Method save

apps/knowledge/models/knowledge.py:385–404

(self, bytea=None, force_insert=False, force_update=False, using=None, update_fields=None)

        db_table = "file"

    def save(self, bytea=None, force_insert=False, force_update=False, using=None, update_fields=None):
        if bytea is None:
            raise ValueError("bytea参数不能为空")

        sha256_hash = get_sha256_hash(bytea)
        self.sha256_hash = sha256_hash
        existing_file = QuerySet(File).filter(sha256_hash=sha256_hash).first()
        if existing_file:
            self.loid = existing_file.loid
            self.file_size = existing_file.file_size
            return super().save()

        compressed_data = self._compress_data(bytea)
        self.file_size = len(compressed_data)

        self.loid = self._create_large_object()

        self._write_compressed_data(compressed_data)
        # 调用父类保存
        return super().save()

    def _compress_data(self, data, compression_level=9):
        """压缩数据到内存"""