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| class Micropost < ActiveRecord::Base | |
| before_save { } | |
| belongs_to :user | |
| default_scope -> { order('created_at DESC') } | |
| validates :content, presence: true, length: { maximum: 140 } | |
| validates :user_id, presence: true | |
| # Returns microposts from the users being followed by the given user. | |
| def self.from_users_followed_by(user) | |
| followed_user_ids = "SELECT followed_id FROM relationships | |
| WHERE follower_id = :user_id" | |
| where("user_id IN (#{followed_user_ids}) OR user_id = :user_id", | |
| user_id: user.id) | |
| end | |
| end |