Rails 3 Add Foreign Key in Migration Problems
Does anyone know of a way to create a foreign key in Rails 3 using migrati开发者_如何学Goons?
the foreigner gem works well for me. it adds a few methods to Rails migrations that allow easy foreign key creation and deletion:
example:
create_table :site_credit_payments do |t|
t.decimal :amount, precision: 8, scale: 2, nil: false
t.string :note, nil: true
t.integer :credit_account_id
t.timestamps
end
add_foreign_key :site_credit_payments, :credit_accounts
foreign_key_migrations,but I dont like that.
If you're app has ActiveRecord::Migration (rails 3 apps do), use add_foreign_key
. Documentation here:
http://araddconstraint.rubyforge.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html
Note that this is a plugin and not a part of Active Record.
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