如何遍历所有记录并将数据库值传递给变量?
我有两个表,“Que”和“Opts”。
我想遍历Que中的所有记录并将它们添加到变量rikt_nr
, start_nr
和end_nr
,因为它们将位于URL的末尾,如下所示:
api.url.number=8-00001
如何让它迭代通过Que并将rikt_nr
, start_nr
和end_nr
传递给其余的代码?
Que表包含以下字段:
create_table "ques", force: true do |t| t.integer "rikt_nr" t.integer "start_nr" t.integer "end_nr" t.datetime "created_at" t.datetime "updated_at" end
和Opts有这些领域:
create_table "opts", force: true do |t| t.string "numbers" t.string "operator" t.datetime "created_at" t.datetime "updated_at" end
这是代码:
Que.all.each do | que | url = "http://api.url.number=" que.rikt_nr = rikt_nr que.start_nr = start_nr que.end_nr = end_nr st_en = start_nr..end_nr st_en.each do |nr| full_url = "#{url}" + rikt_nr.to_s + "-"+ nr.to_s doc = Nokogiri::XML(open(full_url)) number = doc.at('Number').text operator = doc.at('Name').text number_operator = "#{number}" + ";" + " #{operator}" number_operator save = @opts.create(:numbers => number, :operator => operator) end end
我刚发现了这个。
问题出在这里:
que.rikt_nr = rikt_nr que.start_nr = start_nr que.end_nr = end_nr st_en = start_nr..end_nr
所以我改成了:
Que.all.each do | que | url = "http://api.url.number=" st_en = que.start_nr..que.end_nr st_en.each do |nr| full_url = "#{url}" + que.rikt_nr.to_s + "-"+ nr.to_s doc = Nokogiri::XML(open(full_url)) number = doc.at('Number').text operator = doc.at('Name').text number_operator = "#{number}" + ";" + " #{operator}" number_operator save = @opts.create(:numbers => number, :operator => operator) end end
它现在有效。