Question

我是Rails的新手，目前正在开发一个博客。我想知道是否有关于如何使用Acts作为线程可评论的教程，因为GitHub中使用的唯一指令是将acts_as_commentable添加到模型中。

我应该如何为新评论创建表单？
如何从模型中检索所有评论？
如何配置路线以显示评论？
如何修改控制器以使此功能可用？

class Comment < ActiveRecord::Base
acts_as_nested_set :scope => [:commentable_id, :commentable_type]
#attr_accessible :commentable, :body, :user_id
validates :body, :presence => true
validates :user, :presence => true

# NOTE: install the acts_as_votable plugin if you
# want user to vote on the quality of comments.
#acts_as_votable

belongs_to :commentable, :polymorphic => true

# NOTE: Comments belong to a user
belongs_to :user

# Helper class method that allows you to build a comment
# by passing a commentable object, a user_id, and comment text
# example in readme
def self.build_from(obj, user_id, comment)
new \
  :commentable => obj,
  :body        => comment,
  :user_id     => user_id
end

#helper method to check if a comment has children
def has_children?
   self.children.any?
end

# Helper class method to lookup all comments assigned
# to all commentable types for a given user.
scope :find_comments_by_user, lambda { |user|
where(:user_id => user.id).order('created_at DESC')
}

# Helper class method to look up all comments for
# commentable class name and commentable id.
scope :find_comments_for_commentable, lambda { |commentable_str, commentable_id|
where(:commentable_type => commentable_str.to_s, :commentable_id =>   commentable_id).order('created_at DESC')
}

# Helper class method to look up a commentable object
# given the commentable class name and id
def self.find_commentable(commentable_str, commentable_id)
  commentable_str.constantize.find(commentable_id)
end
end

Answer 1

您是否通过github中的以下链接

https://github.com/jackdempsey/acts_as_commentable

通过调用此命令，它将自动创建带有迁移的表单。

rails g comment

您只需要运行迁移。

您使用的是哪个Rails版本？

使用线程示例作为可评论的行为

1 个答案: