Ruby on Rails: Create a new record that belongs to another model -

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i have users, have posts.

i want create new post user #1. want using syntax similar option #2, chained original user selection. possible?

option 1 (i know how this):

user = user.find(1) post = post.create(content: "foobar content", user: user)

option 2 (is possible?):

user.find(1).new_post(content: "foobar content")

use build method:

user = user.find(1).posts.build(content: "post content")

in case of has_one relationship, invoke build_association method:

user = user.find(1).build_profile(content: "profile content")

in either event, new child object initialized , associated parent user, however, you'll need save user instance in order preserve association:

user.save

alternatively, same associations can created via create , create_association methods:

user.find(1).posts.create(content: "post content") user.find(1).create_profile(content: "profile content")

neither call requires parent saved – associated child created , saved @ instant respective creation method called.

an important note: both create , create_association methods deprecated in rails 4.


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