在Django的

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) 

一些麻煩與CreateView的我未來的算法：

1. 渲染BiochemicalAnalysisOfBloodForm用戶

2. 當他填寫的字段，並按下按鈕，「保存」創建一個新的實例的Analyzes()並以編程方式填充，並且當在後期方法中我調用super().post()時，那麼用戶數據將自動寫入模型BiochemicalAnalysisOfBlood？但我有一個錯誤：

NOT NULL constraint failed: laboratory_biochemicalanalysisofblood.analysis_id

我在手動模式如何可以添加到模型，創建初期的Analyzes()實例領域的「分析」？我不明白這個類來結束我在哪裏可以找到有關的所有信息，它的機會

Answer 1

你的算法的主要部分應該駐留在你的形式，因爲要在analysis_id傳遞到實例被保存

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

做超（）之前發佈，你可以修改request.POST數據，包括您的分析ID：

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

這可能會有所幫助。

另請注意，如果表單驗證在super（）。post中失敗，您仍然會創建一個可能沒有用的Analysis對象。你可以使用覆蓋CreateView的form_invalid方法來處理這個。