如何使用每种方法按类型分隔元素？

I created two scaffolds: announce_sections and announcements. The announce_sections are the types of announcements there are (i.e. games, tryouts, etc) and when I create an announcement I specify what type of announce_sections it is. I'm trying to display it so that each announce_section is viewed, with each announcement and its information under the announce_section. This is what I came up with:I created two scaffolds: announce_sections and