Show if group has access to certain forms - php

Question

I'm trying to understand how to write a query to distinguish if a user has access to certain form or not. I know what I am asking here looks easy but when I tried to implement it, it was whole different thing.
Maybe I am doing it wrong.
Before starting I want to mention the two tables names in start:
sys_forms,
sys_forms_in_groups
Also I am putting a SQL Fiddle link at the end.
Here is what I am trying to do.
If you can see the picture, on top dropdown box (it's a select2 dropdown), user selects the group and it will return GroupID, on the base of which I want to populated the below datatable. (DataTable is just showing groups, it's a dummy, but it will show forms, will fix it if problem is solved)
Now here the problem arise:
I want datatables to show all the forms available in sys_forms table in datatables but in actions columns of datatables only those checkboxes/switches should show granted which are available in the selected group(Group can be selected for select2 dropdown as said before).
GroupID is the column of other table sys_forms_in_groups.
All I want is that all the forms should show in the datatables no matter what group I choose, but Actions column in table should display Granted if the group has access to that particular form.
forms_in_groups is for showing if group has access to that certain form or not. For example:
FormID GroupID
------------------------------
1 1
2 1
1 2
FormID 1 is available to both groupID 1 and 2, on other hand FormID 2 is avaialable only to GroupID 1.
Here is my SQL Fiddle.
Edit
The SQL Fiddle is not working, so putting screenshots here.
Table : sys_forms
Table : sys_forms_in_groups
I have tried this query, but it only returns forms for the selected group, where I want that all forms should show but they must show granted in Actions Columns on checkboxes/switchButtons
SELECT * FROM (`sys_forms`) INNER JOIN `sys_forms_in_groups`
ON `sys_forms_in_groups`.`FormID` = `sys_forms`.`FormID` WHERE `GroupID` = 1;

Answer 1

I think you're, incorrectly, trying to offload the issue onto MySQL.
It's not MySQL's job to render the forms and show whether a selected group has access to a specific form. That will fall onto your rendering of the page; using Select2 in this case.
You just want to retrieve all forms, then show whether the selected group has access to a specific form. That comes down to some Javascript that makes that check for you and displays it properly.
If you want to return all forms, the query would be:
SELECT * FROM (`sys_forms`) INNER JOIN `sys_forms_in_groups`
ON `sys_forms_in_groups`.`FormID` = `sys_forms`.`FormID`;
If you only want the forms that group 1 has access to, the query would be just as you have it:
SELECT * FROM (`sys_forms`) INNER JOIN `sys_forms_in_groups`
ON `sys_forms_in_groups`.`FormID` = `sys_forms`.`FormID` WHERE `GroupID` = 1;
I didn't do a lot of digging into Select2, so I can't really help you in that aspect.

Answer 2

What I can see from your database schema, an inner join is the correct choice here based on the data you are looking for. The only issue I can see is in the WHERE clause. Seems that it may try to look for GroupID in the sys_forms table, so try specifying.
SELECT * FROM (`sys_forms`) INNER JOIN `sys_forms_in_groups`
ON `sys_forms_in_groups`.`FormID` = `sys_forms`.`FormID` WHERE
`sys_forms_in_groups`.`GroupID` = 1;

Answer 3

Finally Problem Solved and working perfectly fine, but after solving that problem i found out there is an other issue i didnt think of, but thats another matter. xD.
However, It was a little rough way to solve but i got what i wanted.
Here is how i did it,
I first needed to update my select query to,
SELECT f.FormID
, f.FormName
, f.FormCIPath
, MAX(g.IsMenuLink) AS IsMenuLink
, GROUP_CONCAT(DISTINCT g.GroupID ORDER BY g.GroupID) AS GroupIDs
FROM `sys_forms` f
JOIN `sys_forms_in_groups` g
ON g.FormID = f.FormID
AND g.GroupID IN (1,2)
GROUP BY f.formID
Here you can see it will return all the forms which belongs to group 1 and group 2 but in a way that 1 and 2 will be in same column separated by comma.
Here how it shows now.
I am not a very complex query master so i am very much grateful to stackoverflow community to help me with the query. As i wanted to join both results to show in comma separated value.
After the MysQL the jquery work was not much difficult, i only sent the group ID for which i wanted the result to show in table. and there i got this result in return where i separate the GroupIDs with javascript split function and i get my groups.
Thankyou again everyone.