python之在 for 循环中的 django admin 中创建另一个模型对象

我是 django 的新手，之前是一名 php 编码员，所以如果我很笨，请多多包涵。 我在我的应用程序中定义了三个模型，理解、问题、答案。每个理解都有多个在理解模型中定义为“内联”的问题和答案。问题由管理员直接输入，但答案会根据理解自动添加。 我想要实现的是，将理解分解为句子，并将每个句子添加为具有当前理解外键的答案对象。 我正在尝试覆盖 Comprehension 模型中的保存方法。但是当我点击保存时，它给出了一个实例错误

Cannot assign "23L": "Answer.ComprehensionAnswer" must be a "Comprehension" instance. 

如何在此处分配/创建和实例化？还是我采用了错误的方法。如果是这样，请指导我采用正确的方法。

以下是models.py的内容

class Question(models.Model): 
    QuestionText = models.CharField(max_length=500, verbose_name='Question Text') 
    QuestionTypeID = models.ManyToManyField(QuestionType, verbose_name='Question Type') 
    ComprehensionQuestion = models.ForeignKey(Comprehension, verbose_name='comprehension') 
    QuestionRemarks = models.CharField(max_length=500, verbose_name='remarks', null=True, blank=True) 
    LastUpdate = models.DateTimeField(auto_now=True) 
    def __unicode__(self): 
       return self.QuestionText 
    def was_published_recently(self): 
       return self.LastUpdate >= timezone.now() - datetime.timedelta(1) 
 
class Answer(models.Model): 
    AnswerText = models.CharField(max_length=500, verbose_name='Answer Text') 
    AnswerTypeID = models.ManyToManyField(AnswerType, verbose_name='Answer Type') 
    ComprehensionAnswer = models.ForeignKey(Comprehension, verbose_name='Comprehension', null=True, blank=True) 
    AnswerRemarks = models.CharField(max_length=500, verbose_name='Remarks') 
    LastUpdate = models.DateTimeField(auto_now=True) 
    def __unicode__(self): 
       return self.AnswerText 
 
class Comprehension(models.Model): 
    ComprehensionTitle = models.CharField(max_length=100, verbose_name='Comprehension Title') 
    ComprehensionsText = models.TextField(verbose_name='Text') 
    ComprehensionsRemarks = models.CharField(max_length=400, verbose_name='Remarks for this Comprehension', null=True,  blank=True) 
    LastUpdate = models.DateTimeField("Last Updated", auto_now=True) 
    def __unicode__(self): 
       return self.ComprehensionTitle 
    def was_published_recently(self): 
       return self.LastUpdate >= timezone.now() - datetime.timedelta(1) 
 
    def save(self, *args, **kwargs): 
       #overrides the default save function to split the comprehension paragraph into sentences and adds them as probable answers 
       AnswerList = self.ComprehensionsText.split("u'\u0964'") 
 
    for sentence in AnswerList: 
        p = Answer.objects.create(AnswerText = sentence, ComprehensionAnswer = self.pk) 
 
    super(Comprehension, self).save(*args, **kwargs) 

admin.py里面的内容

class ComprehensionAdmin(admin.ModelAdmin): 
    form = ComprehensionForm 
    fieldsets = [ 
    ('Main', {'fields': ['ComprehensionTitle','ComprehensionsText']}), 
    ('Additional Info', {'fields': ['ComprehensionsRemarks'], 'classes': ['collapse']}), 
    ] 
    inlines = [QuestionInline, AnswerInline] 
    list_display = ('ComprehensionTitle', 'LastUpdate') 
    list_per_page = 10 
 
 
class QuestionInline(admin.TabularInline):  
    model = Question 
    extra = 2 
 
class AnswerInline(admin.TabularInline):    
    model = Answer 
    extra = 2 
 
admin.site.register(Question) 
admin.site.register(Answer) 
admin.site.register(Comprehension, ComprehensionAdmin) 

我也遵循了这个 page 中提到的方法.但是，对于如何使用 Comprehension 模型的外键创建处于提交状态的对象，却一片空白。

请您参考如下方法:

您应该使用 self 而不是 self.pk 并注意 self 引用当前对象。

p = Answer.objects.create(AnswerText = sentence, ComprehensionAnswer = self) 

从回溯中可以清楚地看出，Answer 模型的ComprehensionAnswer 属性需要Comprehension 模型的对象。但是您正在传递该对象的 ID。