class ConnectDb:
"""
利用records連接數據庫
"""
@staticmethod
def connect(filepath=None) -> records.Database:
"""
:param filepath: 配置文件
:return: <Database open=True> 數據庫對象
"""
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://用戶名:密碼@sqlURl:sql端號/庫名')
connect = records.Database(db_url)
return connect
def insert_run_record(self, project_name, device_sn, device_static, run_value):
"""
插入數據
:param project_name: 項目名稱，取config文件中的項目名稱，字段 PROJECTNAME
:param device_sn: 設備號
:param device_static: 設備狀態
:param run_value: 運行內容
"""
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運行失敗" + str(e))
def select_run_value(self, device_sn) -> str:
"""
通過設備編號查詢最新一條運行數據的內容
:param device_sn: 設備sn
:return: 運行內容
"""
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("執行sql失敗" + str(e))需要依賴包PyMySQL 和 records
利用records連接數據庫，需要安裝records插件，records.Database連接數據庫，返回Database對象，主要用到records.Database.query來進行插入數據，查詢數據等操作
插入數據只需要設置相應的字段值：value，在sql的insert中的values中用(：字段值)來直接讀取相應的value，當sql語句中存在查詢其他表獲得的值時，需要在sql中拼接相應的select，如上所示。
查詢語句，拼接好sql好，執行connect.query(sql) 返回<RecordCollection size=0 pending=True>類的對象，該對象有三個常用的方法all/first/one，這三個方法都可以添加參數as_dict=True(將結果轉化爲字典) as_ordereddict=True（結果轉化爲字典並進行排序），其中all是返回所有的，first是第一個結果，one是唯一一個