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Difference between getTableName and class name

What is getTableName in ServiceNow?

In ServiceNow, the getTableName() function is a server-side scripting method used within scripts such as Business Rules, Client Scripts, Script Includes, and other server-side scripts. It is used to retrieve the name of the table associated with a particular GlideRecord object.

Here’s a brief overview of the getTableName() function:

  • Purpose: The getTableName() function is primarily used to dynamically retrieve the name of the table associated with a GlideRecord object. This can be useful when you need to perform operations or validations based on the current table context.
  • Syntax: The syntax for using getTableName() is simple. You call it on a GlideRecord object like this:javascriptCopy codevar tableName = current.getTableName(); Here, current is a GlideRecord object representing the current record in the script execution context.
  • Usage: Typical use cases for getTableName() include:
    • Performing conditional logic or validations based on the current table.
    • Dynamically constructing queries or references to related records.
    • Building generic or reusable scripts that can work with different tables.
// Get the name of the table associated with the current record 
var tableName = current.getTableName(); // Perform logic based on the table name if (tableName == 'incident') { // Do something specific to the incident table } 
else if (tableName == 'change_request') { // Do something specific to the change request table } 
else { // Handle other tables or perform generic logic }

Using getTableName() It allows scripts to be more dynamic and adaptable to table structure or context changes, as it retrieves the table name at runtime. This function is key to server-side scripting in ServiceNow, which interacts with data and controls behaviour based on table context.

What is the class name in Servicenow?

In ServiceNow, “class name” typically refers to the name of a JavaScript class defined within the platform’s scripting environment. Classes in ServiceNow encapsulate data and behavior, facilitating modular and object-oriented programming practices.

Here’s an overview of class names in ServiceNow:

  1. JavaScript Classes: In ServiceNow, JavaScript classes are used to define reusable components with properties and methods. Classes follow the ECMAScript 6 (ES6) standard syntax for defining classes.
  2. Usage: Class names are used to instantiate objects of a particular class or to extend existing classes to create sub-classes. They are typically referenced within scripts such as Business Rules, Client Scripts, Script Includes, and other server-side and client-side scripts.
  3. Examples: Here are some examples of class names in ServiceNow:
    • GlideRecord: Represents a record in a table.
    • GlideDateTime: Represents a date and time value.
    • GlideAggregate: Provides methods for performing aggregate operations on records.
    • GlideUser: Represents a user in the system.
  4. Custom Classes: ServiceNow allows developers to define custom classes to encapsulate business logic, reusable functionality, or integrations with external systems. Custom classes are defined using the class keyword followed by the class name and class body.
  5. Instantiation: To instantiate an object of a class, you use the new keyword followed by the class name and any constructor parameters required by the class.

What is the difference between getTableName and class name in ServiceNow?

Here’s a comparison between getTableName and class name in ServiceNow presented in a table format:

FeaturegetTableNameClass Name
PurposeRetrieves the name of the table associated with a GlideRecord object.Represents a JavaScript class defined within the ServiceNow platform’s scripting environment.
UsageCalled on a GlideRecord object to dynamically retrieve the table name.Used to instantiate objects or extend existing classes to encapsulate data and behavior.
ScopeSpecifically used within server-side scripts such as Business Rules, Client Scripts, and Script Includes.Utilized in both server-side and client-side scripts to define and work with custom or predefined classes.
FunctionalityProvides a way to dynamically determine the table context in which a script is executing.Facilitates object-oriented programming practices by encapsulating data and behavior within reusable components.
Examplejavascript var tableName = current.getTableName();javascript class CustomClass { constructor(name) { this.name = name; } greet() { gs.info('Hello, ' + this.name + '!'); } } var obj = new CustomClass('John'); obj.greet();
ContextTypically used within scripts that interact with ServiceNow database tables and records.Used in a wide range of scripting scenarios, including business logic, data manipulation, and integration with external systems.

This table provides a comparison between getTableName and class name in ServiceNow, highlighting their purposes, usage, scope, functionality, examples, and context within scripting environments.

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