[RUBY] [Form with two arguments] rails, form_for / form_with arguments

【goal】

【merit】

■ Understanding form ■ Understanding the association

【Development environment】

■ Mac OS catalina ■ Ruby on Rails (5.2.4.2) ■ Virtual Box:6.1 ■ Vagrant: 2.2.7

In the curriculum

form_for[@post, @comment].....

Hmm?

up until this point, form_for(@post）....

There was one argument, why two? ?? ??

The reason is that you have to pass two arguments.

In this case, because it is ** association **

Post: comment = 1: Many

So we need to give a value to both post and comment ...

So

Become form_for [@post, @comment] !!!!

that's all, If you have any corrections, please FB! !!

[I want to read it together]

■ About comment function implementation https://qiita.com/tanaka-yu3/items/93d94b1ede8fb4be2981

■ About form_with https://qiita.com/tanaka-yu3/items/50f54f5d4f4b8dfe19f3

■ Method list https://qiita.com/tanaka-yu3/items/89abad875187494bec53