Not getting specific object using foreign key relationship in django

I am facing an issue where I'm trying to get an Egg item object by using foreign key relationship but it again and again show me this error

Some Error Occurred While Saving Data: Egg matching query does not exist.

My models are:

class SaleReturnItem(models.Model):
salereturn = models.ForeignKey(
    SaleReturn,
    on_delete=models.CASCADE,related_name="salereturnitem"
)
saleReturnItemName=models.ForeignKey(Egg, on_delete=models.CASCADE, related_name='salereturnitemegg',null=True)
saleReturnItemQuantity=models.CharField(max_length=15,null=True)
saleReturnItemUnitPrice=models.CharField(max_length=15,null=True)
saleReturnItemTotalAmount=models.CharField(max_length=15,null=True)
saleReturnItemDiscount=models.CharField(max_length=15,null=True)
saleReturnItemDiscountPrice=models.CharField(max_length=15,null=True)

class Egg(models.Model):
user = models.ForeignKey(
    get_user_model(),
    on_delete=models.CASCADE,default=1
)
eggName = models.TextField(null=True)
eggInSection = models.ForeignKey(Section, on_delete=models.CASCADE, related_name='eggsection',default=1)
eggSalePrice = models.CharField(max_length=15,default=False)
eggPurchasePrice = models.CharField(max_length=15,default=False)
eggStockLimit = models.IntegerField(default=False)
eggStockQuantity = models.IntegerField(default=False)
eggInCategory = models.ForeignKey(Category, on_delete=models.CASCADE, related_name='eggcategory',default=1)
eggExpiryDate = models.DateField(blank=True, null=True)
eggGst = models.DecimalField(max_digits=5, decimal_places=2,default=False)

and my view function is this

def saleReturn(request):
if not request.user.is_authenticated:
    return redirect('login')
elif request.user.userRole != 'admin':
    return render(request, 'pages/404.html')
else:
    if request.method == "POST":
        try:
            searchSaleInvoiceId = request.POST.get('searchSaleInvoice')
            searchSaleInvoice = SaleInvoice.objects.get(id=searchSaleInvoiceId)
            invoiceDateSaleReturn = request.POST.get('invoiceDateSaleReturn')

            saleReturnObject = SaleReturn(
                user=request.user,
                searchSaleInvoice=searchSaleInvoice,
                invoiceDateSaleReturn=invoiceDateSaleReturn,
            )
            saleReturnObject.invoiceDateSaleReturn = date.today()
            saleReturnObject.save()
            print("saleReturnObject",saleReturnObject)

            saleReturnItemNameId = request.POST.get('saleReturnItemName')
            saleReturnItem = Egg.objects.get(eggName=saleReturnItemNameId)
            print("-----------------1----------------------")
           
            saleReturnItemNameId = saleReturnItem.id
           
            

            saleReturnItemQuantity = request.POST.getlist('saleReturnItemQuantity')
            saleReturnItemUnitPrice = request.POST.getlist('saleReturnItemUnitPrice')
            saleReturnItemDiscount = request.POST.getlist('saleReturnItemDiscount')

            totalSaleAmountSaleReturn = 0.0
            saleInvoiceAmountSaleReturn = 0.0
            saleInvoiceDiscountSaleReturn = 0.0

            for saleReturnItemNameId,quantity, price, discount,  in zip(saleReturnItemNameIds,
                saleReturnItemQuantity, saleReturnItemUnitPrice, saleReturnItemDiscount
            ):
                saleReturnItemName = next(item for item in saleReturnItemNames if item.id == int(saleReturnItemNameId))
                total_amount = int(quantity) * float(price)
                if discount == '':
                    discount = 0.0
                else:
                    discount = float(discount)
                discounted_amount = total_amount - discount

                # item_name = saleReturnItemNames.get(id=item_id)

                saleReturnItemObject = SaleReturnItem(
                    salereturn=saleReturnObject,
                    saleReturnItemName_id=saleReturnItemNameId,
                    saleReturnItemQuantity=quantity,
                    saleReturnItemUnitPrice=price,
                    saleReturnItemTotalAmount=str(total_amount),
                    saleReturnItemDiscount=discount,
                    saleReturnItemDiscountPrice=str(discounted_amount)
                )
                saleReturnItemObject.save()
                print("saleReturnItemObject",saleReturnItemObject)

                # Adding Item in Egg
                Egg.objects.filter(id=item_name.saleInvoiceItemName.id).update(
                    eggStockQuantity=F('eggStockQuantity') + int(quantity)
                )

                totalSaleAmountSaleReturn += total_amount
                saleInvoiceAmountSaleReturn += discounted_amount
                saleInvoiceDiscountSaleReturn += discount

            saleReturnObject.totalSaleAmountSaleReturn = float(totalSaleAmountSaleReturn)
            saleReturnObject.saleInvoiceAmountSaleReturn = float(saleInvoiceAmountSaleReturn)
            saleReturnObject.saleInvoiceDiscountSaleReturn = float(saleInvoiceDiscountSaleReturn)
            saleReturnObject.save()

            messages.success(request, 'Record Saved Successfully.')
            return redirect('saleReturn')
        except Exception as e:
            messages.error(request, f'Some Error Occurred While Saving Data: {str(e)}')

    saleReturnData = SaleReturn.objects.all()
    results = SaleInvoice.objects.all()
   

    return render(request, 'pages/addSaleReturn.html', {'saleReturnData': saleReturnData, 'results': results})

and my html is this

<tbody class="table-border-bottom-0" id="item-table-body">
    <tr class="item-row">
        <td>
            <h6 class="item-number"/>
        </td>
        <td>
            <input type="text" id="saleReturnItemNameId" name="saleReturnItemName"
                class="form-control item-name" placeholder="Search"
                style="height: 40px; width: 150px;"/>
            <!-- <input type="text" id="saleReturnItemNameId" name="saleReturnItemName" class="form-control item-name" placeholder="Search" style="height: 40px; width: 150px;"/>                                                                    -->
        </td>
        <td>
            <input for="saleReturnItemQuantity" type="number" class="form-control item-quantity"
                id="saleReturnItemQuantityId" name="saleReturnItemQuantity"
                style="height: 40px; width: 150px;"/>
        </td>
        <td>
            <input type="string" class="form-control item-price" id="saleReturnItemUnitPriceId"
                name="saleReturnItemUnitPrice"/>

        </td>
        <td>
            <input type="number" class="form-control item-total-amount"
                id="saleReturnItemTotalAmountId" name="saleReturnItemTotalAmount"/>

        </td>

        <td>
            <input type="number" class="form-control item-discount" id="saleReturnItemDiscountId"
                name="saleReturnItemDiscount"/>

        </td>
        <td>
            <input type="number" class="form-control item-discounted-amount"
                id="saleReturnItemDiscountPriceId" name="saleReturnItemDiscountPrice"/>

        </td>
    </tr>
</tbody>

The main concept is I'm getting SaleReturn items and that items are retrieved from Egg model but I tried hard and I am not getting the egg object.

There must be some spelling error in case of eggName.

Make sure the value that you are passing in the "get" query has exact same spelling

Or you can modify your query a little bit if you are receiving value in lower case or different from what is saved in the DB
For eg,
If 'Abc' is saved in DB and you are passing the value "abc" in the get query, it will give you error.

To resolve this, you can modify your query

Egg.objects.get(eggName__iexact=saleReturnItemNameId)

Although it is not recommended to use string matching in case of get query. You should send the id of the instance to make a get query.

Something like this:

Egg.objects.get(id=<INSTANCE ID>)