11155
(-- --)
August 2, 2010, 4:28pm
1
Hi
I have another question for how best to do this. Now I have been
following the tutorial at:
http://www.tunaslut.com/learning-ruby-drop-down-lists-in-one-to-many-relationships ,
however when I change the view over from
<% @cities.each do |city| %>
<tr>
<td><%=h city.city_name %></td>
<td><%=h city.country_id %></td>
to:
<% @cities.each do |city| %>
<tr>
<td><%=h city.city_name %></td>
<td><%=h city.country.country_name %></td>
The system breaks with the following error
NoMethodError in Cities#index
Showing app/views/cities/index.html.erb where line #12 raised:
undefined method `country_name' for nil:NilClass
Extracted source (around line #12 ):
when attempting to display data on cities
My questions are:
1. Is there an easier way of doing drop down boxed populated from a
table?
2. is this foreign key assignment working?
3. is this a good way of doing FK asignments? is there a better way.
Please forgive me, I'm old school, more used to the SQL statements....
Thanks again.
11155
(-- --)
August 2, 2010, 5:22pm
2
disruptive tech wrote:
Hi
I have another question for how best to do this. Now I have been
following the tutorial at:
http://www.tunaslut.com/learning-ruby-drop-down-lists-in-one-to-many-relationships ,
however when I change the view over from
<% @cities.each do |city| %>
<tr>
<td><%=h city.city_name %></td>
<td><%=h city.country_id %></td>
to:
<% @cities.each do |city| %>
<tr>
<td><%=h city.city_name %></td>
<td><%=h city.country.country_name %></td>
The system breaks with the following error
NoMethodError in Cities#index
Showing app/views/cities/index.html.erb where line #12 raised:
undefined method `country_name' for nil:NilClass
...which means that city.country is nil. You have to make it not be.
Extracted source (around line #12 ):
when attempting to display data on cities
My questions are:
1. Is there an easier way of doing drop down boxed populated from a
table?
collection_select
2. is this foreign key assignment working?
3. is this a good way of doing FK asignments? is there a better way.
I don't see any assignment in your code.
Please forgive me, I'm old school, more used to the SQL statements....
What's that got to do with anything?
Thanks again.
Best,