如何使用For循环将数据插入数据库？

Question

我通过使用for循环将产品数据的数量插入数据库，流程就像首先生成发票，然后将发票数据添加到数据库中，然后在productdetails表中添加产品详细信息数据，但是当我插入发票数据时，它将插入正确，但是当我在productdetails表中插入数据时，它将添加两个相同的记录，即最后一个产品。它跳过第一个产品，并添加第二个和最后一个产品两次

for产品详细信息环节

  `        for (int m = 0; m < orderDetailsList.size(); m++) {

        //  pname,unitname,quantityname,pricename,discountname;

        pname = orderDetailsList.get(m).getProductname2();
        Log.e("&&&&&&%%%Productname", pname);

        unitname = orderDetailsList.get(m).getProductunit2();
        Log.e("&&&&&&%%%price2", String.valueOf(unitname));

        quantityname = orderDetailsList.get(m).getProductquantity2();
        Log.e("&&&&&&%%%quantity2", String.valueOf(quantityname));

        discountname = orderDetailsList.get(m).getProductdiscount2();
        Log.e("&&&&&&%%%quantity2", String.valueOf(discountname));

        pricename = orderDetailsList.get(m).getProductquantity2();
        Log.e("&&&&&&%%%quantity2", String.valueOf(pricename));

        Productwisetotalname = orderDetailsList.get(m).getProductwisetotal2();
        Log.e("&&&&&&%%%quantity2", String.valueOf(Productwisetotalname));


        StringRequest stringRequest = new StringRequest(Method.POST,
                Constants.URL_ADDINVOICEDETAILS,
                new Listener<String>() {
                    @Override
                    public void onResponse(String response) {


                        try {
                            jsonObject = new JSONObject(response);

                            Log.d("response2....", "" + response);

                            if (jsonObject.getString("message").equals("orderdetail added successfully")) {
                                Toast.makeText(getContext(), "orderdetail added successfully", Toast.LENGTH_SHORT).show();
                                Log.d("response2....", "" + jsonObject.getString("message"));

                            } else if (jsonObject.getString("message").equals("Some error occurred please try again")) {
                                Toast.makeText(getContext(), "2", Toast.LENGTH_SHORT).show();
                            } else if (jsonObject.getString("message").equals("It seems orderdetail is already Exist")) {
                                Toast.makeText(getContext(), "3", Toast.LENGTH_SHORT).show();
                            } else if (jsonObject.getString("message").equals("Required fields are missing")) {
                                Toast.makeText(getContext(), "4", Toast.LENGTH_SHORT).show();
                            } else if (jsonObject.getString("message").equals("Invalid Request")) {
                                Toast.makeText(getContext(), "5", Toast.LENGTH_SHORT).show();
                            }


                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                },
                new ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {

                        Toast.makeText(getContext(), error.getMessage(), Toast.LENGTH_LONG).show();
                    }
                }) {


            @Override
            protected Map<String, String> getParams() {
                Map<String, String> params = new HashMap<>();
                params.put("invoice_id", invoice_id);
                params.put("product_name", pname);
                params.put("quantity", quantityname);
                params.put("price", pricename);
                params.put("discount", discountname);
                params.put("totalamount", String.valueOf(Productwisetotalname));
                return params;
            }
        };


        RequestHandler.getInstance(getContext()).addToRequestQueue(stringRequest);

    }

`