我被要求设计一种方式让人们根据他们输入的标准搜索多个模型，并允许他们导出他们选择的任意数量的字段。
实施例： 用户输入“教师”作为职务名称和“Google”作为工作地点位置，但要输出“员工ID”，“名字”，“姓氏”，“出生日期”
我确信这是可能的，但我完全不知道从哪里开始。
我的模型（供参考）在这里：
import datetime
from django.conf import settings
from django.db import models
from django.db.models import Q
from django.utils import timezone
class Classification(models.Model):
name = models.CharField(max_length=255, blank=False, null=False, verbose_name='Classification Name')
def __str__(self):
return '{}'.format(self.name)
class Meta:
db_table = 'Classification'
verbose_name = 'Classification'
verbose_name_plural = 'Classifications'
class Location(models.Model):
name = models.CharField(max_length=255, blank=False, null=False, verbose_name='Name')
aeries_id = models.CharField(max_length=25, blank=True, null=True, verbose_name='Aeries ID')
county_id = models.CharField(max_length=25, blank=True, null=True, verbose_name='County ID')
def __str__(self):
return '{}'.format(self.name)
class Meta:
db_table = 'Location'
verbose_name = 'Location'
verbose_name_plural = 'Locations'
ordering = ['name']
class Person(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.SET_NULL, blank=True, null=True)
current_identity = models.ForeignKey('PersonIdentity', blank=True, null=True, on_delete=models.SET_NULL, verbose_name='Current Identity', related_name='current_identity')
employee_id = models.CharField(max_length=255, null=False, blank=False, verbose_name='Employee ID')
birthdate = models.DateField(blank=True, null=True, verbose_name='Birthdate')
original_hire_date = models.DateField(blank=True, null=True, verbose_name='Original Hire Date')
def __str__(self):
if self.current_identity is not None:
return '{}'.format(str(self.current_identity))
else:
return "{}".format(self.employee_id)
@property
def current_age(self):
from dateutil.relativedelta import relativedelta
difference_in_years = relativedelta(timezone.now().date(), self.birthdate).years
return difference_in_years
def primary_assignment(self):
return self.jobassignment_set.filter(Q(end_date__gte=timezone.now()) | Q(end_date=None)).order_by('priority')[0]
@property
def display_name(self):
if self.current_identity:
return '{0.first_name} {0.last_name} ({1.employee_id})'.format(self.current_identity, self)
else:
return 'Employee ID {0.employee_id}'.format(self)
@property
def is_certificated(self):
assignments = JobAssignment.objects.filter(Q(end_date__gte=timezone.now()) | Q(end_date=None)).filter(
person=self,
classification__name__icontains="Certificated"
)
return assignments.count() >= 1
class Meta:
db_table = 'Person'
verbose_name = 'Person'
verbose_name_plural = 'People'
class PersonIdentity(models.Model):
person = models.ForeignKey(Person, verbose_name='Person', on_delete=models.CASCADE)
first_name = models.CharField(max_length=50, blank=True, null=True, verbose_name='First Name')
middle_name = models.CharField(max_length=50, blank=True, null=True, verbose_name='Middle Name')
last_name = models.CharField(max_length=50, blank=True, null=True, verbose_name='Last Name')
start_date = models.DateField(blank=False, null=False, default=datetime.date.today, verbose_name='Start Date')
end_date = models.DateField(blank=True, null=True, verbose_name='End Date')
def __str__(self):
first_name = '' if self.first_name is None else self.first_name
last_name = '' if self.last_name is None else self.last_name
if self.middle_name is not None and self.middle_name != '':
return "{} {}. {} ({})".format(first_name, self.middle_name[0], last_name, self.person.employee_id)
else:
return "{} {} ({})".format(first_name, last_name, self.person.employee_id)
def save(self, *args, **kwargs):
change_identity = False
if not self.id:
change_identity = True
super().save(*args, **kwargs)
if change_identity:
self.person.current_identity = self
self.person.save()
class Meta:
db_table = 'PersonIdentity'
verbose_name = 'Person Identity'
verbose_name_plural = 'Person Identities'
ordering = ['end_date', 'last_name', 'first_name']
class Contact(models.Model):
person = models.OneToOneField(Person, on_delete=models.CASCADE, verbose_name='Person')
email_address = models.EmailField(blank=True, null=True, verbose_name='Primary Email')
phone_number = models.CharField(max_length=15, blank=True, null=True, verbose_name='Phone Number')
phone_extension = models.CharField(max_length=255, blank=True, null=True, verbose_name='Phone Extension')
address1 = models.CharField(max_length=255, blank=True, null=True, verbose_name='Address 1')
address2 = models.CharField(max_length=255, blank=True, null=True, verbose_name='Address 2')
city = models.CharField(max_length=255, blank=True, null=True, verbose_name='City')
state = models.CharField(max_length=2, default='CA', blank=True, null=True, verbose_name='State')
postal = models.CharField(max_length=5, blank=True, null=True, verbose_name='Postal Code')
def __str__(self):
return '{}'.format(self.person.current_identity)
class Meta:
db_table = 'Contact'
verbose_name = 'Contact'
verbose_name_plural = 'Contacts'
class Department(models.Model):
department_id = models.CharField(max_length=5, blank=False, null=False, verbose_name='Department ID')
description = models.CharField(max_length=255, blank=False, null=False, verbose_name='Department Description')
def __str__(self):
return '{}'.format(self.description)
class Meta:
db_table = 'Department'
verbose_name = 'Department'
verbose_name_plural = 'Departments'
class Job(models.Model):
name = models.CharField(max_length=255, blank=False, null=False, verbose_name='Name')
code = models.CharField(max_length=255, blank=False, null=False, verbose_name='Code')
def __str__(self):
return '{}'.format(self.name)
class Meta:
db_table = 'Job'
verbose_name = 'Job'
verbose_name_plural = 'Jobs'
class JobPosition(models.Model):
job = models.ForeignKey(Job, blank=True, null=True, verbose_name='Job')
reports_to = models.ForeignKey('JobPosition', blank=True, null=True, verbose_name='Reports To')
name = models.CharField(max_length=255, blank=True, null=True, verbose_name='Name')
number = models.CharField(max_length=255, blank=False, null=False, verbose_name='Number')
def __str__(self):
return '{}'.format(self.name)
class Meta:
db_table = 'JobPosition'
verbose_name = 'Job Position'
verbose_name_plural = 'Job Positions'
class JobAssignment(models.Model):
person = models.ForeignKey(Person, blank=False, null=False, verbose_name='Person')
position = models.ForeignKey(JobPosition, blank=False, null=False, verbose_name='Position')
location = models.ForeignKey(Location, blank=True, null=True, verbose_name='School')
classification = models.ForeignKey(Classification, blank=True, null=True, verbose_name='Classification')
start_date = models.DateField(blank=True, null=True, verbose_name='Start Date')
end_date = models.DateField(blank=True, null=True, verbose_name='End Date')
effective_date = models.DateField(blank=True, null=True, verbose_name='Effective Date')
fte = models.CharField(max_length=10, blank=True, null=True, verbose_name='FTE')
seniority_date = models.DateField(blank=True, null=True, verbose_name='Seniority Date')
last_start_date = models.DateField(blank=True, null=True, verbose_name='Last Start Date')
last_pay_date = models.DateField(blank=True, null=True, verbose_name='Last Pay Date')
entry_date = models.DateField(blank=True, null=True, verbose_name='Position Entry Date')
record_number = models.IntegerField(default=0, verbose_name='Position Record Number')
pay_group = models.CharField(max_length=3, blank=True, null=True, verbose_name='Pay Group')
indicator = models.CharField(max_length=1, blank=True, null=True, verbose_name='Indicator')
full_or_part_time = models.CharField(max_length=1, blank=True, null=True, verbose_name='Full/Part')
standard_hours_per_week = models.DecimalField(max_digits=5, decimal_places=2, blank=True, null=True, verbose_name='Standard Hours per Week')
pay_status = models.CharField(max_length=1, blank=True, null=True, verbose_name='Pay Status')
comp_rate = models.DecimalField(max_digits=15, decimal_places=6, blank=True, null=True, verbose_name='Comp Rate')
comp_frequency = models.CharField(max_length=10, blank=True, null=True, verbose_name='Comp Freq')
hourly_rate = models.DecimalField(max_digits=10, decimal_places=6, blank=True, null=True, verbose_name='Hrly Rate')
daily_rate = models.DecimalField(max_digits=10, decimal_places=6, blank=True, null=True, verbose_name='Daily Rt')
rate_code = models.CharField(max_length=10, blank=True, null=True, verbose_name='Rate Code')
compensation_rate = models.DecimalField(max_digits=15, decimal_places=6, blank=True, null=True, verbose_name='Compensation Rate')
total_cdays = models.DecimalField(max_digits=5, decimal_places=2, blank=True, null=True, verbose_name='TOTAL_CDAYS')
teacher_hours = models.DecimalField(max_digits=4, decimal_places=2, blank=True, null=True, verbose_name='Teacher Hours')
def __str__(self):
return '{} - {}'.format(self.position.name, self.position.number)
@classmethod
def current_assignments(cls):
return cls.objects.filter(Q(end_date__gte=timezone.now()) | Q(end_date=None)).exclude(person__ssn__isnull=True).exclude(person__current_identity__isnull=True).exclude(person__contact__isnull=True)
class Meta:
db_table = 'JobAssignment'
verbose_name = 'Job Assignment'
verbose_name_plural = 'Job Assignments'
ordering = ['location__name', 'person__current_identity__last_name', 'person__current_identity__first_name', 'position__name']