One-to-Many Associations

We connect models by using foreign key columns. Here's how a post might be associated with its comments:

POSTS

id user_id content
97 1201 Today I had the best ice cream! ...
98 672 Anybody else going to the Cubs game?

COMMENTS

id post_id user_id content
301 97 812 Strawberry is the best flavor IMO
303 98 2305 Wish I could go with you
304 98 1208 Yup I'll be right behind home plate
302 97 498 No way, mint chocolate chip LOL