2018-09-18 16:45:29 +00:00
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Lots
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####
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Lots are folders that contain devices and other lots, and can be
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at the same time under several lots.
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`Here <https://www.bustawin.com/
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dags-with-materialized-paths-using-postgres-ltree/>`_ you have
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a low-level technical implementation of how lots and their
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relationships are mapped.
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Create lots
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***********
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You create a lot by ``POST /lots/`` a `JSON Lot object <https://
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app.swaggerhub.com/apis/ereuse/devicehub/0.2/#model-Lot>`_.
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Adding / removing children
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**************************
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You can add lots to a lot by performing
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``POST /lots/<parent-lot-id>/children/?id=<child-lot-1>&id=<child-lot-2>``.
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Note that all lots must exist before. The **parent** lot is the
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lot containing the **children** lots without any intermediate lot.
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To remove children lots the idea is the same:
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``DELETE /lots/<parent-lot-id>/children/?id=<child-lot-1>&id=<child-lot-2>``.
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And for devices is all the same:
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``POST /lots/<parent-lot-id>/devices/?id=<device-id-1>&id=<device-id-2>``;
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idem for removing devices.
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2019-05-03 12:31:49 +00:00
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Sharing lots
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************
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Sharing a lot means giving certain permissions to users, like reading
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the characteristics of devices, or performing certain events.
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Linking lots
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============
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Linking lots means setting a reference to a lot in another Devicehub
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which supposedly have the same devices. One of both lots is considered
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to be the outgoing lot and the other one the ingoing, in the sense
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that the lifetime of the devices of the outgoing lot precedes the
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incoming lot; in other way, the events of the devices in the outgoing
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lot should (but not enforced) happen before that the events in the
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incoming lot.
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The lot has two fields that uses to keep a link: the Devicehub URL and
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the ID of the other lot (internal ID I suppose...).
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A device can only be in one incoming lot and in one outgoing lot.
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A device inside a linked lot, when it is confirmed the existence of
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an equal device in the other DB, is considered to be linked.
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A linked lot defines a both way share of READ Characteristics, at
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least.
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Users can sync the characteristics of devices + selected tags + selected rules,
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copying (but not deleting) devices between them. This ensures no
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traceability warnings when generating the lifetime of devices. In first
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iterations this process could be done manually (to allow user select
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tags and rules)
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Why linking lots
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----------------
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* Get the lifetime of devices (reporting). This way a Devicehub
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traverses the linked devices (as long as it has perm).
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* Send devices to another Devicehub (characteristics).
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* Ensure rules over linked devices.
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