开发 JavaScript 以基于标准阻止分析

每当用户尝试运行分析时，Oracle Analytics 都会调用函数 validateAnalysisCriteria。您可以定制 validateAnalysisCriteria，以便基于您自己的特定标准来验证和阻止查询。如果此函数返回 true，则查询可以运行。如果此函数返回 false 或显示一条消息，则系统会阻止查询。

例如，以下是一个名为 myblocking.js 的 JavaScript 程序的示例代码。

// This is a blocking function. It ensures that users select what 
// the designer wants them to.
function validateAnalysisCriteria(analysisXml)
{
   // Create the helper object
   var tValidator = new CriteriaValidator(analysisXml);
   // Validation Logic
   if (tValidator.getSubjectArea() != "Sample Sales")
      return "Try Sample Sales?";
   if (!tValidator.dependentColumnExists("Markets","Region","Markets","District"))
   {
      // If validation script notifies user, then return false
      alert("Region and District are well suited, do you think?");
      return false;
   }
   if (!tValidator.dependentColumnExists("Sales Measures","","Periods","Year"))
   return "You selected a measure so pick Year!";
   if (!tValidator.filterExists("Sales Measures","Dollars"))
   return "Maybe filter on Dollars?";
   if (!tValidator.dependentFilterExists("Markets","Market","Markets"))
   return "Since you are showing specific Markets, filter the markets.";
   var n = tValidator.filterCount("Markets","Region");
   if ((n <= 0) || (n > 3))
      return "Select 3 or fewer specific Regions";
   return true;
}

如果此函数返回的不是 false，则系统会认为标准有效并运行分析。此函数还可用于验证针对预览和保存操作的标准。