南方是否处理模型混合？

问题描述

我已经在某些模型中创建了一个mixin并继承自它。问题是当我创建模式迁移时，mixin的字段在那里。

  class MyMixin（object）：
 a_field = models.CharField（max_length = 30，blank = True）
 another_field = models.DateTimeField（blank = True，null = True）
 
 class Meta：
 abstract = True 
 
 
 class MyModel .Model，myMixin）：
 ... 
  

任何想法？

解决方案

似乎已经使用以下

  class MyMixin（models.Model）：
 a_field = models.CharField（max_length = 30，blank = True）
 another_field = models.DateTimeField（blank = True，null = True）
 
 class Meta：
 abstract = True 
 
 
 class MyModel（myMixin，models.Model）：
 ... 
  

更改是：

• MyMixin继承模型而不是对象（尽管围绕这个地方的许多讨论说，django的mixins应该继承对象而不是模型） / li>
  
• MyModel的继承顺序 - mixin必须先到达

I've created a mixin and inherited from it in some models. The problem is when I create a schema migration, the mixin's fields are there.

class MyMixin(object):
    a_field = models.CharField(max_length=30, blank=True)
    another_field = models.DateTimeField(blank=True, null=True)

    class Meta:
        abstract = True


class MyModel(models.Model, myMixin):
    ...

Any ideas?

解决方案

Seem to have got it working using the following

class MyMixin(models.Model):
    a_field = models.CharField(max_length=30, blank=True)
    another_field = models.DateTimeField(blank=True, null=True)

    class Meta:
        abstract = True


class MyModel(myMixin, models.Model):
    ...

The changes are:

• MyMixin inherits Model rather than object (despite many discussions around the place saying that mixins for django should inherit object rather than Model)
• the order of inheritance for MyModel - the mixin has to come first

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