database: database_maxage might remove all stored values from item

[bmxp]

Consider the following item:

Solltemperatur:
    type: num
    cache: True

The database plugin should drop in here to remove cache: True attribute thus the item is changed to:

Solltemperatur:
    type: num
    database: init
    database_maxage: 7

In case there is not much of change - let's assume no change for the last 14 days, then the attribute database_maxage: 7 will ensure that all data for this item is removed after 7 days.
But when restarting SmartHomeNG after 7 days, this will lead to a missing init value for the item since all database entries are already deleted.

A fix should be provided that ensures that at least the last data entry to the database is kept to provide an init value for a later restart of SmartHomeNG

[bmxp]

This should be fixed as of release 1.9.3.

Please test and report if there are conditions when this leads to problems

[msinn]

@bmxp Was this fixed in v1.9.3?

[aschwith]

Tested the implementations made in the database plugin (tested with V1.10 although the adaptations were made longtime before). Issue is fixed. Ticket can be closed.