# -*- coding:utf-8 -*-import os,sysBASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))sys.path.append(BASE_DIR)os.environ['DJANGO_SETTINGS_MODULE'] = 'dbtest.settings'import djangodjango.setup()from db.models import asset,server#获取标的某个字段的值ret = asset.objects.all() # 不会去链接数据库# 当真正用的时候才去链接数据库for r in ret: print(r.sn)# 创建了一个tcp链接，执行的sql语句：# SELECT `db_asset`.`id`, `db_asset`.`sn`, `db_asset`.`money`, `db_asset`.`addtime` FROM `db_asset`; args=()ret1 = asset.objects.values('sn','money').get(sn='cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c3')print(ret1)# (0.001) SELECT `db_asset`.`sn`, `db_asset`.`money` FROM `db_asset` WHERE `db_asset`.`sn` = 'cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c3'; args=('cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c3',)# {'money': 5000.0, 'sn': u'cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c3'}# ret2 = asset.objects.get(sn='cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c3').values('sn','money') # 错误# print(ret2)ret3 = asset.objects.values('sn','money').filter(money=5000)print(ret3)# (0.001) SELECT `db_asset`.`sn`, `db_asset`.`money` FROM `db_asset` WHERE `db_asset`.`money` = 5000 LIMIT 21; args=(5000.0,)# <QuerySet [{'money': 5000.0, 'sn': u'cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c3'}]>ret4 = asset.objects.values('sn','money')print(ret4)# (0.001) SELECT `db_asset`.`sn`, `db_asset`.`money` FROM `db_asset` LIMIT 21; args=()# <QuerySet [{'money': 1000.0, 'sn': u'cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c8'}, {'money': 2000.0, 'sn': u'cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c1'}, {'money': 1500.0, 'sn': u'cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c2'}, {'mo# ney': 5000.0, 'sn': u'cb984b6b-0ef9-46ea-b7be-dbe68eb4f2c3'}]>