Django

Question

我看过这个 (django variable of one view to another from session)，但我认为预期的结果完全不同。

我的 views.py 文件中有两个视图：projectcreation 和 projectconfirm。用户在项目创建视图中填写表格后，我希望他们在继续项目创建之前被定向到一个确认页面，该页面提供变量的只读视图。

我的 views.py 文件如下所示：

from django.shortcuts import render
from django.http import HttpResponse
from .projectform import ProjectForm
from .projectconfirm import ProjectConfirm

def projectcreation(request):
    if request.method == 'POST':
        form = ProjectForm(request.POST)
        if form.is_valid():
            request.session['projectname'] = form.cleaned_data['client'] + "-" + form.cleaned_data['stage'] + "-" + form.cleaned_data['purpose']
            request.session['computeapi'] = form.cleaned_data['computeapi']
            request.session['deploymentmanapi'] = form.cleaned_data['deploymentmanapi']
            request.session['storagecompapi'] = form.cleaned_data['storagecompapi']
            request.session['monitorapi'] = form.cleaned_data['monitorapi']
            request.session['loggingapi'] = form.cleaned_data['loggingapi']
            return render(request,'projectconfirm.html')
    else:
        form = ProjectForm()
    return render(request, 'projectform.html', {'form': form})

def projectconfirm(request):
    if request.method =='POST':
        print("Now beginning deployment...")
    else:
        form = ProjectConfirm()
    return render(request, 'projectconfirm.html', {'form': form})

我面临的问题是如何在 projectconfirm.py 脚本中加载会话变量，但我承认我并不理解。我认为像下面这样的东西会起作用，但它抱怨 'request' 是一个未定义的变量：

from django import forms
from django.shortcuts import render
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Layout, Submit, Row, Column, Field, Fieldset

class ProjectConfirm(forms.Form):
    name = forms.CharField(widget=forms.TextInput(attrs={'placeholder': request.session['projectname']}))
    computeapi = forms.CharField(widget=forms.TextInput(attrs={'placeholder': request.session['computeapi']}))
    deploymentmanapi = forms.CharField(widget=forms.TextInput(attrs={'placeholder': request.session['deploymentmanapi']}))
    storagecompapi = forms.CharField(widget=forms.TextInput(attrs={'placeholder': request.session['storagecompapi']}))
    monitorapi = forms.CharField(widget=forms.TextInput(attrs={'placeholder': request.session['monitorapi']}))
    loggingapi = forms.CharField(widget=forms.TextInput(attrs={'placeholder': request.session['loggingapi']}))

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.layout = Layout(
            Fieldset(
                'Project Name',
                Row(
                    Column('name', css_class='form-group col-md-4 mb-0', readonly=True),
                )
            ),
            Fieldset(
                'APIs To Enable',
                Row(
                    Column('computeapi', css_class='form-group col-md-4 mb-0', readonly=True),
                    Column('deploymentmanapi', css_class='form-group col-md-4 mb-0', readonly=True),
                    Column('storagecompapi', css_class='form-group col-md-4 mb-0', readonly=True),
                    Column('monitorapi', css_class='form-group col-md-4 mb-0', readonly=True),
                    Column('loggingapi', css_class='form-group col-md-4 mb-0', readonly=True)
                )
            ),
            Submit('Deploy', 'Deploy', css_class='btn-success')
        )

Answer 1

在Form的构造函数中request可以通过:

通过 **kwargs 传递它，所以：

# in your view:
form = ProjectConfirm(request=request)

# in ProjectConfirm
class ProjectConfirm(forms.ModelForm):
    name = forms.CharField(widget=forms.TextInput(attrs={}))
    # etc

    def __init__(self, *args, **kwargs):
        request = kwargs.pop("request")
        super().__init__(*args, **kwargs)
        # ... and then define your widgets inside your __init__
        self.fields['name'].widget.attrs['placeholder'] = request.session["projectname"]
        # etc

通过将 Form 定义为视图的嵌套 class，但它必须是 class-view 而不是 function.Then，您可以将它传递给您的表单，但它仍然不是一个优雅的解决方案，因为它在同一个模块中混合了视图和表单。无论如何它会是这样的：

class YourView(FormView):
    def get_form_class(self):
        request = self.request
        class ProjectConfirm(forms.Form):
            # your existing form definition
        return ProjectConfirm

如果对你有帮助，请告诉我。

Django - 将会话变量从一个视图传递到另一个视图（'request' 未定义）

Django - Pass Session Variables From One View To Another ('request' is undefined)

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