[OPEN-ILS-DEV] Dynamic INDB Circ/Holds weighting patch on Launchpad

[Thomas Berezansky]

Launchpad URL: http://bugs.launchpad.net/evergreen/+bug/677074

 From the description there:

Currently INDB circ and holds use a pre-defined weighting set for rule  
ordering. This can be changed via replacing the relevant "find"  
functions in the database, but this is not easily done for most people.

The attached patch is my first attempt at making INDB circ and holds  
use dynamic weighting in trunk.

The weight set for circ matchpoints is obtained based on the context  
ou of the circ (aka, where the circ is happening).

The weight set for hold matchpoints is obtained based on the item's  
circ library (aka, where the item lives).

Optionally, add an enabled circ.holds.weight_owner_not_circ internal  
flag to have the weight set for hold matchpoints be obtained based on  
the item's owning library (owner of the call number).

Warnings about this patch:

1 - I did not (yet) figure out how to add a permission (or set  
thereof) for editing, even though I added GUIs for doing so and links  
to them from the staff client.
2 - It is "lightly" tested, as in things still seemed to work and  
basic checks for the new functionality taking effect worked as  
expected, but that is about all I did.

I may write dokuwiki formatted documentation on how the weights end up  
working if it looks like this will be or is accepted.

(again, url is https://bugs.launchpad.net/evergreen/+bug/677074 if you  
want to take a look at the patch and other discussion there)

Thomas Berezansky
Merrimack Valley Library Consortium