建立模型关系时相关字段的查找无效

问题描述

我正在尝试建立遍历不同模型的关系，但出现此错误：

django.core.exceptions.FieldError: Related Field got invalid lookup: occupational_group

以下是我拥有的模型：

class LoanApplication(models.Model,TimeStampedModel):
    loan_taker = models.ForeignKey(
        CustomerProfile,on_delete=models.PROTECT,null=True,blank=True,verbose_name=_('Customer Profile'),related_name='loan_entries')


class CustomerProfile(models.Model,TimeStampedModel):

    is_copy_component = models.BooleanField(
        _('Is copy component'),default=False)
    cooperation_partner = models.ForeignKey(
        EmailUser,verbose_name=_('Jurisdiction'),related_name='partner_user_profile')
    user = models.OneToOneField(
        EmailUser,verbose_name=_('User'),related_name='user_profile')
    approval_inquiry_sent_at = models.DateTimeField(
        _('Approval inquiry sent at'),blank=True)
    email_content_customer = models.FileField(
        _('Content of the customer email'),upload_to="customer-emails/",blank=True)
    approved_at = models.DateTimeField(
        _('Approved at'),blank=True)



class CustomerProfilePerson(models.Model,TimeStampedModel):


    person = models.ForeignKey(
        Person,on_delete=models.CASCADE,verbose_name=_('Person'),related_name='customer_profile_relation')
    customer_profile = models.ForeignKey(
        CustomerProfile,related_name='persons')


class Person(models.Model,TimeStampedModel):

    occupational_group = models.CharField(
        _('Occupational group'),max_length=16,choices=OCCUPATIONAL_GROUP_CHOICES)

我正在尝试过滤具有 LoanApplication 关系的 occupation group 模型，以下是职业组列表：

OCCUPATIONAL_GROUP_CHOICES = (
    ('pharmacist',_('Pharmacist')),('architect',_('Architect')),('doctor',_('Doctor')),('consulting_eng',_('Consulting engineer')),('notary',_('Notary')),('psychotherapist',_('Psychotherapist')),('lawyer',_('Lawyer')),('tax_consultant',_('Tax Consultant')),('vet',_('Vet')),('sworn_auditor',_('Sworn auditor')),('surveyor',_('Surveyor')),('auditor',_('Auditor')),('dentist',_('Dentist')),('other',_('Other')),)

所以这是我下面的查询但失败了：

LoanApplication.objects.filter(loan_taker__persons__person__occupational_group__in: ['pharmacist'])

我收到此异常：

django.core.exceptions.FieldError: Related Field got invalid lookup: occupational_group

解决方法

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