【发布时间】：2021-09-15 12:16:56
【问题描述】：
我有一个名为Package 的模型。它有名为diagnosis、treatment、patient_type、max_fractions 和total_package 的字段。字段diagnosis、treatment 和patient_type 具有在单独的单独类中定义的外键，使得diagnosis、treatment 和patient_type 选择字段。现在我想要的是在选择treatment 和patient_type 的值时自动填充max_fractions 和total_package 字段。有人建议我使用 JavaScript 来实现这一点。我尝试并编写了代码，但无济于事。我首先在max_fractions 字段上进行尝试，当我成功时，我会为所有需要的字段进行此操作。
谁能帮帮我，不胜感激。
这是我的模型：
class Diagnosis(models.Model):
diagnosis=models.CharField(max_length=30, blank=True)
def __str__(self):
return self.diagnosis
class Treatment(models.Model):
treatment=models.CharField(max_length=15, blank=True)
def __str__(self):
return self.treatment
class PatientType(models.Model):
patient_type=models.CharField(max_length=15, blank=True)
def __str__(self):
return self.patient_type
class Package(models.Model):
rt_number=ForeignKey(Patient, on_delete=CASCADE)
diagnosis=models.ForeignKey(Diagnosis, on_delete=CASCADE)
treatment=ForeignKey(Treatment, on_delete=CASCADE)
patient_type=ForeignKey(PatientType, on_delete=CASCADE)
max_fractions=models.IntegerField(default=None)
total_package=models.DecimalField(max_digits=10, decimal_places=2)
forms.py：
class DiagnosisForm(ModelForm):
class Meta:
model=Diagnosis
fields='__all__'
class TreatmentForm(ModelForm):
class Meta:
model=Treatment
fields='__all__'
class PatientTypeForm(ModelForm):
class Meta:
model=PatientType
fields='__all__'
class PackageForm(ModelForm):
class Meta:
model=Package
fields='__all__'
widgets={
"max_fractions" : forms.NumberInput(attrs={"onfocus":"mf();"}),
}
views.py：
def package_view(request):
if request.method=='POST':
fm_package=PackageForm(request.POST, prefix='package_form')
fm_diagnosis=DiagnosisForm(request.POST, prefix='diagnosis_form')
fm_treatment=TreatmentForm(request.POST, prefix='treatment_form')
fm_patient_type=PatientTypeForm(request.POST, prefix='patien_type_form')
if fm_package.is_valid() and fm_diagnosis.is_valid() and fm_treatment.is_valid() and fm_patient_type.is_valid():
diagnosis=fm_diagnosis.save()
treatment=fm_treatment.save()
patient_type=fm_patient_type.save()
package=fm_package.save(False)
package.diagnosis=diagnosis
package.treatment=treatment
package.patient_type=patient_type
package.save()
fm_package=PackageForm(prefix='package_form')
fm_diagnosis=DiagnosisForm(prefix='diagnosis_form')
fm_treatment=TreatmentForm(prefix='treatment_form')
fm_patient_type=PatientTypeForm(prefix='patien_type_form')
return render (request, 'account/package.html', {'form2':fm_diagnosis, 'form3':fm_treatment, 'form4':fm_patient_type, 'form5':fm_package})
else:
fm_package=PackageForm(prefix='package_form')
fm_diagnosis=DiagnosisForm(prefix='diagnosis_form')
fm_treatment=TreatmentForm(prefix='treatment_form')
fm_patient_type=PatientTypeForm(prefix='patien_type_form')
return render (request, 'account/package.html', {'form2':fm_diagnosis, 'form3':fm_treatment, 'form4':fm_patient_type, 'form5':fm_package})
JavaScript：
function mf(){
tt=document.getElementById("id_package_form-treatment").value;
ptt=document.getElementById("id_package_form-patient_type").value;
max=document.getElementById("id_package_form-max_fractions").value;
if (tt=="YEO5" && ptt=="RUHPE")
max=40;
else if (tt=="D4EG" && ptt=="KILEU")
max=40;
else if (tt=="5GED" && ptt=="IMRA")
max=40;
}
模板：
<!DOCTYPE html>
{% load static %}
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Package Form</title>
</head>
<body>
<form action="" method="post" novalidate>
{% csrf_token %}
{{form2.as_p}}
{{form3.as_p}}
{{form4.as_p}}
{{form5.as_p}}
<input type="submit" value="Submit">
</form>
<script src="{% static 'account/js/myjs.js' %}"></script>
</body>
</html>
网址：
path('package/', views.package_view),
现在，当我打开网页并单击查看页面源时，我看到选择字段的值显示为自动递增的数字。所以我的 JS 代码无法读取所需的选择值。
HTML 源页面视图：
<p><label for="id_package_form-treatment">Treatment:</label> <select name="package_form-treatment" required id="id_package_form-treatment">
<option value="" selected>---------</option>
<option value="1">YEO5</option>
<option value="2">2DRT</option>
<option value="3">D4EG</option>
<option value="4">5GED</option>
<option value="5"></option>
</select></p>
<p><label for="id_package_form-patient_type">Patient type:</label> <select name="package_form-patient_type" required id="id_package_form-patient_type">
<option value="" selected>---------</option>
<option value="1">RUHPE</option>
<option value="2">KILEU</option>
<option value="3">IMRA</option>
<option value="5"></option>
</select></p>
<p><label for="id_package_form-max_fractions">Max fractions:</label> <input type="number" name="package_form-max_fractions" onfocus="mf();" required id="id_package_form-max_fractions"></p>
我的代码出了什么问题，我找不到。这是我作为初学者最失望的经历。已经有 4 天了，我试图克服这一集。这里的很多人都试图帮助我提出有用的建议，我真的很感激，但我仍然被困在这里。有人请让我离开这里。我哪里错了？
【问题讨论】：
标签： javascript html django dom django-models