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This code snippet is written in JavaScript for an Oracle APEX application and is used to validate a specific field (P2_ENAME) and manage user interactions with other fields. Here's a detailed explanation of each part:
empename Function:
function empename() { var ename = $v('P2_ENAME'); // Get the value of the page item P2_ENAME using the $v function. if (!ename) { // Check if the value of P2_ENAME is empty, null, or undefined. // Show an alert message using apex.message.alert with a custom title and warning icon. apex.message.alert('Please enter a value for Ename before proceeding.', { title: "Required Field", icon: "warning" }); return false; // Return false to indicate validation failure. } return true; // Return true to indicate validation success. }
Purpose: This function checks if the P2_ENAME field has a value. If it's empty or not filled, an alert message is displayed to the user, asking them to enter a value for Ename before proceeding. Details: $v('P2_ENAME'): This is an Oracle APEX function that retrieves the current value of the page item P2_ENAME. apex.message.alert: This function shows an alert dialog with a custom message, title, and icon. It is used to inform the user that they need to fill in the P2_ENAME field. Return Value: The function returns false if the field is not filled, preventing further actions. It returns true if the field is filled, allowing other actions to proceed.
Summary: This script enforces a validation rule on an Oracle APEX page, ensuring that a required field (P2_ENAME) is filled before allowing interaction with other fields. The use of event listeners and alert messages helps guide the user in filling out the form correctly.