from django.db import models
from apps.utils.models import BaseModel, CommonBModel
from apps.mtm.models import Material
# Create your models here.

class WareHouse(CommonBModel):
    """
    仓库信息
    """
    number = models.CharField('仓库编号', max_length=20)
    name = models.CharField('仓库名称', max_length=20)
    place = models.CharField('具体地点', max_length=50)


class MaterialBatch(BaseModel):
    """
    物料批次
    """
    batch = models.CharField('批次号', max_length=100)
    material = models.ForeignKey(
        Material, on_delete=models.CASCADE, verbose_name='物料')
    warehouse = models.ForeignKey(
        WareHouse, on_delete=models.CASCADE, verbose_name='所在仓库')
    count = models.PositiveIntegerField('存量', default=0)
    expiration_date = models.DateField('有效期', null=True, blank=True)