So, I’ve written a partial that does some stuff with a given instance of
my class “entity”. Entity is ActiveRecord. I’m able to retrieve all
sorts of data from an @entity, until I do something like:
<% for @attribute in @entity.attributes %>
<%= render(:partial => ‘attribute’) %>
<% end %>
After which point, any attempt on my part to retrieve data from @entity
( for instance <%= @entity.id %> results in:
cannot convert String into Integer
The stack trace is:
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/associations/association_proxy.rb:75:in
[]' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/associations/association_proxy.rb:75:insend’
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/associations/association_proxy.rb:75:in
method_missing' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.13.2/lib/active_record/associations/has_many_association.rb:90:inmethod_missing’
(eval):1:in id' #{RAILS_ROOT}/app/views/main/_entity.rhtml:27 #{RAILS_ROOT}/app/views/main/index.rhtml:30 #{RAILS_ROOT}/app/views/main/index.rhtml:29:ineach’
#{RAILS_ROOT}/app/views/main/index.rhtml:29
This is really starting to tick me off. I had a workaround in which I
retrieved all the important information before I used an association,
but that won’t let me retrieve more than one type of associated
information.
Help?
Brian,
Can you include the actual code for _entity.rhtml, given that’s where
your error is happening?
Cheers,
Pete Y.
http://9cays.com
I’m betting something is broken in your attributes association. Can
you post your entity and attribute models, and the schemas for their
respective tables?
Mark Van H. wrote:
<%= @entity.id.to_s %>
Believe me, I tried that. Besides, you can’t even print out the id or
any text, no matter the format.
Below is the code of _entity.rthml. The line that starts to loop for
attributes will always fail. I hope someone finds something I missed.
<%= @entity.name %>
<div style="font-style: italic; border-top: 1px gray solid;
border-bottom: 1px gray solid">
Attributes
<% for @attribute in @entity.attributes %>
<%= render(:partial => 'attribute') %>
<% end %>
Relations
<% for @relation in @entity.relations %>
<%= @relation.id %>
<% end %>
Mark Van H. wrote:
<%= @entity.id.to_s %>
You could replace this line with <%= @entity.class.name %> and tell
us, what you get. #id is a method that returns the internal ruby id of
an object represented by an integer.
Maybe @entity is not an ActiveRecord…
Pete Y. wrote:
I’m betting something is broken in your attributes association. Can
you post your entity and attribute models, and the schemas for their
respective tables?
class Attribute < ActiveRecord::Base
belongs_to :entity
end
class Entity < ActiveRecord::Base
has_many :attributes
has_many :relations,
:class_name => “Relation”,
:foreign_key => “entity1_id”
has_many :incoming_relations,
:class_name => “Relation”,
:foreign_key => “entity2_id”
end
The schema is mundane. There’s a table for each model, with ids and
other fields. The data types of all those things are correct. I checked
to make sure the key field of Entity was an integer, and it is.
Bryan D. wrote:
has_many :attributes
other fields. The data types of all those things are correct. I checked
to make sure the key field of Entity was an integer, and it is.
Bryan, you have chosen a name that clashes with Rails naming.
An ActiveRecord instance uses an ‘attributes’ hash to hold the state of
its attributes, and this has public accessors (attributes, attributes=).
regards
Justin
Justin F. wrote:
Bryan D. wrote:
has_many :attributes
other fields. The data types of all those things are correct. I checked
to make sure the key field of Entity was an integer, and it is.
Bryan, you have chosen a name that clashes with Rails naming.
An ActiveRecord instance uses an ‘attributes’ hash to hold the state of
its attributes, and this has public accessors (attributes, attributes=).
regards
Justin
Hot damn. That would make sense, wouldn’t it. Guess I’ll have to rename.
Thanks.