[Koha-bugs] [Bug 15521] New: Make circulation rules backend more granular

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

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=15521

            Bug ID: 15521
           Summary: Make circulation rules backend more granular
 Change sponsored?: Sponsored
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: ASSIGNED
          Severity: enhancement
          Priority: P5 - low
         Component: System Administration
          Assignee: jweaver at bywatersolutions.com
          Reporter: jweaver at bywatersolutions.com
        QA Contact: testopia at bugs.koha-community.org
                CC: gmcharlt at gmail.com, nicole at bywatersolutions.com

To allow for more flexible specification of policy, a new table structure will
be created. Instead of a single row per branchcode/categorycode/itemtype with
columns for each policy value, we’ll have a row for each rule. This row would
contain the relevant branchcode/categorycode/itemtype and the name and contents
of the rule.

The first iteration of this will rewrite GetIssuingRule to fetch all of these
rules behind the scenes and return all of the rules for a given situation.

The second iteration will identify all code calling the subroutine that fetches
circulation rules, and instead of calling GetIssuingRule will fetch only the
circulation rules it needs. Once this is complete, the subroutine
GetIssuingRule will be removed altogether.

To migrate data to this new system, we will create a row for each column of
each row of the current schema. That is, each row in issuingrules will become
~20 rows in the new table (for loanlength, fine, etc.). This is less than
ideal, but we will develop a new frontend to make this structure more
manageable.

(See
http://wiki.koha-community.org/wiki/Circulation_Rules_Interface_and_Backend_Revamp_RFC#Backend
for more information.)

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