How to check if somebody else editing same entity
Lets say in admin panel one user editing any entity lets say product is there a way if another user who also if try to edit the same entity/product info would able to get a notification or something that "somebody else already editing the same so ask him to wait etc".
mysql concurrency
asked Nov 25 '18 at 14:55
nirmeshnirmesh
536
add a comment |
Lets say in admin panel one user editing any entity lets say product is there a way if another user who also if try to edit the same entity/product info would able to get a notification or something that "somebody else already editing the same so ask him to wait etc".
mysql concurrency
asked Nov 25 '18 at 14:55
nirmeshnirmesh
536
If you use InnoDB you can use SELECT ... FOR UPDATE
– Raymond Nijland
Nov 25 '18 at 16:37
add a comment |
Lets say in admin panel one user editing any entity lets say product is there a way if another user who also if try to edit the same entity/product info would able to get a notification or something that "somebody else already editing the same so ask him to wait etc".
mysql concurrency
asked Nov 25 '18 at 14:55
nirmeshnirmesh
536
Lets say in admin panel one user editing any entity lets say product is there a way if another user who also if try to edit the same entity/product info would able to get a notification or something that "somebody else already editing the same so ask him to wait etc".
mysql concurrency
mysql concurrency
asked Nov 25 '18 at 14:55
nirmeshnirmesh
536
asked Nov 25 '18 at 14:55
nirmeshnirmesh
536
asked Nov 25 '18 at 14:55
nirmeshnirmesh
536
asked Nov 25 '18 at 14:55
nirmeshnirmesh
536
asked Nov 25 '18 at 14:55
nirmeshnirmesh
536
536
If you use InnoDB you can use SELECT ... FOR UPDATE
– Raymond Nijland
Nov 25 '18 at 16:37
add a comment |
If you use InnoDB you can use SELECT ... FOR UPDATE
– Raymond Nijland
Nov 25 '18 at 16:37
If you use InnoDB you can use SELECT ... FOR UPDATE
– Raymond Nijland
Nov 25 '18 at 16:37
If you use InnoDB you can use SELECT ... FOR UPDATE
– Raymond Nijland
Nov 25 '18 at 16:37
add a comment |
1 Answer
1
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oldest
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You need a way to mark the entity as busy.
A good way: add two columns to the entity's table.
busy_user INT either a user id or zero
busy_until TIMESTAMP the time when the busy setting expires, in case the user goes away
Then when a user tries to edit an item you do this:
- if
busy_useris nonzero and not the current user, andbusy_until > NOW()reject the request to edit; the item is busy. - Set
busy_userto the current user's id. Set busy_until toNOW() + INTERVAL 5 MINUTE
- Do the edit as needed.
When a user finishes editing, set busy_user to zero.
answered Nov 25 '18 at 15:14
O. JonesO. Jones
59.5k974106
In thoery race conditations can still happen with this method
– Raymond Nijland
Nov 25 '18 at 16:28
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You need a way to mark the entity as busy.
A good way: add two columns to the entity's table.
busy_user INT either a user id or zero
busy_until TIMESTAMP the time when the busy setting expires, in case the user goes away
Then when a user tries to edit an item you do this:
- if
busy_useris nonzero and not the current user, andbusy_until > NOW()reject the request to edit; the item is busy. - Set
busy_userto the current user's id. Set busy_until toNOW() + INTERVAL 5 MINUTE
- Do the edit as needed.
When a user finishes editing, set busy_user to zero.
answered Nov 25 '18 at 15:14
O. JonesO. Jones
59.5k974106
In thoery race conditations can still happen with this method
– Raymond Nijland
Nov 25 '18 at 16:28
add a comment |
You need a way to mark the entity as busy.
A good way: add two columns to the entity's table.
busy_user INT either a user id or zero
busy_until TIMESTAMP the time when the busy setting expires, in case the user goes away
Then when a user tries to edit an item you do this:
- if
busy_useris nonzero and not the current user, andbusy_until > NOW()reject the request to edit; the item is busy. - Set
busy_userto the current user's id. Set busy_until toNOW() + INTERVAL 5 MINUTE
- Do the edit as needed.
When a user finishes editing, set busy_user to zero.
answered Nov 25 '18 at 15:14
O. JonesO. Jones
59.5k974106
In thoery race conditations can still happen with this method
– Raymond Nijland
Nov 25 '18 at 16:28
add a comment |
You need a way to mark the entity as busy.
A good way: add two columns to the entity's table.
busy_user INT either a user id or zero
busy_until TIMESTAMP the time when the busy setting expires, in case the user goes away
Then when a user tries to edit an item you do this:
- if
busy_useris nonzero and not the current user, andbusy_until > NOW()reject the request to edit; the item is busy. - Set
busy_userto the current user's id. Set busy_until toNOW() + INTERVAL 5 MINUTE
- Do the edit as needed.
When a user finishes editing, set busy_user to zero.
answered Nov 25 '18 at 15:14
O. JonesO. Jones
59.5k974106
You need a way to mark the entity as busy.
A good way: add two columns to the entity's table.
busy_user INT either a user id or zero
busy_until TIMESTAMP the time when the busy setting expires, in case the user goes away
Then when a user tries to edit an item you do this:
- if
busy_useris nonzero and not the current user, andbusy_until > NOW()reject the request to edit; the item is busy. - Set
busy_userto the current user's id. Set busy_until toNOW() + INTERVAL 5 MINUTE
- Do the edit as needed.
When a user finishes editing, set busy_user to zero.
answered Nov 25 '18 at 15:14
O. JonesO. Jones
59.5k974106
answered Nov 25 '18 at 15:14
O. JonesO. Jones
59.5k974106
answered Nov 25 '18 at 15:14
O. JonesO. Jones
59.5k974106
answered Nov 25 '18 at 15:14
O. JonesO. Jones
59.5k974106
59.5k974106
In thoery race conditations can still happen with this method
– Raymond Nijland
Nov 25 '18 at 16:28
add a comment |
In thoery race conditations can still happen with this method
– Raymond Nijland
Nov 25 '18 at 16:28
In thoery race conditations can still happen with this method
– Raymond Nijland
Nov 25 '18 at 16:28
In thoery race conditations can still happen with this method
– Raymond Nijland
Nov 25 '18 at 16:28
add a comment |
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If you use InnoDB you can use SELECT ... FOR UPDATE
– Raymond Nijland
Nov 25 '18 at 16:37