To update items only if there is a change in the record, you can use a combination of the Patch function and a condition to check for changes.
Here's how you can achieve this:
1. First, identify the condition that indicates whether a record has been modified or not. This could be a flag in your data source that is set to true when the record is updated.
2. In your Power Apps app, use a ForAll function to loop through the gallery items.
3. Inside the ForAll function, use an If statement to check if the record has been modified (based on the condition you identified earlier).
4. If the record has been modified, use the Patch function to update the item.
Here's an example of how you can implement this:
Let's assume your data source is a SharePoint list, and it has a field called "Modified" that is set to true when a record is updated.
ForAll(
GalleryName.AllItems,
If(
ThisItem.Modified = true, // Replace 'Modified' with the actual flag indicating changes
Patch(
SharePointListName,
LookUp(SharePointListName, ID = ThisItem.ID), // Find the record to update by matching the ID
{
Field1: ThisItem.Field1, // Update Field1 with the value from the gallery item
Field2: ThisItem.Field2, // Update Field2 with the value from the gallery item
// Add other fields as needed
}
)
)
)
In this example, the ForAll function loops through all the gallery items, and the If statement checks if the "Modified" field is true for each item. If it is true, the Patch function updates the corresponding record in the SharePoint list with the values from the gallery item.
