Question

我有一个数据表，从json.php文件中获取数据。它工作正常，但现在我想要一个具有各种选项的选择框（例如：＆＃39;今年，去年，开单，关闭账单，逾期等），选择发送ajax后变量data: {cmd: ($('#selected').val()}到json.php（将优化所请求的记录）和ajax.table.reload();以便显示新记录。

这是我到目前为止所尝试的：

<select class="form-control" name="selection" id="selection">
  <option value="thisMon">This Month</option>
  <option value="lasMon">Last Month</option>
  <option value="thisYr">This Year</option>
  <option value="lasYr">Last Year</option>
  <option value="open">Open</option>
  <option value="closed">Closed</option>
</select>

 <script>
  $(document).ready(function() {
    $('#selection').change(function() {
      var table = $('#datatable-buttons').DataTable({
        "ajax": {
            url: "scripts/json-expenses.php",
            dataSrc: "",
            data: { length: $('#selection').val() }
        },
        dom: "Bfrip",
        "columns": [
          { data: "id", visible: false, searchable: false },
          { data: "expense_date"},
          { data: "supplier",
            render: function(data, type, row){
              return '<a href="/numbers/edit-expense.php?id='+ row.id +'">'+ data +'</a>'; 
            }
          },
          { data: "amount" },
          { data: "gst" }, 
          { data: "status",
            render: function(data, type, row) {
              if (row.due_date !== null) {
                var dueDateArr = row.due_date.split("-");
                var dueDate = new Date(dueDateArr[0], dueDateArr[1]-1, dueDateArr[2]);
                var todayDate = new Date();
              }

              if (data == "Not Paid" && todayDate > dueDate) {
               return '<label class="label label-danger">Overdue</label>';
              }

              if (data === "Paid") {
                return '<label class="label label-success">'+ data +'</label>';
              }
              else if (data === "Not Paid") {
                return '<label class="label label-default">'+ data +'</label>';
              }
            }
          },
          { data: "due_date",
            defaultContent: ""
          }
        ],
        "order": [ 1, 'desc' ],
        paging: false,
        fixedHeader: true
      });
    });
    $('#selection').change(function(){
      table.ajax.reload();
    });
  });
</script>

编辑：

它只能运行一次，并在ReferenceError: Can't find variable: table的行上提供错误table.ajax.reload(); 下次我选择其他选项时，数据表会给出错误：Cannot reinitialise DataTable.

Answer 1

尝试更改此功能

$(document).ready(function(){
    $('#datatable-buttons').DataTable({
            "ajax": {
                url: "scripts/json-expenses.php",
                dataSrc: "",
                data: { length: $('#selection').val() }
            },
            dom: "Bfrip",
            "columns": [
              { data: "id", visible: false, searchable: false },
              { data: "expense_date"},
              { data: "supplier",
                render: function(data, type, row){
                  return '<a href="/numbers/edit-expense.php?id='+ row.id +'">'+ data +'</a>'; 
                }
              },
              { data: "amount" },
              { data: "gst" }, 
              { data: "status",
                render: function(data, type, row) {
                  if (row.due_date !== null) {
                    var dueDateArr = row.due_date.split("-");
                    var dueDate = new Date(dueDateArr[0], dueDateArr[1]-1, dueDateArr[2]);
                    var todayDate = new Date();
                  }

                  if (data == "Not Paid" && todayDate > dueDate) {
                   return '<label class="label label-danger">Overdue</label>';
                  }

                  if (data === "Paid") {
                    return '<label class="label label-success">'+ data +'</label>';
                  }
                  else if (data === "Not Paid") {
                    return '<label class="label label-default">'+ data +'</label>';
                  }
                }
              },
              { data: "due_date",
                defaultContent: ""
              }
            ],
            "order": [ 1, 'desc' ],
            paging: false,
            fixedHeader: true
          });
    $('#selection').change(function(){
    $('#datatable-buttons').dataTable().fnDestroy();
    var table = $('#datatable-buttons').DataTable({
            "ajax": {
                url: "scripts/json-expenses.php",
                dataSrc: "",
                data: { length: $('#selection').val() }
            },
            dom: "Bfrip",
            "columns": [
              { data: "id", visible: false, searchable: false },
              { data: "expense_date"},
              { data: "supplier",
                render: function(data, type, row){
                  return '<a href="/numbers/edit-expense.php?id='+ row.id +'">'+ data +'</a>'; 
                }
              },
              { data: "amount" },
              { data: "gst" }, 
              { data: "status",
                render: function(data, type, row) {
                  if (row.due_date !== null) {
                    var dueDateArr = row.due_date.split("-");
                    var dueDate = new Date(dueDateArr[0], dueDateArr[1]-1, dueDateArr[2]);
                    var todayDate = new Date();
                  }

                  if (data == "Not Paid" && todayDate > dueDate) {
                   return '<label class="label label-danger">Overdue</label>';
                  }

                  if (data === "Paid") {
                    return '<label class="label label-success">'+ data +'</label>';
                  }
                  else if (data === "Not Paid") {
                    return '<label class="label label-default">'+ data +'</label>';
                  }
                }
              },
              { data: "due_date",
                defaultContent: ""
              }
            ],
            "order": [ 1, 'desc' ],
            paging: false,
            fixedHeader: true
          });
    });
)};

Answer 2

在数据表中设置"destroy": true

Answer 3

如果在函数中定义table，它将仅在函数和子函数中定义。

在您的代码中，您在table中定义了$('#selection').change(function() {，并且您将在其他$('#selection').change(function() {中使用它，因此不会在第二个函数中定义它。

还有一个错误，因为您使用$('#selection').change(function() {两次并尝试多次添加数据表。

$(document).ready(function() {
     //no need for change, just load table on document ready
      var table = $('#datatable-buttons').DataTable({
        "ajax": {
            url: "scripts/json-expenses.php",
            dataSrc: "",
            data: { length: $('#selection').val() }
        },
        dom: "Bfrip",
        "columns": [
          { data: "id", visible: false, searchable: false },
          { data: "expense_date"},
          { data: "supplier",
            render: function(data, type, row){
              return '<a href="/numbers/edit-expense.php?id='+ row.id +'">'+ data +'</a>'; 
            }
          },
          { data: "amount" },
          { data: "gst" }, 
          { data: "status",
            render: function(data, type, row) {
              if (row.due_date !== null) {
                var dueDateArr = row.due_date.split("-");
                var dueDate = new Date(dueDateArr[0], dueDateArr[1]-1, dueDateArr[2]);
                var todayDate = new Date();
              }

              if (data == "Not Paid" && todayDate > dueDate) {
               return '<label class="label label-danger">Overdue</label>';
              }

              if (data === "Paid") {
                return '<label class="label label-success">'+ data +'</label>';
              }
              else if (data === "Not Paid") {
                return '<label class="label label-default">'+ data +'</label>';
              }
            }
          },
          { data: "due_date",
            defaultContent: ""
          }
        ],
        "order": [ 1, 'desc' ],
        paging: false,
        fixedHeader: true
      });
    //on change reload table
    $('#selection').change(function(){
      table.ajax.reload();
    });
  });

数据表ajax post - 从选择框发送帖子数据

3 个答案: