使用ruby将JSON中的内容保存到数据库中

我有一个json文件，如下所示：

{"business_id": "vcNAWiLM4dR7D2nwwJ7nCA", "full_address": "4840 E Indian School Rd\nSte 101\nPhoenix, AZ 85018", "hours": {"Tuesday": {"close": "17:00", "open": "08:00"}, "Friday": {"close": "17:00", "open": "08:00"}, "Monday": {"close": "17:00", "open": "08:00"}, "Wednesday": {"close": "17:00", "open": "08:00"}, "Thursday": {"close": "17:00", "open": "08:00"}}, "open": true, "categories": ["Doctors", "Health & Medical"], "city": "Phoenix", "review_count": 7, "name": "Eric Goldberg, MD", "neighborhoods": [], "longitude": -111.98375799999999, "state": "AZ", "stars": 3.5, "latitude": 33.499313000000001, "attributes": {"By Appointment Only": true}, "type": "business"}
{"business_id": "JwUE5GmEO-sH1FuwJgKBlQ", "full_address": "6162 US Highway 51\nDe Forest, WI 53532", "hours": {}, "open": true, "categories": ["Restaurants"], "city": "De Forest", "review_count": 26, "name": "Pine Cone Restaurant", "neighborhoods": [], "longitude": -89.335843999999994, "state": "WI", "stars": 4.0, "latitude": 43.238892999999997, "attributes": {"Take-out": true, "Good For": {"dessert": false, "latenight": false, "lunch": true, "dinner": false, "breakfast": false, "brunch": false}, "Caters": false, "Noise Level": "average", "Takes Reservations": false, "Delivery": false, "Ambience": {"romantic": false, "intimate": false, "touristy": false, "hipster": false, "divey": false, "classy": false, "trendy": false, "upscale": false, "casual": false}, "Parking": {"garage": false, "street": false, "validated": false, "lot": true, "valet": false}, "Has TV": true, "Outdoor Seating": false, "Attire": "casual", "Alcohol": "none", "Waiter Service": true, "Accepts Credit Cards": true, "Good for Kids": true, "Good For Groups": true, "Price Range": 1}, "type": "business"}

我正在使用以下命令对其进行解析：

require 'json'

req_hash = File.read("test123.json").split("\n").map do |line|
         JSON.parse(line)
       end

a = req_hash.first

---

我想将这个json文件中“business_id”、“review”和“有用”属性下的内容保存到数据库中。如何使用Ruby做到这一点？一个流行的持久性gem是。它处理所有流行的SQL数据库。 根据您使用的数据库，您可能需要安装gem来处理该数据库

下面是一个示例脚本，它设置内存中的sqlite数据库，向其中插入一些数据，然后读取这些数据

require 'json'
require 'sequel'

input = [
  '{"business_id": "vcNAWiLM4dR7D2nwwJ7nCA", "full_address": "4840 E Indian School Rd\nSte 101\nPhoenix, AZ 85018", "hours": {"Tuesday": {"close": "17:00", "open": "08:00"}, "Friday": {"close": "17:00", "open": "08:00"}, "Monday": {"close": "17:00", "open": "08:00"}, "Wednesday": {"close": "17:00", "open": "08:00"}, "Thursday": {"close": "17:00", "open": "08:00"}}, "open": true, "categories": ["Doctors", "Health & Medical"], "city": "Phoenix", "review_count": 7, "name": "Eric Goldberg, MD", "neighborhoods": [], "longitude": -111.98375799999999, "state": "AZ", "stars": 3.5, "latitude": 33.499313000000001, "attributes": {"By Appointment Only": true}, "type": "business"}',
  '{"business_id": "JwUE5GmEO-sH1FuwJgKBlQ", "full_address": "6162 US Highway 51\nDe Forest, WI 53532", "hours": {}, "open": true, "categories": ["Restaurants"], "city": "De Forest", "review_count": 26, "name": "Pine Cone Restaurant", "neighborhoods": [], "longitude": -89.335843999999994, "state": "WI", "stars": 4.0, "latitude": 43.238892999999997, "attributes": {"Take-out": true, "Good For": {"dessert": false, "latenight": false, "lunch": true, "dinner": false, "breakfast": false, "brunch": false}, "Caters": false, "Noise Level": "average", "Takes Reservations": false, "Delivery": false, "Ambience": {"romantic": false, "intimate": false, "touristy": false, "hipster": false, "divey": false, "classy": false, "trendy": false, "upscale": false, "casual": false}, "Parking": {"garage": false, "street": false, "validated": false, "lot": true, "valet": false}, "Has TV": true, "Outdoor Seating": false, "Attire": "casual", "Alcohol": "none", "Waiter Service": true, "Accepts Credit Cards": true, "Good for Kids": true, "Good For Groups": true, "Price Range": 1}, "type": "business"}'
].join("\n")

class Migration
  def migrate!(db, table_name)
    db.create_table?(table_name) do |db|
      primary_key :id
      String :business_id
      # Add other columns here
    end
  end
end

table_name = :reviews
database = Sequel.sqlite

Migration.new.migrate!(database, table_name)

Review = Class.new(Sequel::Model(:reviews))

class DbWriter

  def write_review(hash)
    data = extract_data(hash)
    Review.create(data)
  end

  def extract_data(input)
    {}.tap do |output|
      output[:business_id] = input["business_id"]
      # Insert other wanted data
    end
  end

end

writer = DbWriter.new

input.split("\n").each do |data|
  parsed = JSON.parse(data)
  writer.write_review(parsed)
end

puts Review.all.inspect

# => [
#     #<Review @values={:id=>1, :business_id=>"vcNAWiLM4dR7D2nwwJ7nCA"}>,
#     #<Review @values={:id=>2, :business_id=>"JwUE5GmEO-sH1FuwJgKBlQ"}>
#    ]

require'json'
需要“续集”
输入=[
“{”business_id:“{”vcnawim4dr7d2nwwj7nca“，”完整地址“：”4840 E印第安学校路101\nPhoenix，亚利桑那州85018“，”小时“：{”星期二“{”关闭“：”17:00”，“开放“：”08:00“，”星期五“{”关闭“：”17:00”，“开放“：”08:00“，”星期一“，”星期三“{”关闭“：”17:00”，“开放“：”08:00“，”星期四“{”关闭“，”17:00”，“开放”：“08:00”}，“开放”：真，“类别”：[“医生”，“健康与医疗”]，“城市”：“凤凰城”，“回顾计数”：7，“姓名”：“埃里克·戈德伯格，医学博士”，“社区”：[]，“经度”：-111.983757999999999，“州”：“AZ”，“星”：3.5，“纬度”：33.49931300000001，“属性”：{“仅限预约”：真，，“类型”：“业务”}，
“{”business_id:“JwUE5GmEO-sH1FuwJgKBlQ”，“完整地址：“{}美国51号公路6162号，WI 53532”，“小时：{}，“开放”：true，“类别：“[”餐厅“]，”城市“：”森林“，”回顾计数“，”26，“名称“：”松果餐厅“，”社区“：[]”，经度“：-89.3358439999994，”州“：“WI”，“星星“，”4.0”，“纬度“：”43.238892999997，”属性：{“外卖”：真，“适合”：{“甜点”：假，“深夜”：假，“午餐”：真，“晚餐”：假，“早餐”：假，“早午餐”：假}，“餐饮”：假，“噪音级”：“平均”，“接受预定”：假，“递送”：假，“氛围”：{“浪漫”：假，“亲密”：假，“旅游”：假，“时髦”：假，“迪维”：假，““停车场”{“车库”；“街道”；“验证”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场”；“停车场价格范围“：1}”，类型“：“业务”}”
].join（“\n”）
阶级迁移
def迁移！（数据库，表名称）
db.create_table？（table_name）do|db|
主键：id
字符串：business\u id
#在此处添加其他列
结束
结束
结束
表_name=：评论
数据库=Sequel.sqlite
Migration.new.migrate！（数据库，表名）
Review=Class.new（Sequel:：Model（：reviews））
类DbWriter
def write_review（散列）
数据=提取数据（散列）
查看。创建（数据）
结束
def提取_数据（输入）
{}.点击do |输出|
输出[：业务id]=输入[“业务id”]
#插入其他需要的数据
结束
结束
结束
writer=DbWriter.new
input.split（“\n”）。每个do数据|
parsed=JSON.parse（数据）
writer.write_review（已解析）
结束
把Review.all.inspect放进去
# => [
##1，：business_id=>“vcnawim4dr7d2nwwj7nca”}>，
##2，：business_id=>“JwUE5GmEO-sH1FuwJgKBlQ”}>
#    ]

您可以使用MongoDB，它将文档存储为JSON。下面是一些基本代码，用于连接到数据库并写入和检索条目（假设

业务id

是唯一的）

ruby界面的美妙之处在于，输入和输出的都是列表和散列，因此您可以直接使用它们

注意，您需要运行

mongod

（mongo守护进程）

---

什么数据库？你自己做过什么？我的JSON文件非常大，我有来自同一个数据库的多个评论，所以我尝试对上述属性执行一些操作，并将它们存储在另一个数据库中，这样我就可以用相同的业务id匹配评论。然后我需要执行rm对它们进行了更多的操作。我已经寻找了很长一段时间，但我找不到任何方法。我曾考虑使用mySql之类的东西，但我是ruby noob，所以我不确定如何操作。ruby和数据库上有很多资源，你试过谷歌搜索吗？正如我所说的““我现在一直在寻找很多”，我试着用谷歌搜索，但什么也找不到，这就是我为什么要问这个问题。我现在有很多关于ruby和数据库的资源，但除了datamapper之外，我找不到任何帮助，但我不确定这是否正确。这个模块不是一个类吗？

require 'mongo'

class MongoWriter
  def initialize(host='localhost', port=27017)
    @mongo_client = MongoClient.new(host, port) #connect to the dbhost
    @db = @mongo_client.db("test")              #connect to your database
    @posts = @db["posts"]                       #connect to your collection
  end

  def writepost(post, comments=[])
    #write the entry if "business_id" doesn't exist
    @posts.insert(post) if @posts.find_one({"business_id"=>post["business_id"]}) == nil
  end

  def find(business_id)
    #find a post with "business_id"
    @posts.find_one({"business_id"=>post["business_id"]})
  end
end