修改fork_user.json.jbuilder

app/views/projects/fork_users.json.jbuilder

@@ -2,7 +2,7 @@ json.count @fork_users.size
 json.fork_users do 
   json.array! @fork_users.each do |f|
     user = f.user 
-    fork_project = Project.select(:id,).find_by(f.fork_project_id)
+    fork_project = Project.select(:id,:fork_project_id,:name).find_by(id: f.fork_project_id)
     json.id f.fork_project_id
     json.name "#{user.try(:show_real_name)}/#{fork_project.name}"
     json.login user.try(:login)

app/views/projects/watch_users.json.jbuilder

@@ -1,4 +1,4 @@
-json.cout @watch_users.size 
+json.cout @watchers.size 
 json.watchers do 
-  json.partial! "/projects/list_user", collection: @watch_user, as: :target
+  json.partial! "/projects/list_user", collection: @watchers, as: :target
 end

db/migrate/20200515082628_create_fork_users.rb

@@ -9,7 +9,7 @@ class CreateForkUsers < ActiveRecord::Migration[5.2]
     add_index :fork_users, :project_id
     add_index :fork_users, :user_id
 
-    projects = Project.where.not(forked_from_project_id: [nil, ""])
+    projects = Project.where("forked_from_project_id is not null")
     projects.each do |p|
       ForkUser.create(project_id: p.forked_from_project_id, fork_project_id: p.id, user_id: p.user_id)
     end