Find or create by field doesnt work

Question

Ive got a model caleld SpacialBody, and I need to seed some records so first off I added this to my seeds.rb

[
    ["Sol",0,0,0,"standard"]
].each do |body|
    nb=SpacialBody.find_or_create_by_name(body[0])
    nb.name = body[0]
    nb.x = body[1]
    nb.y = body[2]
    nb.type = SpacialBody::Types[body[3]]
    nb.class = body[4]
    nb.save
end

and this produced an error. I then went into console to test the code and found that this happened:

SpacialBody.new => # SpacialBody.find_by_name("Sol") => nil SpacialBody.find_or_create_by_name("Sol") NoMethodError: undefined method generated_methods' for nil:NilClass from /var/lib/gems/1.8/gems/activesupport-2.3.8/lib/active_support/whiny_nil.rb:52:inmethod_missing' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/attribute_methods.rb:356:in respond_to?' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2906:inassign_attributes' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2902:in each' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2902:inassign_attributes' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2775:in attributes=' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1965:insend' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1965:in find_or_create_by_name' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:2475:ininitialize' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1963:in new' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1963:infind_or_create_by_name' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1975:in send' from /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1975:inmethod_missing' from (irb):3

Ive used find_or_create_by_field in other projects without incedent, and i cant see anything different in my setup here.

Its only this model that has the problem, others in the same project work fine.

There are no validations the model is just class SpacialBody < ActiveRecord::Base end first thing i did was remove things like the attraccesor line — Arcath

Arcath Arcath · Accepted Answer · 2010-08-01T13:13:16

facepalm

using class and type as fields in the model.... not a good move

both are reserved names which cause ActiveRecord to fail when building the methods.

Find or create by field doesnt work

1 Answers