1つのappで似たmodelを複数作成する

前提・実現したいこと

同じappの中で１つのmodelを作成して似た内容のmodelを複数作成する方法はありませんか？

発生している問題・エラーメッセージ

具体的にはこちらに記載した、
classと2行目、class Meta以外は同じ内容を繰り返して、別のmodelを作成しています。
内容の変更を行う際に全部で12個のmodelを一つずつ直しているのですが、
時間がかかるので何とかしたく。
わかる方ご教授ください。


class InsLedger1(models.Model):
    measuring_ins_group = models.IntegerField(choices=MEASURING_INS_GROUP_CHOICES,default=1)
----------------------------------------------
    class Meta:
        verbose_name = "マイクロメータ"

該当のソースコード

python
1models.py
2
3class InsLedger1(models.Model):
4    measuring_ins_group = models.IntegerField(choices=MEASURING_INS_GROUP_CHOICES,default=1)
5    measuring_tool = models.ForeignKey(Device, on_delete=models.CASCADE)
6    ins_num = models.CharField(max_length=10)
7    calibration_type = models.IntegerField(choices=CALIBRATION_CHOICES)#校正期間
8    calibration_date = models.DateTimeField(default=now)#datetime.datetime.now())
9    next_calibration_date = models.DateTimeField()
10    serial_num = models.CharField(max_length=20, null=True, blank=True, default='')
11    product_num = models.ForeignKey(Product_num, on_delete=models.CASCADE)#対象品番
12    team = models.ForeignKey(TeamModel, on_delete=models.CASCADE)
13    line = models.ForeignKey(LineModel, on_delete=models.CASCADE)
14    useapp = models.ForeignKey(Useapp, on_delete=models.CASCADE)#使用用途
15    spec1 = models.ForeignKey(Spec1, on_delete=models.CASCADE)#最小目盛
16    spec2 = models.ForeignKey(Spec2, on_delete=models.CASCADE)#測定範囲
17    spec3 = models.IntegerField(choices=SPEC3_CHOICES)#表示
18    item = models.ForeignKey(Item, on_delete=models.CASCADE)#日常点検項目
19
20    def save(self, *args, **kwargs):
21        auto_now = kwargs.pop('next_calibration_date_auto_now', True)
22        if auto_now:
23            if self.calibration_type == CALIBRATION_CHOICES[0]:
24                calibration_span = 1
25            elif self.calibration_type == CALIBRATION_CHOICES[1]:
26                calibration_span = 2
27            elif self.calibration_type == CALIBRATION_CHOICES[2]:
28                calibration_span = 5
29            elif self.calibration_type == CALIBRATION_CHOICES[3]:
30                calibration_span = 10
31            self.next_calibration_date = self.calibration_date + relativedelta(years=calibration_span)
32            super().save(*args, **kwargs)
33
34    def __str__(self):
35        return str(self.measuring_tool)
36
37    class Meta:
38        verbose_name = "マイクロメータ"
39
40
41class InsLedger2(models.Model):
42    measuring_ins_group = models.IntegerField(choices=MEASURING_INS_GROUP_CHOICES,default=2)
43    measuring_tool = models.ForeignKey(Device, on_delete=models.CASCADE)
44    ins_num = models.CharField(max_length=10)
45    calibration_type = models.IntegerField(choices=CALIBRATION_CHOICES)#校正期間
46    calibration_date = models.DateTimeField(default=now)#datetime.datetime.now())
47    next_calibration_date = models.DateTimeField()
48    serial_num = models.CharField(max_length=20, null=True, blank=True, default='')
49    product_num = models.ForeignKey(Product_num, on_delete=models.CASCADE)#対象品番
50    team = models.ForeignKey(TeamModel, on_delete=models.CASCADE)
51    line = models.ForeignKey(LineModel, on_delete=models.CASCADE)
52    useapp = models.ForeignKey(Useapp, on_delete=models.CASCADE)#使用用途
53    spec1 = models.ForeignKey(Spec1, on_delete=models.CASCADE)#最小目盛
54    spec2 = models.ForeignKey(Spec2, on_delete=models.CASCADE)#測定範囲
55    spec3 = models.IntegerField(choices=SPEC3_CHOICES)#表示
56    item = models.ForeignKey(Item, on_delete=models.CASCADE)#日常点検項目
57
58    def save(self, *args, **kwargs):
59        auto_now = kwargs.pop('next_calibration_date_auto_now', True)
60        if auto_now:
61            if self.calibration_type == CALIBRATION_CHOICES[0]:
62                calibration_span = 1
63            elif self.calibration_type == CALIBRATION_CHOICES[1]:
64                calibration_span = 2
65            elif self.calibration_type == CALIBRATION_CHOICES[2]:
66                calibration_span = 5
67            elif self.calibration_type == CALIBRATION_CHOICES[3]:
68                calibration_span = 10
69            self.next_calibration_date = self.calibration_date + relativedelta(years=calibration_span)
70            super().save(*args, **kwargs)
71
72    def __str__(self):
73        return str(self.measuring_tool)
74
75    class Meta:
76        verbose_name = "ノギス"