On 11 July 2013 06:55, Peter <pe...@poproj.com> wrote: > Hi Everyone, > > Do I edit the corresponding migration also to show the belongs_to (and the > has_many)? I have a many to many relationship where I am using the "has_many > :through" association. When I place in the individual classes the 'has_many > :through' and the 'belongs_to' associations, do I also edit the > corresponding migrations to reflect those changes?
No, there is no need to change the existing migrations. The relationship declarations (has_many and so on) have not direct effect on the database contents, they just tell Rails what to expect in the database. > > I would like those changes to be reflected in the database also, but I don't > know whether there was a way to run one of the migration generator commands > that would have included these associations. > > Also, I have already run the migration so is there a way to create a new > migration that would simply add these associations? I would prefer not to > edit existing migrations. Whenever you make a change to the database use a new migration. You will just get yourself (and likely the database) very confused if you try to add to an existing migration. > > Thank you in advance for the advice. I'm very new to Rails and am just > learning it with a toy application I'm building. Work right through a good tutorial such as railstutorial.org (which is free to use online) before starting you own experiments. That will show you the basics of Rails. Colin -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/CAL%3D0gLuc4_t-AaPd9Ge6VPuPt1edeB6AYoL57iAKRjufwvXHpQ%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
