class ConnectDb:
"""
利用records连接数据库
"""
@staticmethod
def connect(filepath=None) -> records.Database:
"""
:param filepath: 配置文件
:return: <Database open=True> 数据库对象
"""
if filepath is None:
file = INIFILEPATH
else:
file = filepath
host = Readini.getvalue("Database", "dbhost", file)
port = Readini.getvalue("Database", "dbport", file)
user = Readini.getvalue("Database", "dbusername", file)
passwd = Readini.getvalue("Database", "dbpasswd", file)
db = Readini.getvalue("Database", "dbname")
db_url = 'mysql+pymysql://' + user + ':' + passwd + '@' + str(host) + ':' + str(port) + '/' + db
# connect = records.Database('mysql+pymysql://用户名:密码@sqlURl:sql端号/库名')
connect = records.Database(db_url)
return connect
def insert_run_record(self, project_name, device_sn, device_static, run_value):
"""
插入数据
:param project_name: 项目名称，取config文件中的项目名称，字段 PROJECTNAME
:param device_sn: 设备号
:param device_static: 设备状态
:param run_value: 运行内容
"""
try:
value = {
'device_sn': device_sn,
'device_static': device_static,
'run_value': run_value,
'create_time': datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
}
connect.query(
"insert into selenium_chanpin_znsd_runvalue(project_id, device_sn,device_static,run_value,create_time) "
"values(:project_id," +
"(SELECT project_id FROM selenium_project where project_name = '" + project_name + "')" +
",:device_static, :run_value, :create_time)", **value)
except Exception as e:
print("sql运行失败" + str(e))
def select_run_value(self, device_sn) -> str:
"""
通过设备编号查询最新一条运行数据的内容
:param device_sn: 设备sn
:return: 运行内容
"""
try:
select_value_sql = "SELECT run_value FROM selenium_chanpin_znsd_runvalue where device_sn='" + device_sn + \
" 'ORDER BY create_time DESC limit 1"
rows = connect.query(select_value_sql)
return rows.first(as_ordereddict=True)["run_value"]
except Exception as e:
print("执行sql失败" + str(e))需要依赖包PyMySQL 和 records
利用records连接数据库，需要安装records插件，records.Database连接数据库，返回Database对象，主要用到records.Database.query来进行插入数据，查询数据等操作
插入数据只需要设置相应的字段值：value，在sql的insert中的values中用(：字段值)来直接读取相应的value，当sql语句中存在查询其他表获得的值时，需要在sql中拼接相应的select，如上所示。
查询语句，拼接好sql好，执行connect.query(sql) 返回<RecordCollection size=0 pending=True>类的对象，该对象有三个常用的方法all/first/one，这三个方法都可以添加参数as_dict=True(将结果转化为字典) as_ordereddict=True（结果转化为字典并进行排序），其中all是返回所有的，first是第一个结果，one是唯一一个