Will the prefilter value be calculated by the code if it is blocked from changing?
Of course!
How do I set different values for the prefilter field depending on the role or user?
Use the fast variables $#nr and $#nu.
Is the prefilter a strong access blocker or not?
The prefilter is a strong block.
But if the user from whom access is being made can edit it (regardless of whether it is hidden or not) — then they can enter any value into it!
When would the "Execute code only when adding" option be better to use?
If the prefilter field is editable and calculated by code simultaneously, a hand will appear when manually changed — indicating that the value differs from the calculated one.
Therefore, in most cases for editable prefilter fields with codes, execute only on add or showhand: false is used.
How does editing access effect the linkToTable?
If the prefilter field to which the value is passed by the filter parameter of the linkToTable function is not editable by the user, the data will not be transmitted!
If you need to make the field inaccessible to the user, you need to set visibility parameters so that the user cannot see it, but leave the field editable!
Why is it impossible to pass a large list using linkToTable?
The fact is that filter and field in linkToTable are passed in the address bar in an encrypted form using a session key.
The address bar has a limitation on the maximum length. Therefore, if you need to pass a large amount of data, you need to pass not the data itself, but short elements for their calculation in a field that will not be linked to anything.
Then, in a hidden prefilter field, calculate the necessary values based on this data.