Django模板中的显示关系属性

Question

因此，在我的模型中，我有：

class Ingredient(models.Model):
    name = models.CharField(max_length=200)
    articleNumber = models.IntegerField(unique=True)
    costPerUnity = models.DecimalField(max_digits=4, decimal_places=2)

class Recipe(models.Model):
    name = models.CharField(max_length=200)
    ingredients = models.ManyToManyField(Ingredient, through='Recipe_Ingredient', related_name='recipes')

class Recipe_Ingredient(models.Model):
    recipe = models.ForeignKey(Recipe, on_delete=models.CASCADE)
    ingredient = models.ForeignKey(Ingredient, on_delete=models.CASCADE)
    quantity = models.FloatField()

    GRAM = 'g'
    KILOGRAM = 'kg'
    LITER = 'l'
    CENTILITER = 'cl'

    UNITY_CHOICES = (
        (GRAM, 'Gram(s)'),
        (KILOGRAM, 'Kilogram(s)'),
        (LITER, 'Liter(s)'),
        (CENTILITER, 'Centiliter(s)'),
    )

    quantityUnit = models.CharField(
        max_length=2,
        choices=UNITY_CHOICES,
        default=GRAM,
    )

在我的模板中：

{% for ingredient in recipe.ingredients.all %}
    <li>{{ ingredient.name }} -  # quantity goes here </li>
{% endfor %}

如何显示与此配方和成分关联的Recipe_Ingredient的数量属性？ 在外壳中，我可以执行以下查询：Recipe_Ingredient.objects.get（ingredient = Ingredient.objects.get（name ='Cenoura'），recipe = Recipe.objects.get（name ='Teste'）），但是我不太确定如何在模板中执行此操作以及执行此操作的正确方法是什么。

Answer 1

您可以通过遍历Receipe_Ingredient关系来完成Receipe_Ingredient 。

{% for recipe_ingredient in recipe.recipe_ingredient_set.all %}
    <li>{{ recipe_ingredient.ingredient.name }} -  {{ recipe_ingredient.quantity }} </li>
{% endfor %}