xdite/rails-101 — pull request #7 by sikajs (2014-06-13 05:31:57+00:00)
Title: fix the type of source for members

Members 的 source 應該是 user. 修改前會出現下面類似的錯誤

ActiveRecord::AssociationTypeMismatch at /groups
Group(#70024914946480) expected, got User(#70024912746480)