django 动态查询表结构相同表名不同数据的Model实现
class TemplateModel(models.Model):
id = models.AutoField(primary_key=True)
name = models.CharField(max_length=50)
class Meta:
abstract = True
class NewDynamicModel(object):
_instance = dict()
def __new__(cls, base_cls, tb_name):
"""
创建类
:param base_cls: 类名
:param tb_name: 表名
:return:
"""
new_cls_name = "%s_To_%s" % (base_cls.__name__, '_'.join(map(lambda x: x.capitalize(), tb_name.split('_'))))
if new_cls_name not in cls._instance:
new_meta_cls = base_cls.Meta
new_meta_cls.db_table = tb_name
model_cls = type(str(new_cls_name), (base_cls,),
{'__tablename__': tb_name, 'Meta': new_meta_cls, '__module__': cls.__module__})
cls._instance[new_cls_name] = model_cls
return cls._instance[new_cls_name]
# 使用
Test_2017 = NewDynamicModel(TemplateModel, 'tb_test_2018')
print Test_2018.objects.all()
原文:django 动态查询表结构相同表名不同数据的Model实现