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First version of delivery_solver refactored interface. Names were chosen not to conflict with existing solvers.

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Added comment to explain that explain should not return a list but a single message (divergence testers should not test multiple divergences at the same time if divergences can be resolved using different solvers).

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First version of target_solver refactored interface. Names do not conflict with existing solvers because target solvers are now ERP5 Documents.

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First version of delivery_solver refactored interface. Names were chosen not to conflict with existing solvers and to show that delivery solvers are about quantity.

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For example one simulation movement quantity -1 and another simulation movement
of quantity 1 that becomes one delivery movement of quantity 0.


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division and setting a quantity ratio of 0)


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add a test to check if PropertyTypeValidity (that is enabled everywhere) works fine if property is not accessible by user (eg. source_title property in Arrow property sheet is not accessible if source value is not accessible). Currently this test raises Unauthorized error, and will be fixed later.


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replace transaction subcommits (deprecated since Zope 2.8 or before) with optimistic savepoints, which do the same thing.

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Boolean type exists since Python 2.3. We don't need at all the compatibility with Python 2.2 or older.


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- if an alarm is not enabled, it should not be effective
- if an alarm is expired, it should not be effective
- an alarm should not be invoked only because it gets enabled




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* Accept NULL for alarm_date.

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* Stop setting a bogus default to alarm_date.
* Index alarm_date as well.

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If not enabled, alarm date should be None. Also, fix the test of tic. I think it was working only by chance.

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