Sqlalchemy - 如果列中不存在则插入表（Mysql）

Question

我有一个像这样的简单表

class Employeecode(Base):
    __tablename__ = 'employeecode'
    id = Column(Integer, primary_key=True)
    unique_code = Column(String(5), unique=True)
    employe_name = Column(String(50))
    designation = Column(String(50))

如果'employeecode'列没有该值，我如何创建一个将值插入'unique_code'表的函数。

insert_unique(unique_code,employe_name,designation)

Answer 1

首先，您可以将所有以前的unicode_value存储在列表中，然后您可以检查并运行查询..

def function(**kwargs):
session = Session()
unique_list =[]
employeecodes = db.session.query(Employeecode).all()
for employee in employeecodes:
    unique_list.append(employee.unique_code)
if kwargs['unique_code'] not in unique_list:
    employee = Employeecode()  
    employee.unique_code = kwargs['unique_code']
    employee.employe_name = kwargs['employe_name']
    employee.designation = kwargs['designation']
    session.commit()
    retval = row2dict(employee)
    session.close()
    return retval
else:
    pass