如何有条件地显示TableTools按钮

Question

我使用jQuery DataTables和TableTools扩展在表标题中显示按钮。但是，在满足某些条件时，是否有显示按钮的选项？

我的表初始化代码如下所示：

projectsTable = $('#projects_table').DataTable({
    "dom": '<"cleaner">lf<"cleaner">T<"cleaner"><"cleaner">rtip',
    "stateSave": true,        
    "data":tableData,
    "bSortCellsTop": true,
    "responsive": true,
    "autoWidth": false,
    "tableTools":{
        "aButtons": [
            {
                "sExtends": "text",
                "sButtonText": "New project",
                "fnClick": function (mButton, oConfig, oFlash){
                    addProjectDialog();
                }
            },{
                "sExtends": "text",
                "sButtonText": "Reset all filters",
                "fnClick": function (mButton, oConfig, oFlash){
                    resetAllFilters();
                }
            }
        ]
    }
});

我想显示“新项目”按钮，只有当用户有正确的权限。有可能吗？

Answer 1

由于aButtons是一个数组，所以可以如下所示解决这个问题：

var canUserCreateProjects = true;

// DataTables TableTools buttons options
var aButtonsData = [];

// If user can create projects
if(canUserCreateProjects){
   aButtonsData.push({
      "sExtends": "text",
      "sButtonText": "New project",
      "fnClick": function (mButton, oConfig, oFlash){
         addProjectDialog();
      }
   });
}

aButtonsData.push({
   "sExtends": "text",
   "sButtonText": "Reset all filters",
   "fnClick": function (mButton, oConfig, oFlash){
      resetAllFilters();
   }
});

// Initialize DataTable
var projectsTable = $('#projects_table').DataTable({
    "dom": '<"cleaner">lf<"cleaner">T<"cleaner"><"cleaner">rtip',
    "stateSave": true,        
    "data":tableData,
    "bSortCellsTop": true,
    "responsive": true,
    "autoWidth": false,
    "tableTools": {
        "aButtons": aButtonsData
   }
});