我正在为有特定需求的客户在项目管理网站上工作。 将项目添加到DB可以很好地工作。当我更新项目时，这些字段会随我输入的内容进行更新。但是它没有像addProject（）那样执行必要的计算。我可以单击“提交”，并且在调用updateProject（）时请求将通过，但是它不会计算任何内容。
views.py：
def calculate(subtotal, no_of_signs, sign_permit, engineering, other_fees, discount, cash_discount, tax):
total = subtotal + (sign_permit * no_of_signs) + engineering + other_fees
tax_amount = float(tax) * total
total += tax_amount
if discount > 0:
total -= total * discount
elif cash_discount > 0:
total -= cash_discount
else:
return total
return total
def addProject(request):
form = ProjectForm()
if request.method == 'POST':
# form_copy = request.POST.copy()
form_copy = request.POST
# get data used to calculate total
# .....
mutable = request.POST._mutable
request.POST._mutable = True
# ......
number_of_signs = int(form_copy['number_of_signs'])
sign_permit = float(form_copy['sign_permit'])
engineering = float(form_copy['engineering'])
other_fees = float(form_copy['other_fees'])
# project can have discount OR cash discount
discount = (float(form_copy['discount']) * .01)
cash_discount = float(form_copy['cash_discount'])
# total after discount applied
discount_total = float(form_copy['discount_total'])
deposit_amount = float(form_copy['deposit_amount'])
completion_amount = float(form_copy['completion_amount'])
# calculate percentage
deposit_percentage = float(form_copy['deposit_percentage'])
# form_copy['completion_percentage'] = 100 - deposit_percentage
request.POST['completion_percentage'] = 100 - deposit_percentage
# calculate total sign price as subtotal
# calculate subtotal given sign price
sum = 0
for i in range(number_of_signs):
i += 1
sign_order = 'mysign-' + str(i)
sum += int(form_copy[sign_order])
print(sum)
form_copy['subtotal'] = sum
subtotal = float(form_copy['subtotal'])
# if discount %, discount total = disocunt * subtotal
# if cash discount, discount total = subtotal - cash discount
if discount:
form_copy['discount_total'] = discount * subtotal
elif cash_discount:
form_copy['discount_total'] = cash_discount
# calculate total price
# form_copy['final_total'] = subtotal
form_copy['final_total'] = calculate(
subtotal, number_of_signs, sign_permit, engineering, other_fees, discount, cash_discount, form_copy['tax'])
form_copy['deposit_amount'] = (form_copy['final_total'] - (form_copy['final_total'] *
form_copy['completion_percentage'] * .01))
form_copy['completion_amount'] = (form_copy['final_total'] -
form_copy['deposit_amount'])
form = ProjectForm(form_copy)
if form.is_valid():
request.POST._mutable = mutable
form.save()
return redirect('/')
context = {
'form': form,
}
return render(request, 'pages/add_project_form.html', context)
def updateProject(request, pk):
project = Project.objects.get(id=pk)
form = ProjectForm(instance=project)
if request.method == 'POST':
form = ProjectForm(request.POST, instance=project)
# sum = 0
# for i in range(int(request.POST['number_of_signs'])):
# i += 1
# sign_order = 'mysign-' + str(i)
# sum += int(form[sign_order])
# print(sum)
# form['subtotal'] = sum
# subtotal = float(form['subtotal'])
if form.is_valid():
form.save()
return redirect('/')
context = {
'form': form,
}
return render(request, 'pages/add_project_form.html', context)
模板：add_project_form.html
{% extends 'base.html' %}
{% block content %}
<div class="container">
<form action="" method="POST" style="">
<div class="row">
{% csrf_token %}
<div class="col-sm">
<table>
{{form.as_table}}
</table>
</div>
<div class="col-sm">
<div class="container1">
<button class="add_form_field">Add New Sign
<span style="font-size:16px; font-weight:bold;">+ </span>
</button>
<div>
<input id="sign-1" type="text" name="mytext-1" placeholder="Sign Name">
<input id="price-1" type="number" name="mysign-1" placeholder="Sign Price">
</div>
</div>
<input class='btn btn-primary' type="submit" name="submit" style="margin: 25px; min-width: 100%">
</div>
</div>
</form>
</div>
{% endblock content %}
base.html中的脚本，用于根据符号计算小计。
<script type='text/javascript'>
$(document).ready(function() {
let max_fields = 10;
let wrapper = $(".container1");
let add_button = $(".add_form_field");
let x = 1;
$(add_button).click(function(e) {
e.preventDefault();
if (x < max_fields) {
x++;
$(wrapper).append(`<div><input id="sign-${x} "type="text" name="mytext-${x}" placeholder="Sign Name"/><input id="price-${x} "type="number" name="mysign-${x}" placeholder="Sign Price"/><a href="#" class="delete">Delete</a></div>`); //add input box
} else {
alert('You Reached the limits')
}
});
$(wrapper).on("click", ".delete", function(e) {
e.preventDefault();
$(this).parent('div').remove();
x--;
})
});
</script>
答案 0 :(得分：0)
将尝试回答并为您提供一些改进建议
addProject重命名为add_project，将updateProject重命名为update_project，但更好的选择是制作一个基于类的视图处理POST以创建并打补丁以更新表单。这样，您可以使用1个视图来创建和更新redirect('/')代替直接使用reverse的forms，以避免用str，float等包装值的麻烦，因为Django表单会将提交的数据验证并序列化为Python类型。 现在，关于您的直接问题，似乎在调用updateProject时您没有进行任何修改。
您应以正确的方式使用forms.ModelForm来获取数据并修改模型中的值。即在save()或属性中。