新增：需要登录

app/views/api/v1/users/memos/_memo.json.jbuilder

@@ -7,7 +7,7 @@ json.forum_section_title memo.forum_section_title
 json.id memo.id
 json.is_fine memo.is_fine
 json.is_original memo.is_original
-json.memo_watched @current_user.watched?(memo)
+json.memo_watched current_user.watched?(memo)
 json.new_reply memo.new_reply
 json.praises_count memo.praises_count
 json.published_time memo.published_at.strftime("%Y-%m-%d %H:%M:%S")

app/views/api/v1/users/memos/index.json.jbuilder

@@ -3,5 +3,5 @@ json.resident_expert do
   json.partial! 'api/v1/resident_experts/resident_expert', locals: { resident_expert: @resident_expert } 
 end
 json.memos do |memo|
-  json.partial! 'api/v1/users/memos/memo', locals: { memo: memo } 
+  json.partial! 'api/v1/users/memos/memo', locals: { memo: memo, current_user: current_user } 
 end