我有一个问答功能，我即将完成它。当另一个用户问他们问题时，我不知道如何执行向用户发送消息的代码。例如，用户 A 向用户 B 发送一个问题，一个收件箱消息被发送给用户 B，通知他们有一个新问题。
我认为有两种方法可以解决这个问题。
方法 #1 在消息中，它将用户链接到带有问题的页面，以便可以回答
方法#2 在消息中，它将包含被问到的问题。用户可以回复将作为他们的答案提交的消息。
问题控制器：
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