How to check if record exists in django mysql before insert into database

Question

Please pardon me, am still new to djando framework. This error i always get i run it.

The view finance_lens_app.views.acct_type didn't return an HttpResponse object. It returned None instead. This is my model

class Acct_type(models.Model):
    Aid=models.AutoField(primary_key=True)
    acct_type_name=models.CharField(max_length=200)
    class Meta:
        db_table="Acct_Type"

This is my VIEW.

def acct_type(request):
    if request.method=='POST':
        request.POST.get('acct_type_name')
        acct_type_record=Acct_type()   
        acct_type_record.save()        
        messages.success(request, 'Account Type Added Successfully...')
        return render(request, "admin_opera/acct_type.html")  

My Interface HTML

<form method="POST"> 
  {% csrf_token %}
    <div class="input-group mb-3">
     <select name="acct_type_name" id="acct_type_name" class="form-control">
              <option value="Assets">Assets</option>
              <option value="Liabilities">Liabilities</option>
              <option value="Equities">Equities</option>
              <option value="Incomes">Incomes</option>
              <option value="Expenses">Expenses</option>
              <option value="Expenses2">Expenses2</option>
              <option value="Expenses3">Expenses3</option>
    </select>
   
   </div>
      <input class="btn btn-primary btn-lg" type="submit" name="submit" value="Add Account">
</form>

Answer 1

You need get the value of acct_type_name from the form, and then create the Acct_type instance and save.

def acct_type(request):
    if request.method=='POST':
        acct_type_name = request.POST.get('acct_type_name')
        acct_type_record=Acct_type(acct_type_name = acct_type_name)   
        acct_type_record.save()        
        messages.success(request, 'Account Type Added Successfully...')
        return render(request, "admin_opera/acct_type.html")  

If you want to check if a record exists, you need to implement the clean function through Django form or add unique=True to your model field.

class Acct_type(models.Model):
    Aid=models.AutoField(primary_key=True)
    acct_type_name=models.CharField(max_length=200, unique=True)
    class Meta:
        db_table="Acct_Type"