有没有用django-rest框架在发布请求中创建相关实体

Question

如果我听起来很困惑，那是因为我很困惑。我不熟悉django rest框架，我正在尝试创建一个相对简单的Recipe Management应用程序，该应用程序允许您自动创建购物清单。

动机：我知道可能不需要DRF，我可以使用django，但这个应用程序的重点是学习如何使用DRF。我们的目标是用DRF创造一个背部，然后用前部框架做一些花哨的恶作剧。

问题：我有一个Recipe模型，它包含Ingredient到RecipeIngredient的ManyToMany字段。我有点困惑于我应该如何处理RecipeSerializer。到目前为止，它看起来是这样的：

class RecipeSerializer(serializers.ModelSerializer):
class Meta:
model = Recipe
fields = ('id','name','ingredients','tags','prep_time','cook_time', 'servings', 'instructions')

但我觉得，每当我想创建一个Recipe时，我都必须发出一个post请求来创建Ingredients(如果它们还不存在的话(，一个请求创建Instructions，一个创建Recipe，一个生成RecipeIngredients。

问题：是否有方法提出一个包含配方和所有子字段(配料、配方、说明(的请求，并创建所有实体？这将由RecipeSerializer的create函数来处理。

型号：

class Tag(models.Model):
name = models.CharField(max_length=100, unique=True)
class Ingredient(models.Model):
name = models.CharField(max_length=100, unique=True)
class Recipe(models.Model):
name = models.CharField(max_length=100)
ingredients = models.ManyToManyField(Ingredient,through='RecipeIngredient')
tags = models.ManyToManyField(Tag, related_name='recipes')
prep_time = models.PositiveIntegerField()
cook_time = models.PositiveIntegerField()
servings = models.PositiveIntegerField()
class Instruction(models.Model):
number = models.PositiveIntegerField()
text = models.TextField()
recipe = models.ForeignKey(Recipe, related_name='instructions', on_delete = models.CASCADE)
class RecipeIngredient(models.Model):
ingredient = models.ForeignKey(Ingredient, on_delete = models.CASCADE)
recipe = models.ForeignKey(Recipe, on_delete = models.CASCADE)
quantity = models.PositiveIntegerField()
unit = models.CharField(max_length=30, null= False, blank=True)

序列化程序：

class TagSerializer(serializers.ModelSerializer):
recipes = serializers.PrimaryKeyRelatedField(queryset = Recipe.objects.all(), many = True)
class Meta:
model = Tag
fields = ('id','name', 'recipes')
class InstructionSerializer(serializers.ModelSerializer):
class Meta:
model = Instruction
fields = ('id','number','text','recipe')

class IngredientSerializer(serializers.ModelSerializer):
class Meta:
model = Ingredient
fields = ('id','name')
class RecipeIngredientSerializer(serializers.ModelSerializer):
class Meta:
model = RecipeIngredient
fields = ('id','ingredient','recipe','quantity','unit')

class RecipeSerializer(serializers.ModelSerializer):
class Meta:
model = Recipe
fields = ('id','name','ingredients','tags','prep_time','cook_time', 'servings', 'instructions')

Answer 1

您可以使用嵌套的序列化程序，您可以按以下更改RecipeSerializer

class IngredientSerializer(serializers.ModelSerializer):
class Meta:
model = Ingredient
fields = '__all__'

class RecipeSerializer(serializers.ModelSerializer):
ingredients = IngredientSerializer(many=True)
class Meta:
model = Recipe
fields = ('id','name','ingredients','tags','prep_time','cook_time', 'servings', 'instructions')