在邮件程序中使用设计方法“ current_user”

Question

am relatively new to rails,i have been working with devise authentication gem for a while now,but my problem is,my app sends an email,with the firstname and lastname of the current user after a form is filled,but each time i try to send the email with the above stated parameters i get an error that says "undefined method current_user" my mailer looks like this,note:its a separate controller that controls it.

<table>
<tr>
<td>name</td><td><%= current_user.firstname %><%=current_user.firstname  %></td>

<tr>

        <td>phone no.</td><td><%= current_user.phone %></td>

    </tr>

    <tr>

        <td>location</td><td><%= @device.location %></td>

    </tr>

    <tr>

        <td>device type</td><td><%= @device.device_type %></td>

    </tr>

    <tr>

        <td>brand</td><td><%= @device.brand %></td>

    </tr>

</table>

my controller action is this

def create

    @user=current_user

    @device = Device.new(device_params)

        if @device.save

            DeviceMailer.send_device.deliver

            flash[:notice] = 'Request sent successfully,you will be

contacted shortly' else flash[:error] ='Request not sent,check details and sendagain' render 'new' end

end

Answer 1

current_user is a method that is available only to views and controllers. If you want to use it in a mailer or model, it will have to be explicitly used as an argument for the mailer method.

Inside the controller create method:

DeviceMailer.send_device(current_user, @device).deliver

Mailer method:

def send_device(user, device)
  @user = user
  @device = device
  # More code as needed
end

Mailer view:

<table>
  <tr>
    <td>name</td>
    <td><%= @user.firstname %><%= @user.firstname  %></td>
  </tr>
  <tr>
    <td>phone no.</td><td><%= @user.phone %></td>
  </tr>
  <tr>
    <td>location</td><td><%= @device.location %></td>
  </tr>
  <tr>
    <td>device type</td><td><%= @device.device_type %></td>
  </tr>
  <tr>
    <td>brand</td><td><%= @device.brand %></td>
  </tr>
</table>

Answer 2

current_user is set when you login. In order to force the user to login before the user can execute a controller action you need to have the following line at the top of your controller:

before_action :authenticate_user!