How to save a table from Datatables to a database in Django? - django

Question

I'm using Datatables to display tables in Django on the server side. After searching for a phrase, I have a button ready to save the current table after filtering to Excel. I would like the second button to create a new table in the database and save the same table to it as for Excel.
I don't know how I can send AJAX data to Django and read it in views in such a way that I can query the database.
javascript:
$(document).ready(function () {
function newexportaction(e, dt, button, config) {
var self = this;
var oldStart = dt.settings()[0]._iDisplayStart;
dt.one('preXhr', function (e, s, data) {
data.start = 0;
data.length = 2147483647;
dt.one('preDraw', function (e, settings) {
// Call the original action function
if (button[0].className.indexOf('buttons-excel') >= 0) {
$.fn.dataTable.ext.buttons.excelHtml5.available(dt, config) ?
$.fn.dataTable.ext.buttons.excelHtml5.action.call(self, e, dt, button, config) :
$.fn.dataTable.ext.buttons.excelFlash.action.call(self, e, dt, button, config);
}
dt.one('preXhr', function (e, s, data) {
settings._iDisplayStart = oldStart;
data.start = oldStart;
});
});
});
dt.ajax.reload();
}
$("#tb").DataTable({
"lengthChange": true,
"paging": true,
"searching": true,
"oLanguage": {
"sSearch": "Szukaj:",
},
"language": {
"processing": "Przetwarzanie",
"lengthMenu": "Pokaż _MENU_ elementów",
"info": "Wyświetlono od _START_ do _END_ z _TOTAL_ elementów",
"zeroRecords": "Nie znaleziono pasujących elementów",
"paginate": {
"first": "Pierwsza",
"last": "Ostatnia",
"next": "Kolejna",
"previous": "Poprzednia"
},
"emptyTable": "Brak danych do wyświetlenia",
},
"processing": true,
"serverSide": true,
buttons: [
{
extend: 'excel',
titleAttr: 'Excel',
title: '',
action: newexportaction
},
],
dom: 'B<"clear">lfrtip',
// "destroy": true,
"pageLength": 15,
"ordering": false,
"ajax": {
"url": "paging2/",
"type": "get"
},
});
});
views.py:
def paging2(request):
draw = int (request.GET.get ('draw')) # record the number of operations
start = int (request.GET.get ('start')) # start position
length = int (request.GET.get ('length')) # length of each page
search_key = request.GET.get ('search[value]') # search keyword
order_column = request.GET.get ('order [0] [column]') # sort field index
order_column = request.GET.get ('order [0] [dir]') #Ordering rule: ase / desc
# sql query all data, then do paging, the speed is slow
# if search_key:
# result = query(search_key)
# else:
# result = select_all()
# data = result[start:start+length]
# count = len(result)
# sql for paging, fast
if search_key:
sql_search = "SELECT NAZWA,TEL,NIP,Adres,WWW, EMAIL, Branza, NAZWA_SCRAPERA FROM gus_all t1 WHERE NOT EXISTS (SELECT * FROM matka_new t2 WHERE t2.NIP = t1.NIP) AND LENGTH(TEL) = 9 AND `STATUS` = 'AKTYWNY' AND NAZWA_SCRAPERA is NOT NULL AND Branza like '%%%s%%'" % search_key
sql_search_len = "SELECT COUNT(*) FROM gus_all t1 WHERE NOT EXISTS (SELECT * FROM matka_new t2 WHERE t2.NIP = t1.NIP) AND LENGTH(TEL) = 9 AND `STATUS` = 'AKTYWNY' AND NAZWA_SCRAPERA is NOT NULL AND Branza like '%%%s%%'"% search_key
result, count = query(sql_search, sql_search_len)
data = result[start:start + length]
else:
sql = """
SELECT NAZWA,TEL,NIP,Adres,WWW, EMAIL, Branza, NAZWA_SCRAPERA FROM gus_all t1 WHERE NOT EXISTS (SELECT * FROM matka_new t2 WHERE t2.NIP = t1.NIP) AND LENGTH(TEL) = 9 AND `STATUS` = 'AKTYWNY' AND NAZWA_SCRAPERA is NOT NULL
LIMIT %s OFFSET %s
"""
data = select_by_page(length, start, sql)
# data = select_by_page(start, start + length)
sql_len = "SELECT COUNT(*) FROM gus_all t1 WHERE NOT EXISTS (SELECT * FROM matka_new t2 WHERE t2.NIP = t1.NIP) AND LENGTH(TEL) = 9 AND `STATUS` = 'AKTYWNY' AND NAZWA_SCRAPERA is NOT NULL"
count = all_count(sql_len)
dic = {
'draw': draw,
'recordsTotal': count,
'recordsFiltered': count,
'data': data,
}
return HttpResponse(json.dumps(dic), content_type='application/json')