laravel API, not fetching data from DB - laravel

Question

This is on production side (on unbtu Digital Ocean server)
"laravel: 5.3"
"php": "5.5.9"
Route path : /route/web.php (not in middleware)
Route::get('api/getsymbol-request','MemberTradesController#getSymbolRequest');
Route::get('api/getsymbol','MemberTradesController#getSymbol');
Controller:
public function getSymbolRequest(Request $request){
$symbol = DB::table("symbols")
->where("market_id", $request->market_id)
->pluck("symbol","id");
return response() -> json($symbol);
}
public function getSymbol(){
$symbol = DB::table("symbols")
->pluck("symbol","id");
return response() -> json($symbol);
}
http://yourtradelog.com/api/getsymbol-request?market_id=1 //This is not working url I am getting issue WHY THIS IS NOT WORKING
http://yourtradelog.com/api/getsymbol //This is working url
Database tables
<script>
$(document).ready(function() {
$('#exchange').change(function(){
var exchangeID = $(this).val();
if(exchangeID){
$.ajax({
type:"GET",
url:"{{url('api/getsymbol-request/')}}?exchange_id="+exchangeID,
success:function(res){
if(res){
$("#market").empty();
$("#market").append('<option>Select</option>');
$.each(res,function(key,value){
$("#market").append('<option value="'+key+'">'+value+'</option>');
});
}else{
$("#market").empty();
}
}
});
}else{
$("#market").empty();
}
});
});
</script>
{!! Form::open(['method'=>'POST', 'action'=> 'MemberTradesController#store']) !!}
<div class="form-group col-sm-5">
{!! Form::label('market_id', 'Markets:') !!}
{!! Form::select('market_id', [''=>'Choose Options'] , null, ['class'=>'form-control', 'id'=>'market'])!!}
</div>
<div class="form-group col-sm-10">
{!! Form::label('symbol_id', 'Symbol:') !!}
{!! Form::select('symbol_id', [''=>'Choose Options'] , null, ['class'=>'symbol_id', 'id'=>'symbol','data-width'=>'60%', 'data-live-search'=>'true'] )!!}
</div>
<div class="form-group col-lg-4">
{!! Form::submit('Add trade', ['class'=>'btn btn-success btn-lg']) !!}
</div>
{!! Form::close() !!}

Answer 1

I prefer using route parameters like this (see more in the documentation here):
Routes:
Route::get('api/getsymbol-request/{id}','MemberTradesController#getSymbolRequest');
Route::get('api/getsymbol','MemberTradesController#getSymbol');
Controller:
public function getSymbolRequest(Request $request, $id){
$symbol = DB::table("symbols")
->where("market_id", $id)
->get()
->pluck("symbol","id");
return response() -> json($symbol);
}
public function getSymbol(){
$symbol = DB::table("symbols")
->pluck("symbol","id");
return response() -> json($symbol);
}
Please note that the URL has changed to this format:
http://yourtradelog.com/api/getsymbol-request/1

Answer 2

Try to this code:
public function getSymbolRequest(Request $request)
{
$marketID = (int)$request->get('market_id')
$symbol = DB::table('symbols')
->where('market_id', $marketID)
->get(['symbol','id']);
return response()->json($symbol);
}
public function getSymbol()
{
$symbol = DB::table('symbols')
->get(['symbol','id']);
return response()->json($symbol);
}