Question

目前我正在浏览Django的 Writing your first Django app, part 2 。

一切都很顺利，但只有一个问题。创建模型时，我无法在编辑和保存时更新管理区域内的问题文本的值。它只显示我在shell中设置的默认值（What's new？），其中包含以下内容：

q = Question(question_text="What's new?", pub_date=timezone.now())

models.py：

from django.db import models

class Question(models.Model):
    question_text = models.CharField(max_length = 200)
    pub_date = models.DateTimeField('date published')

class Choice(models.Model):
    question = models.ForeignKey(Question)
    choice_text = models.CharField(max_length = 200)
    votes = models.IntegerField(default = 0)

admin.py：

from django.contrib import admin

from .models import Choice, Question

class ChoiceInline(admin.TabularInline):
    model = Choice
    extra = 3

class QuestionAdmin(admin.ModelAdmin):
    fieldsets = [
    (None,                  {'fields': ['question_text']}),
    ('Date information',    {'fields': ['pub_date'], 'classes': ['collapse']}),
    ]
    inlines = [ChoiceInline]

admin.site.register(Question, QuestionAdmin)

我有没有做错的事情？

Answer 1

我现在明白了。我错过了向问题和选择添加__str__()方法。

所以它没有返回 choice_text 或 question_text 。

模型现在看起来像这样：

from django.db import models

class Question(models.Model):
    question_text = models.CharField(max_length = 200)
    pub_date = models.DateTimeField('date published')
    def __str__(self):
        return self.question_text

class Choice(models.Model):
    question = models.ForeignKey(Question)
    choice_text = models.CharField(max_length = 200)
    votes = models.IntegerField(default = 0)
    def __str__(self):
        return self.choice_text

Django的管理区域中的模型值不会改变

1 个答案: