增加语言搜索

app/controllers/hacks_controller.rb

@@ -232,6 +232,11 @@ class HacksController < ApplicationController
       hacks = hacks.where(category: params[:category])
     end
 
+    # 语言
+    if params[:language]
+      hacks = hacks.joins(:hack_codes).where(hack_codes: {language: params[:language]})
+    end
+
     # 排序
     sort_by = params[:sort_by] || "hack_user_lastest_codes_count"
     sort_direction = params[:sort_direction] || "desc"