带有Through参数的Django ForeignKey [英] Django ForeignKey with through parameter

问题描述

最初我的问题是如何使字段显示ModelForm中的Foreignkey. 我已经用这段代码解决了这个问题，但是我无法使它正常工作.

My problem originally was how to make fields show of a Foreignkey that is in ModelForm. I have solved this problem with this code but I can't get it to work.

以下模型构成了我的代码

The following models make my code

class DocAide(models.Model):
    id = models.AutoField(primary_key=True)
    pulse = models.DecimalField('Pulse', max_digits=3, decimal_places=0, blank=True, null=True)
    weight = models.DecimalField('Weight (kg)', max_digits=3, decimal_places=0, blank=True, null=True)
    bp_sys = models.DecimalField('BP Sys', max_digits=3, decimal_places=0, blank=True, null=True)
    bp_dia = models.DecimalField('BP Dia', max_digits=3, decimal_places=0, blank=True, null=True)
    temperature = models.DecimalField('Temp. deg C', max_digits=2, decimal_places=1, blank=True, null=True)
    scans = models.ManyToManyField(Scan, blank=True)
    tests = models.ManyToManyField(LabTest,  blank=True)
    date = models.DateField(editable=False, default=timezone.now)
    patient = models.ForeignKey(Patient, on_delete=models.CASCADE)
    created_by = models.ForeignKey(Doctor, on_delete=models.CASCADE, blank=True, null=True)
    no_charge = models.BooleanField('No Charge from Patient', default=False)
    doctors_notes = models.TextField('Patient is complaining about:', default='')
    part_to_scan = models.CharField(max_length=100, default='N/A', blank=True, null=True)
    part_to_xray = models.CharField(max_length=100, default='N/A', blank=True, null=True)
    note = models.TextField(max_length=100, default='')

和

class PrescriptionLine(models.Model):
    drug = models.ForeignKey(to=Drug, related_name='prescriptionlines', on_delete=models.CASCADE)
    doc_aide = models.ForeignKey(to=DocAide, related_name='prescriptionlines', on_delete=models.CASCADE)
    morning = models.CharField(validators=[int_list_validator], max_length=3, default=0)
    midday = models.CharField(validators=[int_list_validator], max_length=3, default=0)
    evening = models.CharField(validators=[int_list_validator], max_length=3, default=0)
    night = models.CharField(validators=[int_list_validator], max_length=3, default=0)
    days = models.CharField(validators=[int_list_validator], max_length=3, default=0)
    tablets = models.CharField(validators=[int_list_validator], max_length=3, default=0)

我的表单如下:

class DocAideForm(forms.ModelForm):

    class Media:
        css = {'all': ('/static/admin/css/widgets.css',), }
        js = ('/admin/jsi18n/',)

    class Meta:
        model = DocAide
        fields = [  # 'no_charge',
                  'doctors_notes', 'scans', 'part_to_xray', 'part_to_scan', 'tests', 'prescriptions']

没有处方就可以使用，但是我似乎无法从处方中访问数据.

Without the prescriptions it works but I can't seem to access the data from the Prescription.

那么，我该如何按照所需的处方字段创建表单.我想通过到"它连接到doc_aide_form.当我写这篇文章的时候，我只是有了另一个主意.我可以在doc_aide_form模板中创建一个用于处方的按钮，然后在其中创建一个完整的表单. 但是仍然如何更有效地使用此结构.

So how do I create the form the way I want of the prescriptions field. I thought through "to" it is connected to the doc_aide_form. Whilst I am writing this I just had another idea. I could create a button in the doc_aide_form template for prescription and make a whole form there. But still how do I use this structure more effectively.

谢谢

推荐答案

要创建带斜线的表单，必须使用官方网站上查看如何使用它的示例. django文档.

To create form with inlilines, you must use the inlineformset_factory. You can check an example of how to use it in the official django documentation.

models.py:

models.py:

from django.db import models

class Author(models.Model):
    name = models.CharField(max_length=100)

class Book(models.Model):
    author = models.ForeignKey(Author, on_delete=models.CASCADE)
    title = models.CharField(max_length=100)

views.py

from django.forms import inlineformset_factory
BookFormSet = inlineformset_factory(Author, Book, fields=('title',))
author = Author.objects.get(name='Mike Royko')
formset = BookFormSet(instance=author)

这篇关于带有Through参数的Django ForeignKey的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！