| """发票模型。""" |
|
|
| from __future__ import annotations |
|
|
| from typing import ClassVar |
|
|
| from django.db import models |
| from django.utils.translation import gettext_lazy as _ |
|
|
| from .payment import ContractPayment |
|
|
|
|
| class Invoice(models.Model): |
| """与某条 ContractPayment 关联的发票文件。""" |
|
|
| id: int |
| payment_id: int |
| payment = models.ForeignKey( |
| ContractPayment, |
| on_delete=models.CASCADE, |
| related_name="invoices", |
| verbose_name=_("收款记录"), |
| ) |
| file_path = models.CharField(max_length=500, verbose_name=_("文件路径")) |
| original_filename = models.CharField(max_length=255, verbose_name=_("原始文件名")) |
| remark = models.TextField(blank=True, default="", verbose_name=_("备注")) |
| uploaded_at = models.DateTimeField(auto_now_add=True, verbose_name=_("上传时间")) |
|
|
| |
| invoice_code = models.CharField(max_length=20, blank=True, default="", verbose_name=_("发票代码")) |
| invoice_number = models.CharField(max_length=20, blank=True, default="", verbose_name=_("发票号码")) |
| invoice_date = models.DateField(null=True, blank=True, verbose_name=_("开票日期")) |
| amount = models.DecimalField( |
| max_digits=14, |
| decimal_places=2, |
| null=True, |
| blank=True, |
| verbose_name=_("金额"), |
| ) |
| tax_amount = models.DecimalField( |
| max_digits=14, |
| decimal_places=2, |
| null=True, |
| blank=True, |
| verbose_name=_("税额"), |
| ) |
| total_amount = models.DecimalField( |
| max_digits=14, |
| decimal_places=2, |
| null=True, |
| blank=True, |
| verbose_name=_("价税合计"), |
| ) |
|
|
| class Meta: |
| ordering: ClassVar = ["-uploaded_at"] |
| verbose_name = _("发票") |
| verbose_name_plural = _("发票") |
| indexes: ClassVar = [ |
| models.Index(fields=["payment", "-uploaded_at"]), |
| ] |
|
|
| def __str__(self) -> str: |
| return self.original_filename or f"发票 #{self.id}" |
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|
