Does rails scaffold command support generate belongs_to or many to many model middle table migration info?

Question

Product,Category is two model on rails3 the relation between them are follow:

product has_and_belongs_to_many categories

category has_and_belongs_to_many products

i can use scaffold generate migration for this two modle use

rails g scaffold product name:string
rails g scaffold category name:string

but how can i generate the many to many model's middle table migration info,or i need write it manually,if so this is hard for me,hope someone could help me.

http://guides.rubyonrails.org/association_basics.html#tips-tricks-and-warnings i foud some useful link,it seems need create the assocation table by myself,if so rails is not such magic in my mind — mlzboy, Oct 30 '10 at 03:33
http://en.wikibooks.org/wiki/Ruby_on_Rails/ActiveRecord/Associations#has_and_belongs_to_many also i found another relevent link,i have another question is how to named assocation table,products_categories or categories_products,if both two model start with c or p character put which model name first in assocation-table name — mlzboy, Oct 30 '10 at 03:42

Antarr Byrd · Answer 1 · 2015-11-18T16:01:13.803

2

rails g model ProductCategories product:references category:references

edited Nov 18 '15 at 16:01

answered Nov 14 '12 at 16:15

Antarr Byrd

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shouldn't that be `ProductsCategories`? – Stephen Lead Nov 18 '15 at 02:59
I think `ProductCategories` ? – Antarr Byrd Nov 18 '15 at 16:00

score 2 · Accepted Answer · answered Oct 30 '10 at 10:12

You need create this table by yourself

   create_table :products_categories, :id => false do |t| 
     t.integer :product_id 
     t.integer :category_id
   end

Warning, you need define the :id to false, because this table no need id column. If you have an id column, the table is invalid to be used on has_and_belongs_to_many .

Does rails scaffold command support generate belongs_to or many to many model middle table migration info?

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