关于python 3.x：如何从excel文件填充django manytomany数据库

How to populate a django manytomany database from excel file

我正在尝试将数据从Excel文件传输到我的sqlite3数据库中的许多表中。

型号.py

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from django.db import models

class Major(models.Model):
name = models.CharField(max_length=30, db_index=True)

class School(models.Model):
name = models.CharField(max_length=50, db_index=True)
majors = models.ManyToManyField(Major)

class professor(models.Model):
ProfessorIDS = models.IntegerField()
ProfessorName = models.CharField(max_length=100)
ProfessorRating = models.DecimalField(decimal_places=2,max_digits=4)
NumberofRatings = models.CharField(max_length=50)
#delete major from the model
school = models.ForeignKey(School , on_delete=models.CASCADE)
major = models.ForeignKey(Major , on_delete=models.CASCADE)

def __str__(self):
return self.ProfessorName

填充脚本

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# populate.py, school_major_link
import os
import django
from django_xlspopulator.populator import Populator
os.environ.setdefault('DJANGO_SETTINGS_MODULE','blog_project.settings')
django.setup()
from locate.models import Major

pop = Populator('C:/Users/David/Desktop/db_setup/School_Majors.xlsx', school_majors)
pop.populate()

号

尝试运行脚本时出现错误消息

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Traceback (most recent call last):
File"populate_school_major.py", line 9, in <module>
pop = Populator('C:/Users/David/Desktop/db_setup/School_Majors.xlsx', school_majors)
NameError: name 'school_majors' is not defined

但这是有意义的，因为这个脚本在models节中查找类名与表名的关系，所以我不太确定如何填充正确的表，请注意，我已经有了一个名为majors的表，该表已经使用这个脚本填充了，但是由于django通过变量vers和分开上课，我困了。

我尝试使用上面的填充脚本，但注意到这不起作用，因为它正在定位类，与数据库表的保存方式相反。(在sqlite3中，许多专业的表名称为school_majors)。

如果有人对如何填充数据库有任何建议，那就太好了。

数据库表名下面的图片。 enter image description here 。下面的Excel文件

氧化镁

相关讨论

正如Lukewarm所说，设置through允许我创建一个类，我可以用我的脚本引用这个类，严格来说，通过在model.py中定位一个类来填充它。

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from django.db import models

class Major(models.Model):
name = models.CharField(max_length=30, db_index=True)

class School(models.Model):
name = models.CharField(max_length=50, db_index=True)
school_Major_merge = models.ManyToManyField(Major, through='School_Major')

class School_Major(models.Model):
major = models.ForeignKey(Major, on_delete=models.CASCADE)
school = models.ForeignKey(School, on_delete=models.CASCADE)

class professor(models.Model):
ProfessorIDS = models.IntegerField()
ProfessorName = models.CharField(max_length=100)
ProfessorRating = models.DecimalField(decimal_places=2,max_digits=4)
NumberofRatings = models.CharField(max_length=50)
#delete major from the model
school = models.ForeignKey(School , on_delete=models.CASCADE)
major = models.ForeignKey(Major , on_delete=models.CASCADE)

def __str__(self):
return self.ProfessorName