DocManagerBackend/docmanager_backend/documents/signals.py

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from django.db.models.signals import post_save
from django.dispatch import receiver
from config.settings import MEDIA_ROOT
import os
import fitz
import pytesseract
from PIL import Image
from .models import Document
@receiver(post_save, sender=Document)
def domain_post_save(sender, instance, **kwargs):
if not instance.ocr_metadata:
metadata = ""
with fitz.open(os.path.join(MEDIA_ROOT, instance.file.name)) as doc:
mat = fitz.Matrix(1.2, 1.2)
for page in doc:
pix = page.get_pixmap(matrix=mat)
output = f'{page.number}.jpg'
pix.save(output)
res = str(pytesseract.image_to_string(Image.open(output)))
os.remove(output)
metadata += res
instance.ocr_metadata = metadata
instance.save()