Question

我在models.py中定义了2个类：

class Job(models.Model):
    job_id = models.CharField(primary_key=True, max_length=10)
    job_title = models.CharField(max_length=35)
    min_salary = models.IntegerField(blank=True, null=True)
    max_salary = models.IntegerField(blank=True, null=True)
    class Meta:
        managed = False
        db_table = 'jobs'
    def __str__(self):
        return self.job_id

class Employee(models.Model):
    employee_id = models.IntegerField(primary_key=True)
    first_name = models.CharField(max_length=20, blank=True)
    last_name = models.CharField(max_length=25)
    email = models.CharField(unique=True, max_length=25)
    phone_number = models.CharField(max_length=20, blank=True)
    hire_date = models.DateField()
    job = models.ForeignKey('Job')
    salary = models.DecimalField(max_digits=8, decimal_places=2, blank=True, null=True)
    commission_pct = models.DecimalField(max_digits=2, decimal_places=2, blank=True, null=True)
    manager = models.ForeignKey('self', blank=True, null=True, related_name ='employee')
    department_id = models.IntegerField(blank=True, null=True)
    class Meta:
        managed = False
        db_table = 'employees'
        def __str__(self):
           return self.employee_id
        def __unicode__(self):
           return self.employee_id

问题在于外键，在Employees管理页面上，Job字段正确显示包含所有可能的job_id的下拉列表，但是manager字段显示下拉列表，所有条目都等于“Employee object”。我怀疑这是因为经理是self.employee的外键。

我该如何解决？

谢谢。

Answer 1

您在__str__课程中定义了__unicode__和Employee.Meta方法。

将它们缩进四个空格，你应该是好的：

class Employee(models.Model):
    employee_id = models.IntegerField(primary_key=True)
    first_name = models.CharField(max_length=20, blank=True)
    last_name = models.CharField(max_length=25)
    email = models.CharField(unique=True, max_length=25)
    phone_number = models.CharField(max_length=20, blank=True)
    hire_date = models.DateField()
    job = models.ForeignKey('Job')
    salary = models.DecimalField(max_digits=8, decimal_places=2, blank=True, null=True)
    commission_pct = models.DecimalField(max_digits=2, decimal_places=2, blank=True, null=True)
    manager = models.ForeignKey('self', blank=True, null=True, related_name ='employee')
    department_id = models.IntegerField(blank=True, null=True)
    class Meta:
        managed = False
        db_table = 'employees'

    def __str__(self):
       return self.employee_id
    def __unicode__(self):
       return self.employee_id

Answer 2

在__unicode__()模型中添加__str__()或Employee方法，就像在Job中一样。

class Employee(models.Model):
    def __unicode__(self):
        return self.email #or whatever string you want

此方法用于在django中将对象表示为字符串。

Django在外键列中显示对象引用

2 个答案: