Question

class Biochemical_analysis_of_blood(CreateView):
    model = BiochemicalAnalysisOfBlood
    form_class = BiochemicalAnalysisOfBloodForm
    template_name = "biochemical_analysis_of_blood.html"
    success_url = reverse_lazy("patients")

    def get_context_data(self, **kwargs):
        context = super(Biochemical_analysis_of_blood, self).get_context_data(**kwargs)
        patient = Patient.objects.get(id=1)
        context["patient"] = patient
        return context

    def post(self, request, *args, **kwargs):
        analysis = Analyzes()
        sid = transaction.savepoint()
        analysis.name = request.POST["name"]
        analysis.patient_id = Patient.objects.get(id=1)
        analysis.who_send = request.POST["who_send"]
        analysis.who_is_doctor = request.POST["who_is_doctor"]
        analysis.lab_user_id = Doctor.objects.get(id=request.POST["lab_user_id"])
        analysis.additional_lab_user = request.POST["lab_user_add"]
        analysis.date = '2017-06-18'
        analysis.type = 3
        analysis.date_analysis = '2017-06-18'
        analysis.save()
        return super(Biochemical_analysis_of_blood, self).post(request, *args, **kwargs)

我有下一个算法：

向用户呈现BiochemicalAnalysisOfBloodForm
当他填写字段并按下按钮“保存”时，我创建一个Analyzes()的新实例并以编程方式填充它，当我在post方法中调用super().post()时，将写入用户数据自动到模型BiochemicalAnalysisOfBlood？但我有下一个错误：

NOT NULL约束失败： laboratory_biochemicalanalysisofblood.analysis_id

我如何手动模式将模型添加到“分析”早期创建的Analyzes()实例的字段中？我不明白这个课程到底能找到所有机会的信息

Answer 1

算法的主要部分应该位于表单中，因为您要将analysis_id传递给正在保存的实例

class BiochemicalAnalysisOfBloodForm(ModelForm):
    def save(self, commit=True):
        analysis = Analyzes()
        sid = transaction.savepoint()
        analysis.name = self.data["name"]
        analysis.patient_id = Patient.objects.get(id=1)
        analysis.who_send = self.data["who_send"]
        analysis.who_is_doctor = self.data["who_is_doctor"]
        analysis.lab_user_id = Doctor.objects.get(id=self.data["lab_user_id"])
        analysis.additional_lab_user = self.data["lab_user_add"]
        analysis.date = '2017-06-18'
        analysis.type = 3
        analysis.date_analysis = '2017-06-18'
        analysis.save()
        # Your analysis is created, attach it to the form instance object
        self.instance.analysis_id = analysis.id
        return super().save(commit)

Answer 2

在执行super（）。post之前，您可以修改request.POST数据以包含您的分析ID：

request.POST['analysis_id'] = analysis.id

这可能会有所帮助。

另请注意，如果表单验证在super（）。post中失败，您仍然会创建一个可能没用的Analysis对象。您可以使用覆盖CreateView的form_invalid方法来处理此问题。

Django中的CreateView有些麻烦

2 个答案: