如何显示来自模型方法的数据

Question

大家晚上好

我是编程新手，我一直在做一个 Django 项目来提高我的技能。

我想在我的模板中显示来自方法模型的数据。

这是项目的模型，

class Company(models.Model):
    #Company data
    company_name = models.CharField(max_length=100)
    outstanding_shares = models.IntegerField()
    share_price = models.DecimalField(max_digits= 5, decimal_places=2)
    revenue = models.IntegerField()
    expenses = models.IntegerField()
    total_assets = models.IntegerField()
    total_liabilities = models.IntegerField()
    current_assets = models.IntegerField()
    current_liabilities = models.IntegerField()
    operating_cashflows = models.IntegerField()
    capex = models.IntegerField()
    
    #Date of creation
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now= True)    
        
    def __str__(self):
        return self.company_name

    #Company methods
        
    def net_income(self):        
        return self.revenue - self.expenses

这是视图文件，

def tools(request):
    submitted = False
    form = CompanyForm()
    if request.method == 'POST':
        print(request.POST)
        form = CompanyForm(request.POST)
        if form.is_valid():
            form.save()        
        return HttpResponseRedirect('/simple_investing/tools?submitted=True')

    else:
        form = CompanyForm        
        if 'submitted' in request.GET:
            submitted = True
        context = {'form': form, 'submitted': submitted}    
        return render(request, 'simple_investing/tools.htm', context)

这是表格文件，

class CompanyForm(ModelForm):
    class Meta:
        model = Company
        fields = ('company_name', 'outstanding_shares', 'share_price', 'revenue', 'expenses', 'total_assets','total_liabilities', 'current_assets','current_liabilities', 'operating_cashflows', 'capex')
        widgets = {
            'company_name': forms.TextInput(attrs={'class': 'form-control', 'placeholder' : 'Company name'}),
            'outstanding_shares': forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Shares outstanding'}),
            'share_price' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Share price'}),
            'revenue' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Revenue'}),
            'expenses' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Expenses'}),
            'total_assets' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Total Assets'}),
            'total_liabilities' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Total Liabilities'}),
            'current_assets' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Current Assets'}),
            'current_liabilities' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Current Liabilities'}),
            'operating_cashflows' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Operating Cashflows'}),
            'capex' :forms.NumberInput(attrs={'class': 'form-control', 'placeholder' : 'Capital Expenditure'}),
            
        }

这是模板文件，

<body>
{% if submitted %}
    Your company was submitted successfully. Hereunder is your company's net income:
    {{% Company.net_income %}}
{% else %}

<p>In this section, we will analyze the fundamentals of a company of your choice. The goal is to assess if the <strong><i>stock market</i></strong> is offering us an investment opportunity. </p>
<p>Let's start by entering the data of the company that you are interested in: </p>
    
<div class="row g-3">                  
    <form action ="" method="post">
        {% csrf_token %}
        {{form.as_p}}
        <button type="submit" class="btn btn-success">Submit</button> 
        
    </form>

我收到以下错误：

Could not parse the remainder: '% Company.net_income %' from '% Company.net_income %'

关于如何解决这个问题有什么想法吗？

Answer 1

在模板文件中

删除：{{% Company.net_income %}}
试试这个：{{ Company.net_income }}

如何显示来自模型方法的数据

How to display data from a model method

django

django-templates

django-models

django-forms

django-views