Question

我的models.py是

class Question(models.Model):
    question_text = models.CharField(max_length= 100)
    pub_date = models.DateTimeField('Date Is Published')
    image = models.ImageField(upload_to="Question_Image", blank=True)

    def __str__(self):
        return self.question_text

并且，我必须添加一个类＆＃34;类别＆＃34;所以我的每个问题都可以选择四个类别中的一个：世界，技术，屏幕和体育..例如，我的一个类别html我有screen.html我需要只显示基于类别＆＃39;屏幕和＃39 ;.这是我的screen.html。

{% extends 'polls/base.html' %}
{% block main_content %}
{% if latest_questions %}
<body>
    <ul style="list-style: none;">
        {% for question in latest_questions %}
        <li style="float:center">
            <div id="tabs"><a id="tabsword" href={% url 'polls:detail' question.id %}>
                <img id="tabsimage" align="middle" src='{{question.image.url}}'/>
                <p style=" font-size: 25px; font-family: Verdana; color: whitesmoke; text-align: center"><b>{{question.question_text}}</b></p>
            </a>
            </div>
        </li>
        {% endfor %}
    </ul>
{% else %}
    <p> You have no questions. Please add some.</p>
{% endif %}
{% endblock %}

帮助我修改代码，以便我可以添加班级类别，从四个类别中分配每个问题，并仅根据类别显示问题＆＃34;屏幕＆＃34;在上面的HTML。

Answer 1

如果您不想为类别创建另一个模型，一种简单的方法是执行以下操作（从Django documentation字段选项开始）：

from django.db import models

class Person(models.Model):
    SHIRT_SIZES = (
        ('S', 'Small'),
        ('M', 'Medium'),
        ('L', 'Large'),
    )
    name = models.CharField(max_length=60)
    shirt_size = models.CharField(max_length=1, choices=SHIRT_SIZES)

只需使用您想要的型号字段和选项替换衬衫尺码。

Answer 2

没有办法这样做。例如，在模型中定义选择

class Question(models.Model):
    CATEGORY_SIZES = (
        ('W', 'WORlD'),
        ('T', 'TECHNOLOGY'),
        ('S', 'SCREEN'),
    )
    question_text = models.CharField(max_length= 100)
    pub_date = models.DateTimeField('Date Is Published')
    image = models.ImageField(upload_to="Question_Image", blank=True)
    category = models.CharField(max_length=1, choices=CATEGORY_SIZES)

    def __str__(self):
        return self.question_text

在views.py

中

def your_view(request):
    questions = Question.objects.filter(category='S')
    context = {'questions': questions}
    return render(request, your_template ,context)

其他方式：如果您认为单独的模型将是您的更好选择

class Categories(models.Model):
    name = models.CharField(max_length= 100)

    def __str__(self):
        return self.name


class Question(models.Model):
    question_text = models.CharField(max_length= 100)
    pub_date = models.DateTimeField('Date Is Published')
    image = models.ImageField(upload_to="Question_Image", blank=True)
    category = models.ForeignKey(Categories)

    def __str__(self):
        return self.question_text

在views.py

中

def your_view(request):
    category = Category.objects.get(name='Screen')
    questions = category.question_set.all()
    context = {'questions': questions}
    return render(request, your_template,context)

如何在我的民意调查应用中添加类别？

2 个答案: