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DayBackForFileMaker: OnlySeeMyEvents

How Do I Let a User See Only Their Own Records?

Overview.

You can easily restrict the events a user is able to see. There are two different approaches to doing this, using Filters and using Access Privileges.

Using Filters is the simplest: you can create a new filter for the event's "owner" and then pre-filter the calendar so only events for that owner show up. If this is all you do, however, users will be able to reset the filter to see other events, which may be a good thing.

You can also hard-code a filter into the calendar by intercepting the find request DayBack makes when finding events to display: think of this as a filter that users can't change.

Both of these filter methods use the calendar's interface to restrict what shows up: users could still navigate to another of your layouts and search for events, possibly finding events that belong to other users. If that is not acceptable you'd use FileMaker's built in Access Privileges to restrict what a user can see. This "Access Privileges technique" uses features built into FileMaker and is not specific to DayBack.

Using Filters

Pre-Filtering.

The simplest way to restrict what shows up in the calendar is to pre-filter the calendar when users launch it. You can learn more about pre-filtering here: Filters.

Hard-Coding a hidden filter.

Another approach is to intercept the find request the calendar performs when looking for records. This is what we think of as a hidden filter. To do this edit the script "Event Find" and locate the comment "Hard code any hidden filters here" toward the middle of the script. The following If () statements show you how to add find criteria specific to each of your sources. Set fields here following the If or Else If branch for your source, reading the script comments for guidance.
Remember, you probably only want this to run for some users, so either include that "userness" in your set field steps or use Case() statements to make a different find request for each account or privilege set.

Using Access Privileges

Overview.

This is very easily done; you'll use FileMaker's built-in Access Privileges to create rules as to which records a logged in user can see, which they can edit etc. You can restrict which layouts they can see and even which specific fields they have access to.

If you haven't worked with FileMaker's Access Privileges before, take a moment and read the overview in FileMaker's built-in help, check out Contents > Protecting databases > Creating and editing privilege sets > Editing record access privileges.

For more information about limiting which records a user can see, continue to the "To edit record access privileges for individual tables" section: you're interested in the "Limited" option under number 4.

Tips & Tricks.

The only tricky part here is finding some attribute of the user's login to tie that login to a record in the calendar's events table. The items you have at your disposal are Get ( AccountName ) and Get ( AccountPrivilegeSetName ). The privilege set name is probably going to be used for general things like 'administrator' or 'sales rep' and may be used in FileMaker's Access Privileges to limit what a user can see or edit. You may, for example, craft access privileges so that sales reps can't access the "Under the Hood" layout in DayBack.

So you'll probably be using Get ( AccountName ) in your access privilege calculations to compare a logged in user with the user linked to an appointment. There are two basic approaches here:

1. You can make the user' Account Name match a field already in the database. So you could make sure all your accounts are created with the Account Names being real first and last names of your users. Account names would be things like 'Bill Smith'. If you did that, an access privilege calc that would let the logged in user only see their appointments would look like this:
Not isempty ( FilterValues ( List ( SampleEvents::UserNameFirstLastCalc ) ; Get ( AccountName ) ) )
Make sure this calc is set to evaluate from the context of the same table occurrence used for your Source No 1 layout. So there are a couple things to note about this calc. The first is that it just returns a 1 or 0; a 1 if the Account Name is one of the names of the users linked to the appointment, a 0 if it is not. That is how all your access privileges calcs should be written: to return a 1 (ie. be true) if the user can see, edit, etc. the record. The second thing to note is that we don't use the = sign. This is because an appointment can have more than one user, so its user will never be equal to any one user. Instead, we use FilterValues to see if the Account Name is a member of the users on the appointment.
2. The second approach is to create your own field in a users table to match the account name; you'd essentially be recording the account name in FileMaker. Do not, of course, record the user's password in FileMaker as that would not be very secure.
Note that if your username is not indexed in the events table this calc can really slow the solution down as FileMaker looks at some related information for each event it is trying to display.
Now, of course, you may want to have some users that can see everyone's appointments: you don't have to mess with the calc above to do this, simply assign these 'power users' to a different privilege set that doesn't limit the appointments they can view at all.
This second approach is already built into SeedCode Complete.
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Page last modified on September 26, 2018, at 11:01 PM