August 2010 11:10, Colin Law <clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:> On 4 August 2010 10:56, disruptive tech <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote: >> Colin Law wrote: >>> On 4 August 2010 09:32, disruptive tech <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote: >>>> � � �format.xml �{ render :xml => @usr } >>>> >>>> You have a nil object when you didn''t expect it! >>>> You might have expected an instance of Array. >>>> The error occurred while evaluating nil.map >>> >>> What happens if, rather than using collection select, you just display >>> the id and country name for each item in @country list? Doing that >>> will prove that the data is ok. I presume that the table has a >>> country_name column. >>> >>> Colin >> >> here is a read-out - the data is there... >> >> Listing countries >> >> Country name >> UK Show Edit Destroy >> France Show Edit Destroy >> Germany Show Edit Destroy > > Is that from code inserted in the view at the same point as the > collection_select?You replied showing the trace (but not actually as a reply to this post) but did not answer the above question Colin> > Please show the complete error trace and the code around the error, > and confirm which line of code the error is on.-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Colin Law wrote:> On 4 August 2010 11:10, Colin Law <clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote: >>>> the id and country name for each item in @country list? Doing that >>> UK Show Edit Destroy >>> France Show Edit Destroy >>> Germany Show Edit Destroy >> >> Is that from code inserted in the view at the same point as the >> collection_select? > > You replied showing the trace (but not actually as a reply to this > post) but did not answer the above question > > ColinProblem solved, I had not put the @country_list into the other methods - such as the index one. This now worked and I can create a drop down populated from the table. Now I am presuming the select statement will pop the id into the country field in my created users table. However I cannot seem to find it in the actual data tables. Plus also how best to validate drop down boxes? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On 4 August 2010 14:15, disruptive tech <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:> Colin Law wrote: >> On 4 August 2010 11:10, Colin Law <clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote: >>>>> the id and country name for each item in @country list? Doing that >>>> UK Show Edit Destroy >>>> France Show Edit Destroy >>>> Germany Show Edit Destroy >>> >>> Is that from code inserted in the view at the same point as the >>> collection_select? >> >> You replied showing the trace (but not actually as a reply to this >> post) but did not answer the above question >> >> Colin > > Problem solved, I had not put the @country_list into the other methods - > such as the index one. This now worked and I can create a drop down > populated from the table.Hmm, so the error in new.html.erb was due to the fact that you had not populated @country_list in the controller#index. I think not.> > Now I am presuming the select statement will pop the id into the country > field in my created users table. However I cannot seem to find it in the > actual data tables.No idea what you are talking about. All a select does is to allow a selection.> > Plus also how best to validate drop down boxes?Validation is nothing to do with how the data are selected. It is purely a verification of the data as it goes into the db via the model. Colin> > -- > Posted via http://www.ruby-forum.com/. > > -- > You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. > For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en. > >-- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.