old_contents: from django.db import models
  from django.contrib.auth.models import User
  
  class Job(models.Model):
      user = models.ManyToManyField(User)
      position = models.CharField(max_length=200, null=True, blank=True)
      url = models.URLField()
      job_id = models.IntegerField()
      organization = models.CharField(max_length=200, null=True, blank=True)
      school_name = models.TextField(null=True, blank=True)
      job_type = models.CharField(max_length=200, null=True, blank=True)
      salary = models.CharField(max_length=200, null=True, blank=True)
      is_external = models.CharField(max_length=200, null=True, blank=True)
      date_posted = models.DateField(null=True, blank=True)
      deadline = models.DateField(null=True, blank=True)
      description = models.TextField(null=True, blank=True)
      application_method = models.TextField(null=True, blank=True)
      grade_levels = models.CharField(max_length=400, null=True, blank=True)
      subject_areas = models.TextField(null=True, blank=True)
      employer_website = models.URLField(null=True, blank=True)
      local_contact = models.TextField(null=True, blank=True)
      community_description = models.TextField(null=True, blank=True)
  
new_contents: from django.db import models
  from django.contrib.auth.models import User
  
  class Job(models.Model):
      job_id = models.IntegerField(primary_key=True)
      user = models.ManyToManyField(User)
      position = models.CharField(max_length=200, null=True, blank=True)
      url = models.URLField()
      organization = models.CharField(max_length=200, null=True, blank=True)
      school_name = models.TextField(null=True, blank=True)
      job_type = models.CharField(max_length=200, null=True, blank=True)
      salary = models.CharField(max_length=200, null=True, blank=True)
      is_external = models.CharField(max_length=200, null=True, blank=True)
      date_posted = models.DateField(null=True, blank=True)
      deadline = models.DateField(null=True, blank=True)
      description = models.TextField(null=True, blank=True)
      application_method = models.TextField(null=True, blank=True)
      grade_levels = models.CharField(max_length=400, null=True, blank=True)
      subject_areas = models.TextField(null=True, blank=True)
      employer_website = models.URLField(null=True, blank=True)
      local_contact = models.TextField(null=True, blank=True)
      community_description = models.TextField(null=True, blank=True)
  
subject: use job_id as primary key