来自Django文档（ 1 ， 2 ）：

From the Django docs (1, 2):

主键字段是只读的。如果更改现有对象上的主键的值然后保存，则将与旧对象一起创建一个新对象。

The primary key field is read-only. If you change the value of the primary key on an existing object and then save it, a new object will be created alongside the old one.

问题出在模型对象的类定义中。



将primary_key字段设置为 AutoField 后，问题就消失了。


我的新模型定义如下：

The issue was in the model object's class definition.

Once I set the primary_key field to an AutoField, the issue went away.

My new model definition is as follows:

class Meal(models.Model):
        mealid = models.AutoField(db_column='MealId', primary_key=True)
        name = models.CharField(db_column='Name', max_length=45, blank=True)
        description = models.CharField(db_column='Description', max_length=200, blank=True)

Django完美的自动生成功能！

An almost perfect auto-generation by Django!