取款系统在 OnetoOneField 中出现 IntegrityError。第一次一切正常然后出现错误
Money withdraw System got IntegrityError in OnetoOneField. All Works ok for first time then gets error
我的 model.py 中有三个 table - Account、withdraw、taxDetails。我在帐户 table 中有一个已归档的总金额 (total_amnt_WoP)。场景是，当我尝试提取金额时，它会减少总金额并从中减少一些税（提取金额的 10%）并且每次都会保存在 taxDetails table 中.我试图在 table.
中存储总税额
在我的情况下，它第一次提取时工作正常（在 taxDetails table 中节省税款）。但是当我第二次尝试退出时，它得到：
IntegrityError.(IntegrityError at /account_balance/withdraw/, UNIQUE constraint failed: account_balance_taxdetails.user_id)
当我从 withdraw table (withdraw.objects.all().delete()) 或 taxDetails (taxDetails.objects.all().delete()) table 中删除所有对象时，它工作正常，但只是第一次。那么有什么解决办法呢？
这是我的 models.py 文件：
class Account(models.Model):
purchase_amnt=models.FloatField()
ref_amnt=models.FloatField()
prantic_amnt=models.FloatField()
middle_amnt=models.FloatField()
ehp_amnt=models.FloatField()
esp_amnt=models.FloatField()
incentive_amnt=models.FloatField()
user=models.ForeignKey(User, blank=True, null=True, on_delete=models.CASCADE)
total_amnt_WoP= models.FloatField()
class withdraw(models.Model):
account=models.ForeignKey(Account, on_delete=models.CASCADE)
user=models.OneToOneField(User, blank=True, null=True, on_delete=models.CASCADE)
prev_amnt=models.FloatField(blank=True, null=True, default=0)
current_amnt=models.FloatField(blank=True, null=True, default=0)
adjast_amnt=models.FloatField(blank=True, null=True, default=0)
requisation_amnt=models.FloatField(blank=True, null=True, default=0)
total_cashout_amnt=models.FloatField(default=0)
transaction_id=models.CharField(max_length=100,blank=True, null=True)
status=models.BooleanField(default=False)
#purchase percentage
prev_pur_tot=models.FloatField(blank=True, null=True, default=0)
cashout_pur_tot=models.FloatField(default=0)
current_pur_tot=models.FloatField(blank=True, null=True, default=0)
created_at=models.DateTimeField(auto_now_add=True)
modified_at=models.DateTimeField(auto_now=True)
class taxDetails(models.Model):
withdra=models.ForeignKey(withdraw, on_delete=models.CASCADE, null=True)
user=models.OneToOneField(User, null=True, on_delete=models.CASCADE)
tax_prev=models.FloatField(default=0)
tax_curr=models.FloatField(default=0)
tax_amount_tot=models.FloatField(default=0)
tax_id=models.CharField(max_length=100)
tax_pay_date=models.DateTimeField(auto_now=True)
tax_info_law=models.CharField(max_length=155, blank=True, null=True)
tax_given_area=models.CharField(max_length=100,blank=True, null=True)
tax_medium=models.CharField(max_length=100, blank=True, null=True)
tax_description=models.CharField(max_length=100, blank=True, null=True)
views.py 文件:
from django.contrib import messages
from .models import Account, withdraw, tax, taxDetails
import datetime
from django.utils import timezone
from .forms import withdrawForm
from django.contrib.auth.models import User
#calculating total amount
def accountBalanceCalculation(request):
acc=Account.objects.all()
for i in acc:
obj=Account.objects.get(id=i.id)
pur=i.purchase_amnt
ref=i.ref_amnt
prantic=i.prantic_amnt
middle=i.middle_amnt
ehp=i.ehp_amnt
esp=i.esp_amnt
incentive=i.incentive_amnt
totalamnts=(incentive+esp+ehp+middle+prantic+ref+pur)
obj.total_amnt_WoP=totalamnts
obj.save()
# Taking additional values from account table to withdraw table
obj2=withdraw()
obj2.account=obj
obj2.user= i.user
obj2.prev_amnt= totalamnts
obj2.current_amnt= totalamnts
obj2.prev_pur_tot = pur
obj2.save()
return render(request,'account_balance/show.html')
def withdrawView(request):
tt=Account.objects.filter().values_list('total_amnt_WoP')
ttt=tt[0]
if request.method == "POST":
form=withdrawForm(request.POST)
if form.is_valid():
requisation_amnt=form.cleaned_data['requisation_amnt'] # withdraw amount
print('---------------------requisation_amnt to withdraw --------------')
print(requisation_amnt)
obj=withdraw.objects.filter(user__id=request.user.id).first()
# purchase percenetage calculated for 10%
purchase_percentage=(obj.prev_pur_tot/obj.prev_amnt)*100
print("purchase_percentage checkup for 10%")
print(purchase_percentage)
if purchase_percentage>=10 and obj.prev_amnt>=1: #check the conditions for withdraw
transaction_id='1kfTxx56jlj' #Static input from admin
obj.transaction_id = transaction_id
obj.requisation_amnt=requisation_amnt
temp_amt = obj.total_cashout_amnt + requisation_amnt
obj.total_cashout_amnt= temp_amt
obj.current_amnt= obj.prev_amnt - temp_amt
#Cutting the tax 10 %
tax_percentage_amnt=(10/100)* requisation_amnt
after_tax_bal=requisation_amnt- tax_percentage_amnt
print("------------ after_tax_The_balance_is -------------:")
print(after_tax_bal)
abc=User.objects.get(id=request.user.id)
obj3=taxDetails()
obj3.user=abc
obj3.withdra=obj
obj3.tax_prev= tax_percentage_amnt
obj3.tax_curr= tax_percentage_amnt
obj3.tax_amount_tot= obj3.tax_amount_tot + tax_percentage_amnt
obj3.save() # This line cases the error, every time...
x = obj.prev_pur_tot
pur_per_amnt= (10/100)* x
print("-------------- purchase amnt in 10 percent scale--------")
print(pur_per_amnt)
y = obj.cashout_pur_tot + pur_per_amnt
obj.cashout_pur_tot = y
obj.current_pur_tot= x - y
obj.save()
# obj.modified_at=timezone.now()
messages.success(request, 'Your request is accepted!')
return redirect('/account_balance/withdraw/')
else:
print("error")
else:
form=withdrawForm()
context={
'form': form,
'ttt': ttt,
}
return render(request,'account_balance/withdraw.html', context)
form.py 文件:
from .models import Account, withdraw
class withdrawForm(forms.ModelForm):
class Meta:
model = withdraw
fields = ['requisation_amnt']
模板：
{% extends 'basic.html' %}
{% load crispy_forms_tags %}
{% block body %}
<div class="card mt-5">
<div class="card-body">
<div class="col-md-6 offset-md-3">
<form action="" method="post">
{% csrf_token %}
{{form|crispy}}
<button type="submit" class="btn btn-primary">withdraw</button>
</form>
</div>
</div>
</div>
{% endblock body %}
url.py 文件:
from .views import accountBalanceCalculation, withdrawView
app_name='account_balance'
urlpatterns = [
path('accntbal/', accountBalanceCalculation, name="accntbal"),
path('withdraw/', withdrawView, name="withdraw"),
]
# http://127.0.0.1:8000/account_balance/accntbal/
# http://127.0.0.1:8000/account_balance/withdraw/
问题出在你的代码中，当你第一次添加记录时，它会保存在你的数据库中，但接下来当你为具有相同 ID 的同一用户添加新记录时，它会给出 UNIQUE constraint failed: 的错误，你必须更新它而不是添加它。
例如，您必须在添加针对同一用户或新用户的记录之前进行检查
try:
if User.objects.get(id=request.user.id).exists():
update data...
else:
create new record..
except Exception as e:
print('Error : ',e)
我的 model.py 中有三个 table - Account、withdraw、taxDetails。我在帐户 table 中有一个已归档的总金额 (total_amnt_WoP)。场景是，当我尝试提取金额时，它会减少总金额并从中减少一些税（提取金额的 10%）并且每次都会保存在 taxDetails table 中.我试图在 table.
在我的情况下，它第一次提取时工作正常（在 taxDetails table 中节省税款）。但是当我第二次尝试退出时，它得到：
IntegrityError.(IntegrityError at /account_balance/withdraw/, UNIQUE constraint failed: account_balance_taxdetails.user_id)
当我从 withdraw table (withdraw.objects.all().delete()) 或 taxDetails (taxDetails.objects.all().delete()) table 中删除所有对象时，它工作正常，但只是第一次。那么有什么解决办法呢？
这是我的 models.py 文件：
class Account(models.Model):
purchase_amnt=models.FloatField()
ref_amnt=models.FloatField()
prantic_amnt=models.FloatField()
middle_amnt=models.FloatField()
ehp_amnt=models.FloatField()
esp_amnt=models.FloatField()
incentive_amnt=models.FloatField()
user=models.ForeignKey(User, blank=True, null=True, on_delete=models.CASCADE)
total_amnt_WoP= models.FloatField()
class withdraw(models.Model):
account=models.ForeignKey(Account, on_delete=models.CASCADE)
user=models.OneToOneField(User, blank=True, null=True, on_delete=models.CASCADE)
prev_amnt=models.FloatField(blank=True, null=True, default=0)
current_amnt=models.FloatField(blank=True, null=True, default=0)
adjast_amnt=models.FloatField(blank=True, null=True, default=0)
requisation_amnt=models.FloatField(blank=True, null=True, default=0)
total_cashout_amnt=models.FloatField(default=0)
transaction_id=models.CharField(max_length=100,blank=True, null=True)
status=models.BooleanField(default=False)
#purchase percentage
prev_pur_tot=models.FloatField(blank=True, null=True, default=0)
cashout_pur_tot=models.FloatField(default=0)
current_pur_tot=models.FloatField(blank=True, null=True, default=0)
created_at=models.DateTimeField(auto_now_add=True)
modified_at=models.DateTimeField(auto_now=True)
class taxDetails(models.Model):
withdra=models.ForeignKey(withdraw, on_delete=models.CASCADE, null=True)
user=models.OneToOneField(User, null=True, on_delete=models.CASCADE)
tax_prev=models.FloatField(default=0)
tax_curr=models.FloatField(default=0)
tax_amount_tot=models.FloatField(default=0)
tax_id=models.CharField(max_length=100)
tax_pay_date=models.DateTimeField(auto_now=True)
tax_info_law=models.CharField(max_length=155, blank=True, null=True)
tax_given_area=models.CharField(max_length=100,blank=True, null=True)
tax_medium=models.CharField(max_length=100, blank=True, null=True)
tax_description=models.CharField(max_length=100, blank=True, null=True)
views.py 文件:
from django.contrib import messages
from .models import Account, withdraw, tax, taxDetails
import datetime
from django.utils import timezone
from .forms import withdrawForm
from django.contrib.auth.models import User
#calculating total amount
def accountBalanceCalculation(request):
acc=Account.objects.all()
for i in acc:
obj=Account.objects.get(id=i.id)
pur=i.purchase_amnt
ref=i.ref_amnt
prantic=i.prantic_amnt
middle=i.middle_amnt
ehp=i.ehp_amnt
esp=i.esp_amnt
incentive=i.incentive_amnt
totalamnts=(incentive+esp+ehp+middle+prantic+ref+pur)
obj.total_amnt_WoP=totalamnts
obj.save()
# Taking additional values from account table to withdraw table
obj2=withdraw()
obj2.account=obj
obj2.user= i.user
obj2.prev_amnt= totalamnts
obj2.current_amnt= totalamnts
obj2.prev_pur_tot = pur
obj2.save()
return render(request,'account_balance/show.html')
def withdrawView(request):
tt=Account.objects.filter().values_list('total_amnt_WoP')
ttt=tt[0]
if request.method == "POST":
form=withdrawForm(request.POST)
if form.is_valid():
requisation_amnt=form.cleaned_data['requisation_amnt'] # withdraw amount
print('---------------------requisation_amnt to withdraw --------------')
print(requisation_amnt)
obj=withdraw.objects.filter(user__id=request.user.id).first()
# purchase percenetage calculated for 10%
purchase_percentage=(obj.prev_pur_tot/obj.prev_amnt)*100
print("purchase_percentage checkup for 10%")
print(purchase_percentage)
if purchase_percentage>=10 and obj.prev_amnt>=1: #check the conditions for withdraw
transaction_id='1kfTxx56jlj' #Static input from admin
obj.transaction_id = transaction_id
obj.requisation_amnt=requisation_amnt
temp_amt = obj.total_cashout_amnt + requisation_amnt
obj.total_cashout_amnt= temp_amt
obj.current_amnt= obj.prev_amnt - temp_amt
#Cutting the tax 10 %
tax_percentage_amnt=(10/100)* requisation_amnt
after_tax_bal=requisation_amnt- tax_percentage_amnt
print("------------ after_tax_The_balance_is -------------:")
print(after_tax_bal)
abc=User.objects.get(id=request.user.id)
obj3=taxDetails()
obj3.user=abc
obj3.withdra=obj
obj3.tax_prev= tax_percentage_amnt
obj3.tax_curr= tax_percentage_amnt
obj3.tax_amount_tot= obj3.tax_amount_tot + tax_percentage_amnt
obj3.save() # This line cases the error, every time...
x = obj.prev_pur_tot
pur_per_amnt= (10/100)* x
print("-------------- purchase amnt in 10 percent scale--------")
print(pur_per_amnt)
y = obj.cashout_pur_tot + pur_per_amnt
obj.cashout_pur_tot = y
obj.current_pur_tot= x - y
obj.save()
# obj.modified_at=timezone.now()
messages.success(request, 'Your request is accepted!')
return redirect('/account_balance/withdraw/')
else:
print("error")
else:
form=withdrawForm()
context={
'form': form,
'ttt': ttt,
}
return render(request,'account_balance/withdraw.html', context)
form.py 文件:
from .models import Account, withdraw
class withdrawForm(forms.ModelForm):
class Meta:
model = withdraw
fields = ['requisation_amnt']
模板：
{% extends 'basic.html' %}
{% load crispy_forms_tags %}
{% block body %}
<div class="card mt-5">
<div class="card-body">
<div class="col-md-6 offset-md-3">
<form action="" method="post">
{% csrf_token %}
{{form|crispy}}
<button type="submit" class="btn btn-primary">withdraw</button>
</form>
</div>
</div>
</div>
{% endblock body %}
url.py 文件:
from .views import accountBalanceCalculation, withdrawView
app_name='account_balance'
urlpatterns = [
path('accntbal/', accountBalanceCalculation, name="accntbal"),
path('withdraw/', withdrawView, name="withdraw"),
]
# http://127.0.0.1:8000/account_balance/accntbal/
# http://127.0.0.1:8000/account_balance/withdraw/
问题出在你的代码中，当你第一次添加记录时，它会保存在你的数据库中，但接下来当你为具有相同 ID 的同一用户添加新记录时，它会给出 UNIQUE constraint failed: 的错误，你必须更新它而不是添加它。
例如，您必须在添加针对同一用户或新用户的记录之前进行检查
try:
if User.objects.get(id=request.user.id).exists():
update data...
else:
create new record..
except Exception as e:
print('Error : ',e)