Persistence_get returns an array

[JackZ]

Hello

With the new 3.7.8 i get an error message about a wrong persistence data:

In an instrument, i created a persistence data using an array

Code: Select all

-- Create a new persistence object
persist_tank_level = persist_add("tank_level", "FLOAT[2]", {50.0,25.0})--main, aux

-- Get the data from the persistence object
local tank_level = persist_get(persist_tank_level)
print(tank_level)

then changed my mind and replaced the array by a single Float

Code: Select all

-- Create a new persistence object
persist_tank_level = persist_add("tank_level", "FLOAT", 50.0)--main, aux

-- Get the data from the persistence object
local tank_level = persist_get(persist_tank_level)
print(tank_level)

but apparently the persistence file has still an array, hence AM throws me an error when trying to use the retrieved tank_level value, which is still an array even though it is no longer declared as such.
Guess the format of the file is not updated. Where is the persistence file located, by the way?

Thanks

Jacques

[Corjan]

Hi,


From AM 3.6 the type argument is not actively used anymore. It is still there for backwards compatibility.
You can basically throw anything into a persistence object, and you will get exactly the same thing back.

That does mean that you are responsible as the instrument builder to be able to deal with type changes.


Corjan

[JackZ]

Hi,


From AM 3.7 I think the type is not used anymore. It is still there for backwards compatibility.
You can basically throw anything into a persistence object, and you will get exactly the same thing back.

That does mean that you are responsible as the instrument builder to be able to deal with type changes.


Corjan

Thnaks Corjan, but during the development process, the type of data has changed, so the persist_add() should overwrite the file written on the disk with the new value, am I correct?
I managed to deal with by changing the name of the persistence in the persist_add(), basically creating a new file, but that is a weird behaviour, and that means that there is still the old persistence file somewhere on my hard disk, hence the question about its location, so I can delete it.
I thought the persistence file should be located within the instrument folder to avoid name confilcts?

Jacques

[Corjan]

Hi,


You can do another persist_put with the correct type to fix it.

The type is not used internally anymore, so it won't reset the data ever.
This is also as designed, so you can 'upgrade' the persistence data once it changes between instrument versions.


Corjan

[Sling]

You can also find and delete the existing persistence file for that instrument or just clear persistence from the settings tab to delete them all. It really depends on how much other stuff you have that you want to retain the persistence for.

The individual persistence files can be found at Air manager/persistence/instruments or instrument_plugin.

Tony

[JackZ]

You can also find and delete the existing persistence file for that instrument or just clear persistence from the settings tab to delete them all. It really depends on how much other stuff you have that you want to retain the persistence for.

The individual persistence files can be found at Air manager/persistence/instruments or instrument_plugin.

Tony

Thanks Tony, exactly what I was looking for!