我收到MultiValueKeyDictError时遇到了这个错误，我使用了POST.get但比我得到了这个错误
IntegrityError at /personal_detail/
NOT NULL constraint failed: users_personal_detail.beneficiary_adhaar_name
Request Method: POST
Request URL: http://127.0.0.1:8000/personal_detail/
Django Version: 3.0.3
Exception Type: IntegrityError
Exception Value:
NOT NULL constraint failed: users_personal_detail.beneficiary_adhaar_name
Exception Location: C:\Python\Python38\lib\site-packages\django\db\backends\sqlite3\base.py in execute, line 396
Python Executable: C:\Python\Python38\python.exe
Python Version: 3.8.1
Python Path:
['C:\\pradhan-mantri-matru-vandana-yojana\\pmmvy',
'C:\\Python\\Python38\\python38.zip',
'C:\\Python\\Python38\\DLLs',
'C:\\Python\\Python38\\lib',
'C:\\Python\\Python38',
'C:\\Users\\diwas\\AppData\\Roaming\\Python\\Python38\\site-packages',
'C:\\Python\\Python38\\lib\\site-packages']
我的views.py看起来像这样，我使用“ get”来避免出现MultiValueKeyDictError
def ApplyOnline(request):
return render(request,'users/applyonline.html')
@login_required
def personal_detail(request):
# ShowHideExample = request.POST.get('showHideExample',False)
beneficiary_adhaar_name=request.POST.get('beneficiary_adhaar_name')
adhaarno=request.POST.get('adhaarno')
# adhaarcopy =request.POST['adhaarcopy']
idcard=request.POST.get('idcard')
adhaar_eid=request.POST.get('eid')
beneficiary_id_name=request.POST.get('beneficiary_id_name')
idno=request.POST.get('idno')
# idcopy=request.POST['idcopy']
apply_online = Personal_Detail(beneficiary_adhaar_name=beneficiary_adhaar_name,adhaarno=adhaarno,
idcard=idcard,adhaar_eid=adhaar_eid,beneficiary_id_name=beneficiary_id_name,idno=idno)
apply_online.save()
return render(request,'users/applyonline.html')
models.py（我尝试使用idno = request.POST.get（'idno'，null = True），但它不起作用）
class Personal_Detail(models.Model):
beneficiary_adhaar_name=models.CharField(max_length=30)
adhaarno=models.IntegerField()
adhaarcopy = models.ImageField(upload_to='adhaar/')
idcard=models.TextField()
adhaar_eid=models.IntegerField()
beneficiary_id_name=models.CharField(max_length=30)
idno=models.IntegerField()
idcopy=models.ImageField(upload_to='identitycard/')
def __str__(self):
return self.beneficiary_adhaar_name + self.beneficiary_id_name
我尝试在idcard = request.POST.get（'idcard'，null = True）之类的视图中使用nulll = False，但是再次遇到无法与null或类似内容关联的错误。
applyonline.html
<body ng-app="">
{% extends "pmmvyapp/base.html" %}
{% load crispy_forms_tags %}
{% load static %}
{% block content%}
<div class="col-md-8">
<form method="post" action="/personal_detail/">
{% csrf_token %}
<div class="form-group">
<div class=" mb-4">
<h6><u>(*Mandatory Fields)Please Fill up the details below </u></h6>
</div>
<legend class="border-bottom mb-4" ,align="center">1.Beneficiary Details</legend>
<label for="formGropuNameInput">Does Beneficiary have an Adhaar Card?*</label>
<input type="radio" name="showHideExample" ng-model="showHideTest" value="true">Yes
<input type="radio" name="showHideExample" ng-model="showHideTest" value="false">No
<!--logic for yes-->
<div ng-if="showHideTest=='true'">
<div class="form-group">
<label for="formGropuNameInput">Name of Beneficiary(as in Aadhar Card)*</label>
<input name="beneficiary_adhaar_name" class="form-control" id="formGroupNameInput" placeholder="Enter name of Beneficiary as in Aadhar Card">
</div>
<div class="form-group">
<label for="formGropuNameInput">Aadhaar Number(Enclose copy of Aadhaar Card)*:</label>
<input name="adhaarno" class="form-control" id="aadhar" pattern="^\d{4}\s\d{4}\s\d{4}$" placeholder="Enter Aadhar Card number with proper spacing">
</div>
<!--<div class="custom-file">
<input type="file" class="custom-file-input" id="customFile" name="adhaaarcopy">
<label class="custom-file-label" for="customFile">Choose file</label>
</div>-->
</div>
<!--logic for no-->
<div ng-if="showHideTest=='false'">
<div class="form-group">
<label for="formGroupDistrict">Please provide any of the following Identity Card*:</label>
<select name="idcard" id="formGroupDistrict">
<option value="1">Bank or Post Office photo passbook</option>
<option value="2">Voter ID Card</option>
<option value="3">Ration Card</option>
<option value="4">Kishan Photo Passbook</option>
<option value="5">Passport</option>
<option value="6">Driving License</option>
<option value="6">PAN Card</option>
<option value="7">MGNREGS Job Card</option>
<option value="8">Her husband's Employee Photo Identity Card issued by the government
or any Public Sector Undertaking</option>
<option value="9">Any other Photo Identity Card issued by State Government or Union Territory Administrations</option>
<option value="10">Certificate of Identity with photograph issued by a Gazetted Officer on Official letterhead</option>
<option value="11">Health Card issued by Primary Health Centre(PHC) or Government Hospital</option>
<option value="12">Any other document specified by the State Government or Union Territory Adminstration</option>
</select>
</div>
<div class="form-group">
<label for="adhaar_eid">Aadhaar Enrollment ID(EID):</label>
<input name="adhaar_eid" class="form-control" id="aadhar"
placeholder="Enter Aadhar Enrollment ID">
</div>
<div class="form-group">
<label for="formGropuNameInput">Name of Beneficiary(as in Identity Card)* </label>
<input name="beneficiary_id_name" class="form-control" id="formGroupNameInput" placeholder="Enter your name">
</div>
<div class="form-group">
<label for="idno">Identity Number(Enclose Copy of Identity Card)*:</label>
<input name="idno" id="identityno" class="form-control">
</div>
<!-- <div class="custom-file">
<input type="file" class="custom-file-input" name="idcopy" id="customFile">
<label class="custom-file-label" for="customFile">Choose file</label>
</div>-->
</div>
</div>
<!-- <div class="form-group form-check">
<input name="checkbox" class="form-check-input" id="exampleCheck1" required>
<label class="form-check-label" for="exampleCheck1">Check me out</label>
</div>-->
<button type="submit" class="btn btn-primary" style="margin-bottom:10px ">Submit</button>
</form>
</div>
{% endblock %}
</body>
```This is the html applyonline.html
答案 0 :(得分：1)
idcard=request.POST.get('idcard',null=True)
这在Python中无效。如果您未指定默认值，则get()方法将返回None，因此您可以执行以下操作：
idcard=request.POST.get('idcard')
然后，如果要使其接受空值，则需要在模型字段中设置null=True。
class Personal_Detail(models.Model):
...
idno=models.IntegerField(blank=True, null=True)
blank=True表示表单将接受空值。
最后，如果您像这样更改模型，则必须先运行python manage.py makemigrations，然后运行python manage.py migrate才能创建迁移并将其应用于数据库。
答案 1 :(得分：0)
将blank=True添加到CharField，不要忘记迁移更改。
beneficiary_adhaar_name=models.CharField(null=True,blank=True)