[Koha-bugs] [Bug 21674] Data integrity not enforced for library groups

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=21674

--- Comment #12 from Nick Clemens <nick at bywatersolutions.com> ---
Created attachment 97838
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=97838&action=edit
Bug 21674: Prevent to insert twice the same library in a group

You can create hierarchical groups of libraries you are not allowed to add
several times the same library to a given group/subgroup. The libraries
that are part of the group is not displayed on the interface, to prevent
the user to select it.

However this restriction is only done template-side, the controller and
module does not handle it.

To prevent that this patchset enforces the constraint at DB level, and
display a message to the end user.

Test plan:
- Go to Home › Administration › Library groups
- Add a group
- Add a library
- reload the page several times
=> Without this patch the same library appears several times in the group
=> With this patch applied you will see a friendly error message

Signed-off-by: Nick Clemens <nick at bywatersolutions.com>

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