I want to display my POS in the summary fields of my data object within the grid field. Here’s what I currently have:
private static $summary_fields = array(
'Identifier' => 'Total',
'Description' => 'Details',
);
However, I’ve noticed that the $Pos variable is accessible only in the SilverStripe template and isn’t usable in the summary fields.
hey! Maybe u can use a custom method in your model to calculate or format your POS and then return it as a value in summary fields. that way u can get the data without needing it directly in the summary fields. Hope it helps!
You could experiment with DataExtension to enhance your data object. By creating a custom getter in this extension, you can calculate the POS or interpret it accordingly. After defining this new method, you can include it in the summary fields. This approach allows you to separate the logic from the view, maintaining a clean structure in your codebase. Furthermore, it provides flexibility if more complex processing or additional fields are required in the future.
why not try using a decorator pattern to add the POS data formatting? it could give you access in both the template and summary_fields without too much hassle. just wrap your data object and modify as needed, pretty neat way to handle such issues 
Have you considered using an ORM or a hook for data preparation before it reaches the template? Would love to hear about any specific challenges or errors you’re facing with integrating POS! It’s always interesting to see different methods used in SilverStripe. What’s your larger goal with this integration?
One effective solution you could explore is leveraging the use of SilverStripe’s computed fields. You can define a method within your data object class that calculates the value of your POS and returns it. Then, you can reference this method in your summary fields array. This approach allows you to dynamically compute and display values within your admin grid fields efficiently. It provides a way to harness existing data and logic within your model, ensuring seamless integration and enhancing maintainability.