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我有一個問題&答案功能，我剛剛完成它。我不知道如何在另一個用戶向他們詢問問題時向用戶發送消息的代碼。例如，用戶A向用戶B發送問題，收件箱消息被髮送給用戶B，通知他們他們有新的問題。發送用戶收件箱消息從問答部分
有兩種方式我想如何去做這件事。
方法＃1 消息，將與問題就可以鏈接用戶的頁面，因此可以回答
方法2 的消息中，將包括爲這個問題裏面問。用戶可以回覆將提交的消息作爲他們的答案。
問題控制器：
respond_to :js, :html
def index
@questions = Question.all
respond_with(@questions)
end
def show
@question = Question.find(params[:id])
@questions = Question.order("created_at DESC")
respond_with(@questions)
end
def new
@question = Question.new
respond_with(@question)
end
def create
@question = Question.new(params[:question])
if @question.save
redirect_to questions_path, notice: 'Your question was saved successfully. Thanks!'
else
render :new, alert: 'Sorry. There was a problem saving your question.'
end
end
end
答案控制器：
def new
@question = Question.find(params[:question_id])
end
def create
@question = Question.find(params[:question_id])
if @question.update_attributes(params[:question])
redirect_to questions_path
else
render :new
end
end
end
消息控制器：
before_filter :set_user
def index
if params[:mailbox] == "sent"
@messages = @user.sent_messages
elsif params[:mailbox] == "inbox"
@messages = @user.received_messages
#elsif params[:mailbox] == "archived"
# @messages = @user.archived_messages
end
if params[:mailbox] == "unread"
@messages = @user.unread_messages
end
end
def new
@message = Message.new
if params[:reply_to]
@reply_to = User.find_by_sender_id(params[:reply_to])
unless @reply_to.nil?
@message.recipient_id = @reply_to.sender_id
end
end
end
def create
@message = Message.new(params[:message])
@message.sender_id = @user.id
if @message.save
flash[:notice] = "Message has been sent"
redirect_to user_messages_path(current_user, :mailbox=>:inbox)
else
render :action => :new
end
end
def show
@message = Message.find(params[:id])
@message.readingmessage if @message.recipient == current_user
end
def destroy
@message = Message.find(params[:id])
@message.destroy
flash[:notice] = "Successfully deleted message."
redirect_to user_messages_path(@user, @messages)
end
def delete_multiple
if params[:delete]
params[:delete].each { |id|
@message = Message.find(id)
@message.mark_message_deleted(@message.id,@user.id) unless @message.nil?
}
flash[:notice] = "Messages deleted"
end
redirect_to user_messages_path(@user, @messages)
end
private
def set_user
@user = current_user
end
end
消息模型：
attr_accessible :subject, :body, :sender_id, :recipient_id, :read_at,:sender_deleted,:recipient_deleted
validates_presence_of :subject, :message => "Please enter message title"
has_many :notifications, as: :event
scope :unread, -> {where('read_at IS NULL')}
scope :not_deleted_by_recipient, where('messages.recipient_deleted IS NULL OR messages.recipient_deleted = ?', false)
scope :not_deleted_by_sender, where('messages.sender_deleted IS NULL OR messages.sender_deleted = ?', false)
belongs_to :sender,
:class_name => 'User',
:foreign_key => 'sender_id'
belongs_to :recipient,
:class_name => 'User',
:foreign_key => 'recipient_id'
# marks a message as deleted by either the sender or the recipient, which ever the user that was passed is.
# When both sender and recipient marks it deleted, it is destroyed.
def mark_message_deleted(id,user_id)
self.sender_deleted = true if self.sender_id == user_id
self.recipient_deleted = true if self.recipient_id == user_id
(self.sender_deleted && self.recipient_deleted) ? self.destroy : self.save!
end
# Read message and if it is read by recipient then mark it is read
def readingmessage
self.read_at ||= Time.now
save
end
# Based on if a message has been read by it's recipient returns true or false.
def read?
self.read_at.nil? ? false : true
end
def self.received_by(user)
where(:recipient_id => user.id)
end
def self.not_recipient_deleted
where("recipient_deleted = ?", false)
end
def self.sent_by(user)
Message.where(:sender_id => user.id)
end
def previous(same_recipient = true)
collection = Message.where('id <> ? AND created_at > ?', self.id, self.created_at).order('created_at ASC')
collection = collection.where(recipient_id: self.recipient_id) if same_recipient
collection = collection.not_deleted_by_recipient
collection.first
end
def next(same_recipient = true)
collection = Message.where('id <> ? AND created_at < ?', self.id, self.created_at).order('created_at DESC')
collection = collection.where(recipient_id: self.recipient_id) if same_recipient
collection = collection.not_deleted_by_recipient
collection.first
end
end
private
def send_notification(message)
message.notifications.create(user: message.recipient)
end