创建文件的修改及其他后端bug

app/views/projects/index.json.jbuilder

@@ -1,26 +1,29 @@
 json.total_count @total_count
 json.projects do
   json.array! @projects.to_a do |project|
-    json.partial! 'project', project: project
-    json.author do
-      json.name project.owner.try(:show_real_name)
-      json.login project.owner.login
-      json.image_url url_to_avatar(project.owner)
-    end
-    json.category do
-      if project.project_category.blank?
-        json.nil!
-      else
-        json.id project.project_category.id
-        json.name project.project_category.name
+    user = project.owner
+    if user.present?
+      json.partial! 'project', project: project
+      json.author do
+        json.name user.try(:show_real_name)
+        json.login user.login
+        json.image_url url_to_avatar(project.owner)
       end
-    end
-    json.language do
-      if project.project_language.blank?
-        json.nil!
-      else
-        json.id project.project_language.id
-        json.name project.project_language.name
+      json.category do
+        if project.project_category.blank?
+          json.nil!
+        else
+          json.id project.project_category.id
+          json.name project.project_category.name
+        end
+      end
+      json.language do
+        if project.project_language.blank?
+          json.nil!
+        else
+          json.id project.project_language.id
+          json.name project.project_language.name
+        end
       end
     end
   end