我是使用Slim的新手，并且在向视图中添加条件时不断收到语法错误。我在User模型中添加了一个实例方法，因此可以在视图中运行此条件。
_conversation.html.slim：
- if user.paid?
- sender = conversation.last_sender
- message = conversation.last_message
- receipts = conversation.receipts.recipient(@user).is_unread
- is_unread = receipts.count > 0 ? true : false
.outer
div.converation class="#{is_unread == true ? 'unread' : 'read'}" onclick="#" data-href="#{conversation_path(conversation)}"
.col_1
img alt="" src="#{is_unread == true ? '/assets/un_read.png' : '/assets/read.png'}" /
span.conversation_avatar
=link_to "/profile/#{sender.id}" do
img alt="" src="#{sender.avatar.image_url(:avatar)}" /
h5 = sender.username
strong
= sender.age
',
= sender.gender
',
= sender.sexuality
small
br
= sender.location.city
',
= sender.location.state
.col_2
span = message.subject
p = message.body
.col_3
strong = extract_date(message.created_at)
small = extract_time(message.created_at)
form action="#"
fieldset
input type="checkbox" class="conversation_checkbox"
- else
Text would go here
缩进在Slim中非常重要。您没有在第一行缩进任何内容if user.paid?；您需要这样做，或者您正在生成if没有内容的声明。
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