Question

Hope your all enjoying your hollydays.

Ive run into a pretty funny problem when trying to insert rows into a really really simple database table.
The basic idea is pretty simple. The user selects one/multiple users in a multiselect which are supposed to be added to a group.

This piece of code will insert a row into the user_group_relationships table, but the users id always

   @group = Group.find(params[:group_id])

   params[:newMember][:users].each do |uid|
      # For debugging purposes.
      puts 'Uid:'+uid

      @rel = @group.user_group_relationships.build( :user_id => uid.to_i )          
      @rel.save 

    end

The user id always gets inserted as null even though it is clearly there. You can see the uid in this example is 5, so it should work.

Uid:5
…
SQL (0.3ms) INSERT INTO
“user_group_relationships”
(“created_at”, “group_id”,
“updated_at”, “user_id”) VALUES
(‘2010-12-27 14:03:24.331303’, 2,
‘2010-12-27 14:03:24.331303’, NULL)

Any ideas why this fails?

Answer 1

Looks like user_id is not attr_accessible in the UserGroupRelationship model.

You might also want to check this it may be relevant.