后台管理页面的数据问题及500修改

db/migrate/20200525021613_add_index_for_project_language_and_category.rb

@@ -0,0 +1,18 @@
+class AddIndexForProjectLanguageAndCategory < ActiveRecord::Migration[5.2]
+  def change
+    add_index  :project_categories, :id unless index_exists?(:project_categories, :id)
+    add_index  :project_laguages, :id unless index_exists?(:project_laguages, :id)
+
+    project_categories = ProejctCategory.includes(:projects)
+    project_categories.each do |i|
+      puts "#######____update_project_category_id____##############{i.id}"
+      ProejctCategory.reset_counters(i, :projects)
+    end
+
+    project_languages = ProjectLanguage.includes(:projects)
+    project_languages.each do |i|
+      puts "#######____update_project_language_id____##############{i.id}"
+      ProjectLanguage.reset_counters(i, :projects)
+    end
+  end
+end