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Hi , I am new to rails, and i need to know one thing, i have a table called Categories and i want to self join it in such a way , that one category could be a parent of many categories, but could be child of only one category. Please tell me how to tell rails , in my Category Model, does the following work for me ? class Category belongs_to :category has_many :categories end

I have categories and sub-categories in a table called "categories". Every row has a "parent" field to note if the entry is the sub-category of another (never goes deeper than 1 level). So there might be something like this: id | name | parent 1 Dog 0 2 Pug 1 3 Siamese 5 4 Shih Tzu 1 5 Cat 0 6 Wiener Dog 1 7 Persian