SQL error in migrations - adding data

Rails
#1

hi.

i’m getting this weird error:
Mysql::Error: #42S22Unknown column ‘categories_count’ in ‘field list’:
UPDATE categories SET categories_count = categories_count + 1 WHERE (id
= 9) AND ( (categories.type = ‘State’ ) )

i’m using a single table inheritance, so in my model i have:
class Category < ActiveRecord::Base
end

class State < Category #works
end

class Ca < Category # getting the error message above when migrating new
data into the existing Categories data.

Any help would help my poor fingers and brain.

Thanks

Dominic

#2

Ok, i think the problem is that i’m trying to use a single table
inheritance method with an acts as tree (all in one table)

i’m dividing out each parent into it’s own inherited model…

is there a proper way to do this?

Dominic S. wrote:

hi.

i’m getting this weird error:
Mysql::Error: #42S22Unknown column ‘categories_count’ in ‘field list’:
UPDATE categories SET categories_count = categories_count + 1 WHERE (id
= 9) AND ( (categories.type = ‘State’ ) )

i’m using a single table inheritance, so in my model i have:
class Category < ActiveRecord::Base
end

class State < Category #works
end

class Ca < Category # getting the error message above when migrating new
data into the existing Categories data.

Any help would help my poor fingers and brain.

Thanks

Dominic