Error : ArgumentError in Messages#new wrong number of arguments (2 for 1)

Question

我在消息中收到 ArgumentError#new app/views/messages/new.html.erb 第 16 行提出： "wrong number of arguments (2 for 1)" 它还说：

app/helpers/application_helper.rb:8:在 avatar_url' app/helpers/messages_helper.rb:5:in 块中 recipients_options' app/helpers/messages_helper.rb:4:在 recipients_options' app/views/messages/new.html.erb:16:in 块中 _app_views_messages_new_html_erb___264831154_80406348' app/views/messages/new.html.erb:3:在`_app_views_messages_new_html_erb___264831154_80406348'

我的申请助手：

module ApplicationHelper

def page_header(text)
    content_for(:page_header) { text.to_s }
end


def avatar_url(user)
    if user.image
        user.image
    else
        "/images/missing.png"
    end
end
end

我的消息助手是，

module MessagesHelper


def recipients_options(chosen_recipient = nil)
    s = ''
    User.all.each do |user|
      s << "<option value='#{user.id}' data-img-src='#{image_tag avatar_url(user.email, size: 50)}' #{'selected' if user == chosen_recipient}>#{user.name}</option>"
    end
    s.html_safe
  end
end

我的 messages/new.html.erb 是，

<% page_header "Start Conversation" %>

<%= form_tag messages_path, method: :post do %>
  <div class="form-group">
    <%= label_tag 'message[subject]', 'Subject' %>
    <%= text_field_tag 'message[subject]', nil, class: 'form-control', required: true %>
  </div>

  <div class="form-group">
    <%= label_tag 'message[body]', 'Message' %>
    <%= text_area_tag 'message[body]', nil, cols: 3, class: 'form-control', required: true %>
  </div>

  <div class="form-group">
    <%= label_tag 'recipients', 'Choose recipients' %>
    <%= select_tag 'recipients', recipients_options(@chosen_recipient), multiple: true, class: 'form-control chosen-it' %>
  </div>

  <%= submit_tag 'Send', class: 'btn btn-primary' %>
<% end %>

messages_controller.rb

class MessagesController < ApplicationController


 before_action :authenticate_user!

  def new
    @chosen_recipient = User.find_by(id: params[:to].to_i) if params[:to]
  end

  def create
    recipients = User.where(id: params['recipients'])
    conversation = current_user.send_message(recipients, params[:message][:body], params[:message][:subject]).conversation
    flash[:success] = "Message has been sent!"
    redirect_to conversation_path(conversation)
  end
end

Answer 1

在 #{image_tag avatar_url(user.email, size: 50)} 下你传递了两个参数，但是 def avatar_url(user) 只需要一个。

Answer 2

您定义了接受一个参数的 avatar_url，但您向它传递了两个参数

avatar_url(user.email, size: 50)