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serializers.py
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serializers.py
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from rest_framework import serializers
from posts.models import Post
from likes.models import Like
class PostSerializer(serializers.ModelSerializer):
owner = serializers.ReadOnlyField(source='owner.username')
is_owner = serializers.SerializerMethodField()
profile_id = serializers.ReadOnlyField(source='owner.profile.id')
profile_image = serializers.ReadOnlyField(source='owner.profile.image.url')
like_id = serializers.SerializerMethodField()
def validate_image(self, value):
if value.size > 2 * 1024 * 1024:
raise serializers.ValidationError('Image size larger than 2MB!')
if value.image.height > 4096:
raise serializers.ValidationError(
'Image height larger than 4096px!'
)
if value.image.width > 4096:
raise serializers.ValidationError(
'Image width larger than 4096px!'
)
return value
def get_is_owner(self, obj):
request = self.context['request']
return request.user == obj.owner
def get_like_id(self, obj):
user = self.context['request'].user
if user.is_authenticated:
like = Like.objects.filter(
owner=user, post=obj
).first()
return like.id if like else None
return None
class Meta:
model = Post
fields = [
'id', 'owner', 'is_owner', 'profile_id',
'profile_image', 'created_at', 'updated_at',
'title', 'content', 'image', 'image_filter',
'like_id',
]