Django

Question

我有一个 Giftcard 模型和一个类别模型，其中包含每张卡的所有类别、费率和期限。它有一个返回 Giftcard 的外键。

我只想列出每张礼品卡的类别、费率和条款。由于代码是正确的，它显示所有礼品卡的相同类别、费率和条款。

型号

class Giftcard(models.Model):
name = models.CharField(max_length=100, unique=True)
card_image = models.ImageField(upload_to='Giftcard', blank=False)
date = models.DateTimeField(auto_now_add=True)
publish = models.BooleanField(default=False)



class Category(models.Model):
category = models.CharField(max_length=250)
name = models.ForeignKey(Giftcard, on_delete=models.CASCADE, related_name="specs")
rate = models.IntegerField()
terms = models.TextField()

这是我的看法

def giftcard(request):
giftcards = Giftcard.objects.filter(publish=True)

context = {
    'giftcards': giftcards,
}

return render(request, 'dashboard/giftcard.html', context)

这是我的模板

{% for giftcard in giftcards %}
          <!-- Card -->
          <div class="col-lg-4 gift__card col-6 p-0">
            <a type="button" class="btn">
              <img class="img-fluid gift__card-img" src="{{ giftcard.card_image.url }}">
            </a>

            <div class="container d-flex align-items-center  justify-content-center">
              <div class="gift__card-modal-container py-5">
                <div class="card__container">
                  <div class="gift__card-overlay"></div>
                  <div class="container-fluid bg-light  gift__card-modal shadow-lg">
                    <div class="pop p-5">
                      <div class="row d-flex align-items-center justify-content-between">
                        <div class="col-lg-5 col-12 p-0 m-0">
                          <img class="img-fluid" src="{{ giftcard.card_image.url }}">
                          <p class="text-muted">Select the card category and the amount.</p>
                        </div>

                        <div class="col-lg-6 col-sm-12 card-details">
                          <form class="card-form">
                            <div class="form-group py-2">
                              <label for="card-category">Card category</label>
                              <input list="category" class="form-control" name="category" id="card_category"
                                placeholder="Select card category">

                              {% for spec in giftcard.specs.all %}
                              <datalist id="category">
                                <option value="{{ spec.category }}">{{ spec.category }}</option>
                              </datalist>
                              {% endfor %}
                            </div>

                            <div class="form-group py-2">
                              <label for="Amount">Amount</label>
                              <div class="d-flex align-items-center amount">
                                <input type="text" class="form-control" id="amount"
                                  placeholder="Please enter amount">
                                <span class="">#100,000</span>
                              </div>
                            </div>

                            <div class="form-group py-3">
                              {% for spec in giftcard.specs.all %}
                              <label for="rate">Current rate - {{ spec.rate }}</label>
                              {% endfor %}
                            </div>

                            <div class="border-none pt-2 pl-3 d-flex justify-content-end">
                              <button type="button" class="btn  process-card-btn">Proceed</button>
                            </div>
                          </form>
                        </div>
                      </div>
                    </div>

                  </div>
                


                <div class="gift__terms-card hide fade" id="terms" tabindex="-1" role="dialog"
                  aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
                  <div class="modal-dialog modal-dialog-centered" role="document">
                    <div class="modal-content terms">
                      <div class="p-5">
                        <h4 class="terms-title pb-4">Trading terms</h4>
                        {% for spec in giftcard.specs.all %}
                        <p class="pb-2">
                          {{ spec.terms }}
                        </p>
                        {% endfor %}

                        <div class="border-none pt-3 pl-3 d-flex justify-content-end">
                          <button type="button" class="btn process-card-btn">Proceed</button>
                        </div>

                      </div>
                    </div>
                  </div>
                </div>
                </div>
              </div>
            </div>
          </div>
          {% endfor %}

Answer 1

从 django-doc 开始，您必须在主 Giftcard table 中创建 ForeginKey 字段，这将与 Category 建立 ManyToOne 关系table.

试试这个：

models.py

from django.db import models


class Category(models.Model):
    category = models.CharField(max_length=250)
    rate = models.IntegerField()
    terms = models.TextField()

    def __str__(self):
        return self.category


class Giftcard(models.Model):
    name = models.CharField(max_length=100, unique=True)
    card_image = models.ImageField(upload_to='Giftcard/', blank=False)
    date = models.DateTimeField(auto_now_add=True)
    publish = models.BooleanField(default=False)
    gift_category = models.ForeignKey(Category, on_delete=models.CASCADE)

views.py

def giftcard(request):
    giftcards = Giftcard.objects.filter(publish=True)

    context = {
        'giftcards': giftcards
    }
    return render(request, 'dashboard/giftcard.html', context)

现在，您可以在 template 文件的 Giftcard 项中访问 Category table 的所有属性，并且 giftcard 可以拥有更多比一个类别，它被称为ManyToOne关系，

Note: you can also use choices, which is much better than making table, you can see that too here in django-doc.

编辑

在 datalist

中执行此操作

<datalist id="category">
    {% for spec in giftcard.specs.all %}

        <option value="{{ spec.category }}">{{ spec.category }}</option>
    {% endfor %}

</datalist>

Answer 2

如果，正如您在其中一条评论中所说，“它不会那样工作，因为一张礼品卡可以有多个类别” 和 “不，Category 不能有超过一张 Giftcard”，那么你的 original 模型是正确的，ForeignKey 在 Category class 中。其次，我不知道到底发生了什么，也许添加你得到的错误的屏幕截图，因为我刚刚尝试了你的 original 代码，它有效，@Sunderam 建议对 datalist 进行修改。在您的 html 模板中对此进行测试：

{% for giftcard in giftcards %}
    {% for spec in giftcard.specs.all %}
        {{ spec.terms }}<br>
        {{ spec.category }}<br>
        {{ spec.rate }}<br>
    {% endfor %}
{% endfor %}

执行此操作时，我看到了不同的条款、类别和费率。再说一次，这不是你想要的吗？

编辑
您必须了解数据列表将具有所有和 spec 值，并且当您开始在输入框中键入时会显示一个。例如，如果您键入 c，则列表将弹出所有个以 c.

开头的类别

编辑
确保数据列表已更改为

<div class="form-group py-2">
  <label for="card-category">Card category</label>
  <input list="category" class="form-control" name="category" id="card_category"
    placeholder="Select card category">

  {% for spec in giftcard.specs.all %}
  <datalist id="category">
    <option value="{{ spec.category }}">{{ spec.category }}</option>
  </datalist>
  {% endfor %}
</div>

毕竟你只想要一个 <datalist>个元素，然后很多 <option>个。

Django - 显示属于每张卡片的类别列表

Django - Display list of category belonging to each card

python

django-templates

django-models

django-views

编辑