ভ্যালিডেশন

class PostSerializer(serializers.Serializer):
    id = serializers.IntegerField(read_only=True)
    title = serializers.CharField(max_length=255)
    content = serializers.CharField()
    active = serializers.BooleanField(default=False)

    def validate_title (self, value):
        """
        Check that the name is not empty.
        """
        if not value:
            raise serializers.ValidationError("Name is required")
        return value

    def validate_content (self, value):
        """
        Check that the description is at least 10 characters long.
        """
        if len(value) < 10:
            raise serializers.ValidationError("content must be at least 10 characters long")
        return value

class PostSerializer(serializers.Serializer):
    id = serializers.IntegerField(read_only=True)
    title = serializers.CharField(max_length=255)
    content = serializers.CharField()
    active = serializers.BooleanField(default=False)
    
    def validate(self, data):
        """
        Check that the name and content fields are equal.
        """
        if data['title'] == data['content']:
            raise serializers.ValidationError("title and content must not be equal")
        return data

def multiple_of_ten(value):
    if value % 10 != 0:
        raise serializers.ValidationError('Not a multiple of ten')
    return value

class PostSerializer(serializers.Serializer):
    id = serializers.IntegerField(read_only=True)
    title = serializers.CharField(max_length=255)
    content = serializers.CharField()
    active = serializers.BooleanField(default=False)
    score = serializers.IntegerField(validators=[multiple_of_ten])

serializers.DecimalField(max_digits=5, decimal_places=2)

from rest_framework import serializers
from .models import Post



class PostSerializer(serializers.ModelSerializer):

    class Meta:
        model= Post
        fields = "__all__"
        
        
        
    def validate_title (self, value):
        """
        Check that the title is not empty.
        """
        if not value:
            raise serializers.ValidationError("title is required")
        return value

    def validate_content (self, value):
        """
        Check that the content is at least 10 characters long.
        """
        if len(value) < 10:
            raise serializers.ValidationError("content must be at least 10 characters long")
        return value

    def validate(self, data):
        """
        Check that the name and content fields are equal.
        """
        if data['title'] == data['content']:
            raise serializers.ValidationError("title and content must not be equal")
        return data