HiPhone_BE/market/serializers.py

from rest_framework import serializers
from rest_framework.serializers import ModelSerializer

from market.models import (
    Brand,
    Product,
    Post,
    Image,
    ItemIssues,
)


class ProductSerializer(ModelSerializer):
    class Meta:
        model = Product
        fields = ("id", "name", "brand")
        depth = 1


class ProductListSerializer(ModelSerializer):
    class Meta:
        model = Product
        fields = ("id", "name")


class BrandSerializer(ModelSerializer):
    products = ProductListSerializer(many=True, read_only=True)

    class Meta:
        model = Brand
        fields = ["id", "name", "products"]


class BrandListSerializer(ModelSerializer):
    class Meta:
        model = Brand
        fields = "__all__"


class ImageSerializer(ModelSerializer):
    class Meta:
        model = Image
        fields = ("image",)


class ItemIssuesSerializer(ModelSerializer):
    class Meta:
        model = ItemIssues
        fields = (
            "display",
            "frame",
            "button",
            "biometric",
            "camera",
            "speaker",
            "others",
        )


class PostListSerializer(ModelSerializer):
    product = ProductListSerializer(read_only=True)
    nickname = serializers.CharField(source="author.nickname")
    image = serializers.SerializerMethodField()
    item_issues = ItemIssuesSerializer(read_only=True)

    class Meta:
        model = Post
        fields = (
            "id",
            "product",
            "price",
            "text",
            "nickname",
            "item_issues",
            "done",
            "written_at",
            "image",
        )

    def get_image(self, obj):
        first_image = obj.images.first()
        return ImageSerializer(
            instance=first_image,
            context=self.context,
        ).data["image"]


class PostCreateSerializer(ModelSerializer):
    item_issues = ItemIssuesSerializer(write_only=True)

    class Meta:
        model = Post
        fields = (
            "product",
            "price",
            "text",
            "item_issues",
        )


class PostUpdateSerializer(ModelSerializer):
    class Meta:
        model = Post
        fields = (
            "price",
            "text",
            "done",
        )


class PostSerializer(ModelSerializer):
    product = ProductListSerializer(read_only=True)
    nickname = serializers.CharField(source="author.nickname")
    images = ImageSerializer(many=True, read_only=True)
    item_issues = ItemIssuesSerializer(read_only=True)

    class Meta:
        model = Post
        fields = (
            "id",
            "product",
            "price",
            "text",
            "nickname",
            "item_issues",
            "done",
            "written_at",
            "images",
        )