How to update or create at same time in laravel - laravel

Question

``I had one page on that I'm Showing data from two table with left join and also edit button in front of every column when user click to edit button ,it goes a different page where user can update input fields but at the same time i want if some field is not showing data we can create data only when both the id of tables are matching
By this i can easily update but i can't create it shows error
Attempt to assign property "SchemeId" on null
Controller
public function SchConfigrationUpdate(Request $request, $SchemeId)
{
$scheme = tbl_schemeconfigration::find($SchemeId);
$scheme->SchemeId = $request->input('SchemeId');
$scheme->MerchantCode = $request->input('MerchantCode');
$scheme->BankAccountNumber = $request->input('BankAccountNumber');
$scheme->BankAccountIFSC = $request->input('BankAccountIFSC');
$scheme->save();
return redirect()
->back()
->with('success', 'Scheme Update Successfully');
}
**view**
<form action="{{ url('SchConfigration-update/' . $user->SchemeId) }}" method="post"
enctype="multipart/form-data">
#csrf
#method('PUT')
<input type="hidden" name="SchemeId" value="{{ $user->SchemeId }}">
<div class="form_row">
<div class="form_item">
<label>Scheme Name</label>
<input type="text" id="SchemeId" name="SchemeId"
placeholder="Enter scheme name" class="form-control" required
value="{{ $user->SchemeId }}">
{{-- value="{{ request()->SchemeId }}" --}}
{{-- if we want to pass scheme name just pass $user->SchemeName --}}
</div>
<div class="form_item">
<label>Merchant Code</label>
<input type="text" id="MerchantCode" name="MerchantCode"
placeholder="Enter Merchant Code" class="form-control" required
value="{{ $user->MerchantCode }}">
</div>
</div>
<div class="form_row">
<div class="form_item">
<label>Bank Account Number</label>
<input type="text" id="BankAccountNumber" name="BankAccountNumber"
placeholder="Bank account Number" maxlength="17" class="form-control" required
value="{{ $user->BankAccountNumber }}">
</div>
<div class="form_item">
<label>Bank Account IFSC</label>
<input type="text" id="BankAccountIFSC" name="BankAccountIFSC"
placeholder="Bank account IFSC" maxlength="11" class="form-control" required
value="{{ $user->BankAccountIFSC }}">
</div>
</div>
<div class="btn_row">
<input type="submit" value="submit" class="primary_btn">
<a class="btn btn-primary" href="{{ url('SchConfigration') }}"
role="button">Back</a>
</div>
</form>
`

Answer 1

Try This
public function SchConfigrationUpdate(Request $request, $SchemeId)
{
$scheme = tbl_schemeconfigration::updateOrCreate(
['SchemeId' => $request->input('SchemeId')],
[
'MerchantCode' => $request->input('MerchantCode'),
'BankAccountNumber' => $request->input('BankAccountNumber'),
'BankAccountIFSC' => $request->input('BankAccountIFSC')
]
);
return redirect()
->back()
->with('success', 'Scheme Update Successfully');
}