★Rails Turtorial：Micropost作成

[yuyanegishi]

def create
      @micropost = current_user.microposts.build(micropost_params)
      if @micropost.save
        flash[:success] = "Micropost created!"
        redirect_to root_url
      else
        @feed_items = []
        render 'static_pages/home'
      end
end

[yuyanegishi]

@micropost = current_user.microposts.build(micropost_params)

def current_user
    if session[:user_id]
      @current_user ||= User.find_by(id: session[:user_id])
    end
end

内容

• インスタンス変数@micropostにcurrent_userに関連付いたmicropostのレコードを作成する。

リファレンス確認　※Ruby on Rails APIにてbuildで検索。

build(attributes = nil, &block)
Alias for: new

new(attributes = nil, &block)

Initializes new record from relation while maintaining the current scope.
Expects arguments in the same format as ActiveRecord::Base.new.