If I have a User table and a form that displays all my users with a Rank. I want to be able to rank my users and then hit 'update' and all users will be parsed by my action into User model obects and then persisted with their new rank to the DB. Using "scaffold :user" in my controller works wonders for Single instance CRUD functionality of my User class, but can it be done with a list? So basically I have this def get_users @user_list = User.find_all() end In my views I'm doing. <% form_tag :action => 'update_users' do %> <% for user in @user_list %> <%-- display the user information here as a form --> <% end %> <% end %> <%= submit_tag "Update Users" %> I would love to have the submit button (and associated action call) update ALL the users automatically without ME having to create a complex parser to break all the :params being passed into User objects and save them 1 by 1. (Through a loop of course). I hope my description is clear.. it's crystal in my head. ;)
on 2007-07-31 22:09
on 2007-07-31 23:26
I am still relatively new to Rails so I am not sure if there is an automated way to do this, but if there isn't, why would it be complex? This should work and isn't too complex... In Controller: def update_users @user_list = User.find(params[:user].keys) for user in @user_list user.rank = params[:user][user.id][:rank] user.save end end In View: <% for @user in @user_list %> <%= text_field 'user', 'rank' %> <% end %>
on 2007-08-02 03:27
> In Controller: > def update_users > @user_list = User.find(params[:user].keys) > for user in @user_list > user.rank = params[:user][user.id][:rank] > user.save > end > end > > In View: > <% for @user in @user_list %> > <%= text_field 'user', 'rank' %> > <% end %> I hate to reply to my own post, but I just found a way to do it with one line. The view code I wrote above is still applicable, but in the controller you can put: User.update(params[:user].keys, params[:user].values) I found this in the book Agile Web Development with Rails, 2nd ed, p499. There doesn't seem to be a good way to catch errors with this method, though.
on 2007-08-02 04:04
Dondi, Perhaps this might help (with lots of error checking) if user = User.find(params[:user][:id]) then if user.update_attributes(params[:user].keys, params[:user].values) then if user.save then puts "All updated OK" redirect or something else puts "Save failed" end else puts "Validation failed" end else puts "Couldn't find the user in the database end render Cheers, --Kip On Aug 2, 9:27 am, Dondi Stroma <rails-mailing-l...@andreas-s.net>
on 2007-08-02 06:47
Kip wrote: > Dondi, > > Perhaps this might help (with lots of error checking) The OP wanted to update the whole list of users as simple as possible. I do not know if they needed error checking or not, so I wanted to point out that the one-liner I found won't catch errors (it returns the user objects even if they failed validation and could not be saved).